CN112866045A - Link state detection method, multicast equipment and link state detection system - Google Patents

Link state detection method, multicast equipment and link state detection system Download PDF

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Publication number
CN112866045A
CN112866045A CN201911182292.4A CN201911182292A CN112866045A CN 112866045 A CN112866045 A CN 112866045A CN 201911182292 A CN201911182292 A CN 201911182292A CN 112866045 A CN112866045 A CN 112866045A
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multicast
link state
source
client
working
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CN112866045B (en
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冯丽荣
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/06—Generation of reports

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The application provides a link state detection method, multicast equipment and a link state detection system, wherein the link state detection method comprises the following steps: configuring a reverse unknown multicast group in multicast equipment of a multicast transmission network; the multicast transmission network comprises a client, multicast equipment and a target multicast source; the multicast equipment forwards the link state detection message sent by the client to the target multicast source through the reverse unknown multicast group; the link state detection message is used for detecting the state of a working link; the target multicast source sends a link state response message to the client according to the link state detection message; and the client determines that the working link state is normal under the condition of receiving the link state response message.

Description

Link state detection method, multicast equipment and link state detection system
Technical Field
The present application relates to the field of communications technologies, and in particular, to a link state detection method, a multicast device, and a link state detection system.
Background
In a multicast transmission Network such as a Packet Transport Network (PTN) application Network, multicast services are widely applied. With the increasing demand of network quality, it is necessary to add a protection mechanism to the multicast service. However, in the existing multicast service application scenario with protection, when the access point monitors or diagnoses the network link status, it can usually only diagnose the link status from the access point to the source node. Due to the inherent service characteristics of the multicast service, only a mechanism from a source node to an access point is used for message forwarding, and a forwarding mechanism from the access point to the source node is lacked, so that the access point cannot monitor or diagnose the state of a network link, and network faults cannot be identified in time.
Disclosure of Invention
The application provides a link state detection method, multicast equipment and a link state detection system, which are used for perfecting a link state detection mechanism and realizing link state monitoring from an access point to a source node.
In a first aspect, an embodiment of the present application provides a link status detection method, including:
configuring a reverse unknown multicast group in multicast equipment of a multicast transmission network; the multicast transmission network comprises a client, multicast equipment and a target multicast source;
the multicast equipment forwards the link state detection message sent by the client to the target multicast source through the reverse unknown multicast group; the link state detection message is used for detecting the state of a working link;
the target multicast source sends a link state response message to the client according to the link state detection message;
and the client determines that the working link state is normal under the condition of receiving the link state response message.
In a second aspect, an embodiment of the present application provides a link state detection system, including a client, a multicast device, and a target multicast source; the client is in communication connection with the multicast equipment, and the multicast equipment is in communication connection with the target multicast source; wherein the content of the first and second substances,
the client is used for sending a link state detection message and determining that the working link state is normal under the condition of receiving a link state response message sent by the target multicast source;
the multicast equipment configures a reverse unknown multicast group and is used for forwarding a link state detection message sent by the client to the target multicast source through the reverse unknown multicast group; wherein, the link state detection message is used for detecting the working link state;
and the target multicast source is used for sending the link state response message to the client according to the link state detection message.
In a third aspect, an embodiment of the present application provides a link status detection method, which is applied to a multicast device in a multicast transmission network, and includes:
receiving a link state detection message sent by a client, and forwarding the link state detection message to a target multicast source through a configured reverse unknown multicast group;
the link state detection message is used for detecting the state of a working link;
the client is used for sending a link state detection message and determining that the working link state is normal under the condition of receiving a link state response message sent by the target multicast source;
and the target multicast source is used for sending the link state response message to the client according to the link state detection message.
In a fourth aspect, an embodiment of the present application provides a link status detection apparatus configured in a multicast device in a multicast transmission network, including:
the detection message processing module is used for receiving a link state detection message sent by a client and forwarding the link state detection message to a target multicast source through a configured reverse unknown multicast group;
the link state detection message is used for detecting the state of a working link;
the client is used for sending a link state detection message and determining that the working link state is normal under the condition of receiving a link state response message sent by the target multicast source;
and the target multicast source is used for sending the link state response message to the client according to the link state detection message.
In a fifth aspect, an embodiment of the present application provides a multicast device, including:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the link state detection method of the third aspect.
In a sixth aspect, the present application provides a computer storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the link state detection method according to the third aspect.
In the embodiment of the application, the reverse unknown multicast group is configured in the multicast equipment of the multicast transmission network, so that the link state detection message sent by the client is forwarded to the target multicast source through the reverse unknown multicast group. When the target multicast source receives the link state detection message, a link state response message can be sent to the client. When the client receives the link state response message, the working link state can be determined to be normal, the problem that the existing multicast transmission network cannot monitor the link state from the access point to the source node is solved, a link state detection mechanism is perfected, and the link state monitoring from the access point to the source node is realized.
With regard to the above embodiments and other aspects of the present application and implementations thereof, further description is provided in the accompanying drawings description, detailed description and claims.
Drawings
Fig. 1a is a schematic flowchart of a link status detection method according to an embodiment of the present application;
fig. 1b is a non-switching request thumbnail of a P2MP L2 multicast transmission network with protection according to an embodiment of the present application;
fig. 1c is a thumbnail of a network state existence switching request with a protection scenario provided in an embodiment of the present application;
fig. 1d is a schematic diagram of a service implementation provided in the embodiment of the present application;
fig. 1e is a normal unicast service logic operation diagram provided in this embodiment of the present application
Fig. 1f is a switching state unicast service logic operation diagram provided in this embodiment of the present application;
fig. 2 is a schematic structural diagram of a link status detection system according to an embodiment of the present application;
fig. 3 is a schematic flowchart of a link status detection method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a link status detection apparatus according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a multicast device according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
In an exemplary implementation manner, fig. 1a is a schematic flowchart of a link status detection method provided in an embodiment of the present application. The method can be applied to the condition of monitoring the link state from the access point to the source node. Accordingly, as shown in fig. 1a, the road state detection method provided in the embodiment of the present application includes S110, S120, S130, and S140.
S110, configuring a reverse unknown multicast group in multicast equipment of a multicast transmission network; the multicast transmission network comprises a client, multicast equipment and a target multicast source.
The multicast transmission Network may be an application Network supporting a multicast transmission function, and for example, a PTN application Network and an EPON (Ethernet Passive Optical Network) may both be used as the multicast transmission Network. The client is a source node in the multicast transmission network configured with the reverse unknown multicast group, and can send a message to the access point. Illustratively, a PC (Personal Computer) side may serve as the client. The multicast device is a network device that performs a multicast transmission function, and for example, the PTN device may be a multicast device. The reverse unknown multicast group may be used to forward a packet sent by the client to the multicast source. That is, the message sent by the client is sent to the multicast source. The target multicast source is a multicast source in a multicast transmission network, and is a hardware device. Illustratively, a multicast-enabled wireless router may serve as a target multicast source. The target multicast source may only include the working multicast source, or may include both the working multicast source and the protection multicast source. The working multicast source can be a multicast source on a working path in a multicast network; the protection multicast source may be a multicast source on a protection path in a multicast network, and the embodiment of the present application does not limit the multicast source type of the target multicast source.
It should be noted that, in the prior art, the source node is a leaf node in the multicast transmission network, and the access node is a client in the multicast transmission network. In the embodiment of the present application, in order to monitor the working link state from the access point to the source node in the multicast transmission network, after configuring the reverse unknown multicast group for the multicast device, the client is converted into the source node and the leaf node is converted into the access node in the logical relationship.
S120, the multicast equipment forwards the link state detection message sent by the client to the target multicast source through the reverse unknown multicast group; and the link state detection message is used for detecting the state of the working link.
The working link state is a state of a path link in the network, and the working link may be a working path link or a protection path link. Correspondingly, the working link state may be a working source link state for the working path link or a protection source link state for the protection path link, and the embodiment of the present application does not limit specific types of the working link and the working link state.
Correspondingly, after the reverse unknown multicast group is configured for the multicast equipment, the multicast equipment can forward the link state detection packet sent by the client to the target multicast source through the reverse unknown multicast group. Optionally, the client may initiate a link state detection message (i.e., packet sending) using a ping technique, and the link state detection message may be used to detect the working link state.
S130, the target multicast source sends a link state response message to the client according to the link state detection message.
The link state response message may be a packet generated by the target multicast source according to the link state detection message.
In the embodiment of the present application, after receiving the link state detection packet, the target multicast source may send a link state response packet to the client according to the link state detection packet.
S140, the client determines that the working link state is normal under the condition of receiving the link state response message.
It can be understood that, if the working link state is abnormal, the client cannot normally receive the link state response message sent by the target multicast source. Therefore, in the embodiment of the present application, if the client receives the link status response packet, it may be determined that the working link status in the multicast transmission network is normal. That is, the monitoring of the working link state from the access node to the source node in the prior art is realized.
In the embodiment of the application, the reverse unknown multicast group is configured in the multicast equipment of the multicast transmission network, so that the link state detection message sent by the client is forwarded to the target multicast source through the reverse unknown multicast group. When the target multicast source receives the link state detection message, a link state response message can be sent to the client. When the client receives the link state response message, the working link state can be determined to be normal, the problem that the existing multicast transmission network cannot monitor the working link state from the access point to the source node is solved, a link state detection mechanism is perfected, and the working link state monitoring from the access point to the source node is realized.
On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.
In one example, configuring a reverse unknown multicast group may include: configuring an original reverse unknown multicast group according to the target service of the multicast transmission network; and adding the multicast information of the client and the target multicast source to the original reverse unknown multicast group to configure the reverse unknown multicast group.
The target service can be determined according to the multicast source type in the multicast transmission network. Illustratively, the target traffic may be unprotected traffic if the multicast source type in the multicast transmission network comprises only working multicast sources. If the multicast source type in the multicast transmission network includes both the working multicast source and the protection multicast source, the target service may be a service with protection. The original reverse unknown multicast group may be a reverse unknown multicast group to be configured, the information of which is empty. The multicast information of the client and the target multicast source may be service member information of the client and the target multicast source in the multicast device.
Specifically, when the reverse unknown multicast group is configured for the multicast device, the original reverse unknown multicast group may be created according to the target service of the multicast transmission network. Then, the multicast information of the client and the target multicast source may be added to the original reverse unknown multicast group to complete the configuration of the original reverse unknown multicast group.
In one example, adding the multicast information of the client and the target multicast source to the original reverse unknown multicast group may include: and adding the service members of the multicast equipment in the original reverse unknown multicast group.
The service member may be a node of each role of the client and the target multicast source in the multicast device. Illustratively, a work Root (W _ Root), a protection Root (P _ Root), a general Leaf (C _ Leaf), and the like may all be service members of the multicast device.
Specifically, when the multicast information of the client and the target multicast source is added to the original reverse unknown multicast group, the service members of the multicast device may be added to the original reverse unknown multicast group.
In one example, the target multicast source may include a working multicast source and a protection multicast source; the target traffic may comprise protected traffic; the business member includes at least one of a working root, a protection root, and a general leaf.
The working root may be a working path root node, the protection root may be a protection path root node, and the general leaf may be a client leaf node.
Optionally, in this embodiment of the present application, the target multicast source may include both a working multicast source and a protection multicast source. Accordingly, the target service may be a protected service, and the service member may include at least one of a work root, a protection root, and a general leaf.
In one example, adding the service member of the multicast device to the original reverse unknown multicast group may include: configuring the general leaf, and adding the next hop of the general leaf into the original reverse unknown multicast group; configuring the working root, and adding the next hop of the working root into the original reverse unknown multicast group; and/or configuring the protection root, and adding the next hop of the protection root into the original reverse unknown multicast group.
Specifically, when adding a service member of the multicast device to the original reverse unknown multicast group, a general leaf may be configured, and the next hop of the general leaf is added to the original reverse unknown multicast group. If the protection root and the working root need to be configured simultaneously, the working root can be configured first, the next hop of the working root is added into the original reverse unknown multicast group, and then the protection root can be configured, and the next hop of the protection root is added into the original reverse unknown multicast group. In addition, the application can also be only provided with a working root or only provided with a protection root. It should be noted that, in the embodiments of the present application, the order of arrangement of the general leaf, the working root, and the protection root is not limited.
In an example, after adding the service member of the multicast device to the original reverse unknown multicast group, the method may further include: forming a protection group according to the working root and the protection root; wherein the protection group is used for protecting the link detection operation of the client.
Correspondingly, after the service members of the multicast equipment are added in the original reverse unknown multicast group to complete the configuration of the original reverse unknown multicast group and form the reverse unknown multicast group, protection can be formed according to the service member information in the reverse unknown multicast group. Specifically, a protection group may be formed according to the working root and the protection root, and the protection group is enabled to be interrupted, and may be used for a link detection operation of the protection client, specifically, for a detection operation of the protection switching response switching client for detecting a link where the target multicast source (including the working multicast source and the protection multicast source) is located.
In an example, the forwarding, by the multicast device, the link state detection packet sent by the client to the target multicast source through the reverse unknown multicast group may include: the multicast equipment searches for a target service member included in the reverse unknown multicast group, and forwards a link state detection message sent by the client to the target multicast source according to the target service member; wherein the target business member comprises the working root and the protection root.
Specifically, when forwarding the link state detection packet to the target multicast source through the reverse unknown multicast group, the multicast device may search a working root and/or a protection root of a target service member included in the reverse unknown multicast group, so as to forward the link state detection packet sent by the client to the target multicast source according to the working root and/or the protection root. If the client receives the link loopback packet where the target multicast source is located, namely receives the link state response message sent by the target multicast source, the working link state can be determined to be normal.
In one example, the link state response message comprises a working source link state response message; the working link state comprises a working source link state; the determining, by the client, that the working link state is normal when the client receives the link state response packet may include: and determining that the working source link state is normal under the condition that the network state of the multicast transmission network does not have a switching request state and the client receives the working source link state response message.
The working source link state response message may be a packet sent back by the working multicast source to the client when the network state is in the state without the switching request.
Optionally, the link status response message may include a work source link status response message. The working link state may include a working source link state. Correspondingly, if the network state of the multicast transmission network does not have the switching request state and the client receives the working source link state response message, the working source link state can be determined to be normal.
In one example, the link state response message includes a protection source link state response message and the working link state includes a protection source link state; the determining, by the client, that the working link state is normal when the client receives the link state response packet may include: and determining that the protection source link state is normal under the condition that a switching request state exists in the network state of the multicast transmission network and the client receives the protection source link state response message.
The protection source link state response message may be a packet sent by the protection multicast source to the client when the network state is in the switching request state.
Optionally, the link status response message may include a protection source link status response message. The working link state may include a protection source link state. Correspondingly, if the network state of the multicast transmission network has the switching request state and the client receives the protection source link state response message, it can be determined that the protection source link state is normal.
P2MP (Point-to-Multipoint) is a transmission technique in PTN networks for transmitting multicast traffic from a single sending device to multiple receiving devices in the network. The multicast service only has one data stream in the same multicast service in the established forwarding channel, and the multicast data stream is transmitted to the multicast service branch. At the bifurcation point on the multicast path, the replication of the multicast data streams to different directions is completed, and only one multicast data stream in the same downstream direction is ensured, thereby avoiding the congestion of a backbone network.
Fig. 1b is a non-switching request thumbnail of a P2MP L2 multicast transport network with protection according to an embodiment of the present application. Fig. 1c is a thumbnail of a network state existence switching request with a protection scenario provided in an embodiment of the present application. As shown in fig. 1b and 1 c. An access PTN1 device is deployed between the client and the working multicast source and a PTN2 device is deployed between the client and the protection multicast source. The solid line represents the working path and the dashed line represents the protection path. PTN1 and PTN2 deploy business members in multiple roles, such as: w _ Root (work Root), P _ Root (protection Root), C _ Leaf (general Leaf), and the like.
In a specific example, a P2MP L2 multicast is taken as an example for illustration:
the Mtree (multicast transmission network) comprises member clients and multicast sources, creates an original reverse unknown multicast group, and adds the clients and the multicast sources into the original reverse unknown multicast group to complete the configuration of the reverse unknown multicast group. The client may use ping technology to detect the multicast source in C _ Leaf, and at this time, the detection packet may be forwarded to the multicast source in the same network. Specifically, in the initial state of the Mtree, the Mtree may add a client and a working multicast source to join the reverse unknown multicast group. In the protection state of the Mtree, the Mtree can add a client, a working multicast source and a protection multicast source to the reverse unknown multicast group. Correspondingly, in the initial state of the Mtree, the client and the working multicast source are in the same reverse unknown multicast group, and the client service forwards the packet to the working multicast source interface in the same reverse unknown multicast. In an Mtree protected scene, when a client detects in a normal scene, a link state detection message is concurrently sent to a working multicast source and a protection multicast source, the working multicast source and the protection multicast source are wrapped back, and a link state response message is sent to the client. The client can detect the link state of the working source under the condition that the network state has no request, and can detect the link state of the protection source under the condition that the network state requests to switch, thereby ensuring that the link state of the working source can be detected no matter whether the network state has a switching request or not.
Fig. 1d is a schematic view of a service implementation provided in an embodiment of the present application, fig. 1e is a schematic view of a normal-state unicast service logic operation provided in an embodiment of the present application, and fig. 1f is a schematic view of a switch-state unicast service logic operation provided in an embodiment of the present application. As shown in fig. 1d, when configuring a reverse unknown multicast group for a multicast device, a P2MP L2 service implementation layer with protection service may be configured, and an original reverse unknown multicast group is created for a P2MP L2 service. And then adding service members such as C _ Leaf, W _ Root and the like to the created original reverse unknown multicast group. Specifically, the next hop of the general leaf is added into the original reverse unknown multicast group, the next hop of the working root is added into the original reverse unknown multicast group, and the next hop of the protection root is added into the original reverse unknown multicast group. Correspondingly, after the configuration of the reverse unknown multicast group is completed, a protection group can be formed according to the W _ Root and the P _ Root, and the enabling of the protection group is interrupted, so as to be used for the link detection operation of the protection client, specifically for the detection operation of the link where the protection switching response switching client detects the target multicast source (including the working multicast source and the protection multicast source).
Illustratively, the working link status may be detected by a multicast device configured with a reverse unknown multicast group. As shown in fig. 1e, in a network state without any switching request, the client initiates a link state detection packet by using a ping technology, and after the service is accessed in the PTN device, a reverse unknown multicast group is used to search for service members including W _ Root and P _ Root, and then the link state detection packet is forwarded to the working multicast source and the protection multicast source. The working multicast source and the protection multicast source receive the link state detection message, and the working multicast source can send a link state response message to the client according to the link state detection message, namely send the working source link state response message to the client. The protection multicast source can do packet loss operation. At this time, if the client receives a working source link state response message sent by the working multicast source, it can be determined that the working source link state is normal.
As shown in fig. 1f, in the network state with a switching request state, the client initiates a link state detection packet by using ping technology, and after the service is accessed in the PTN device, the reverse unknown multicast group is used to search for service members including W _ Root and P _ Root, and then the link state detection packet is forwarded to the working multicast source and the protection multicast source. And the working multicast source and the protection multicast source receive the link state detection message, and the working multicast source can perform packet loss operation. The protection multicast source may send a link state response packet to the client according to the link state detection packet, that is, send a protection source link state response packet to the client. At this time, if the client receives a protection source link state response message sent by the protection multicast source, it may be determined that the protection source link state is normal.
In an exemplary implementation manner, an embodiment of the present application further provides a link status detection system, and fig. 2 is a schematic structural diagram of a link status detection system provided in the embodiment of the present application. For the content of the present embodiment that has not been detailed, reference may be made to the above embodiments, which are not described herein again.
As shown in fig. 2, the link state detection system provided by the embodiment of the present application may include a client 10, a multicast device 20, and a target multicast source 30; the client 10 is in communication connection with the multicast device 20, and the multicast device 20 is in communication connection with the target multicast source 30; the client 10 is configured to send a link state detection message, and determine that a working link state is normal when receiving a link state response message sent by the target multicast source 30; the multicast device 20 configures a reverse unknown multicast group, and is configured to forward the link state detection packet sent by the client 10 to the target multicast source 30 through the reverse unknown multicast group; wherein, the link state detection message is used for detecting the working link state; the target multicast source 30 is configured to send the link state response packet to the client 10 according to the link state detection packet.
The multicast transmission network may be an application network supporting a multicast transmission function, and for example, both a PTN application network and an EPON network may be used as the multicast transmission network. The client 10 is a source node in the multicast transmission network configured with the reverse unknown multicast group, and may send a message to the access point. The multicast device 20 is a network device that performs a multicast transmission function, and for example, the PTN device may be a kind of multicast device 20. The reverse unknown multicast group may be used to forward messages sent by the client 10 to the multicast source. That is, the message sent by the client 10 is sent to the multicast source. The target multicast source 30 is a multicast source in the multicast transmission network, and may only include a working multicast source, or may include both a working multicast source and a protection multicast source. The working multicast source can be a multicast source on a working path in a multicast network; the protection multicast source may be a multicast source on a protection path in the multicast network, and the embodiment of the present application does not limit the multicast source type of the target multicast source 30.
It should be noted that, in the prior art, the source node is a leaf node in the multicast transmission network, and the access node is a client in the multicast transmission network. In the embodiment of the present application, in order to monitor the working link state from the access point to the source node in the multicast transmission network, after configuring the reverse unknown multicast group for the multicast device, the client 10 is converted into the source node and the leaf node is converted into the access node in the logical relationship.
The working link state is a state of a path link in the network, and the working link may be a working path link or a protection path link. Correspondingly, the working link state may be a working source link state for the working path link or a protection source link state for the protection path link, and the embodiment of the present application does not limit specific types of the working link and the working link state.
Accordingly, after configuring the reverse unknown multicast group for the multicast device 20, the multicast device 20 may forward the link state detection packet sent by the client 10 to the target multicast source 30 through the reverse unknown multicast group. Alternatively, the client 10 may initiate a link state detection message (i.e., a packet) using ping techniques, and the link state detection message may be used to detect the working link state.
The link state response message may be a packet generated by the target multicast source 30 according to the link state detection message.
In this embodiment, after receiving the link status detection message, the target multicast source 30 may send a link status response message to the client 10 according to the link status detection message.
It can be understood that if the working link status is abnormal, the client 10 cannot normally receive the link status response message sent by the target multicast source 30. Therefore, in the embodiment of the present application, if the client 10 receives the link status response message, it may be determined that the working link status in the multicast transmission network is normal. That is, the monitoring of the working link state from the access node to the source node in the prior art is realized.
The link state detection system provided by the embodiment of the application comprises a client, multicast equipment and a target multicast source. The multicast device may configure a reverse unknown multicast group, so as to forward the link state detection packet sent by the client to the target multicast source through the reverse unknown multicast group. When the client receives a link state response message sent by a target multicast source, the client can determine that the working link state is normal, and solve the problem that the existing multicast transmission network cannot monitor the link state from the access point to the source node, so as to perfect a link state detection mechanism and realize the link state monitoring from the access point to the source node.
On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.
In one example, the multicast device 20 is configured to: configuring an original reverse unknown multicast group according to the target service of the multicast transmission network; adding the client 10 and the target multicast source 30 to the original reverse unknown multicast group to configure the reverse unknown multicast group.
The target service can be determined according to the multicast source type in the multicast transmission network. Illustratively, the target traffic may be unprotected traffic if the multicast source type in the multicast transmission network comprises only working multicast sources. If the multicast source type in the multicast transmission network includes both the working multicast source and the protection multicast source, the target service may be a service with protection. The original reverse unknown multicast group may be a reverse unknown multicast group to be configured, the information of which is empty. The multicast information of the client 10 and the target multicast source 30 may be the service membership information of the client 10 and the target multicast source 30 in the multicast device.
Specifically, when configuring the reverse unknown multicast group for the multicast device 20, the original reverse unknown multicast group may be created according to the target service of the multicast transmission network. The multicast information of the client 10 and the target multicast source 30 may then be added to the original reverse unknown multicast group to complete the configuration of the original reverse unknown multicast group.
In one example, the multicast device 20 is configured to: adding the service member of the multicast device 20 in the original reverse unknown multicast group.
Wherein the service member may be a node of each role of the client 10 and the target multicast source 30 in the multicast device. Illustratively, the work root, the protection root, the common leaf, etc. may all be business members of the multicast device 20.
Specifically, when adding the multicast information of the client 10 and the target multicast source 30 to the original reverse unknown multicast group, the service members of the multicast device 20 may be added to the original reverse unknown multicast group.
In one example, the target multicast source 30 includes a working multicast source and a protection multicast source; the target service comprises a protected service; the business members include a common leaf and at least one of a working root and a protection root.
The working root may be a working path root node, the protection root may be a protection path root node, and the general leaf may be a client leaf node.
Optionally, in this embodiment of the present application, the target multicast source may include both a working multicast source and a protection multicast source. Accordingly, the target service may be a protected service, and the service member must include a general leaf and may include at least one of a work root and a protection root.
In one example, the multicast device 20 is configured to: configuring the general leaf, and adding the next hop of the general leaf into the original reverse unknown multicast group; configuring the working root, and adding the next hop of the working root into the original reverse unknown multicast group; and/or configuring the protection root, and adding the next hop of the protection root into the original reverse unknown multicast group.
Specifically, when adding a service member of a multicast device to an original reverse unknown multicast group, a general leaf may be configured, and a next hop of the general leaf is added to the original reverse unknown multicast group, then a work root may be configured, and the next hop of the work root is added to the original reverse unknown multicast group, and finally a protection root may be configured, and the next hop of the protection root is added to the original reverse unknown multicast group. It should be noted that, in the embodiments of the present application, the order of arrangement of the general leaf, the working root, and the protection root is not limited.
In one example, the multicast device 20 is configured to: forming a protection group according to the working root and the protection root; wherein the protection group is used to protect the link detection operation of the client 10.
Correspondingly, after the service members of the multicast equipment are added in the original reverse unknown multicast group to complete the configuration of the original reverse unknown multicast group and form the reverse unknown multicast group, protection can be formed according to the service member information in the reverse unknown multicast group. Specifically, a protection group may be formed according to the working root and the protection root, and the protection group is enabled to be interrupted, and may be used for a link detection operation of the protection client, specifically, for a detection operation of the protection switching response switching client for detecting a link where the target multicast source (including the working multicast source and the protection multicast source) is located.
In one example, the multicast device 20 is configured to: searching a target service member included in the reverse unknown multicast group, and forwarding a link state detection packet sent by the client 10 to a target multicast source 30 according to the target service member; wherein the target business member comprises the working root and the protection root.
Specifically, when the multicast device 20 forwards the link state detection packet to the target multicast source 30 through the reverse unknown multicast group, the working root and/or the protection root of the target service member included in the reverse unknown multicast group may be searched, so as to forward the link state detection packet sent by the client 10 to the target multicast source 30 according to the working root and/or the protection root. If the client 10 receives the link return packet where the target multicast source 30 is located, that is, receives the link status response message sent by the target multicast source 30, it may be determined that the working link status is normal.
In one example, the link state response message comprises a working source link state response message; the working link state comprises a working source link state; the client 10 is configured to: and determining that the working source link state is normal under the condition that the network state of the multicast transmission network does not have a switching request state and the working source link state response message is received.
The working source link state response message may be a packet sent back by the working multicast source to the client 10 when the network state is in the non-switching request state.
Optionally, the link status response message may include a work source link status response message. The working link state may include a working source link state. Correspondingly, if the network state of the multicast transmission network does not have the switching request state, and the client 10 receives the working source link state response message, it may be determined that the working source link state is normal.
In one example, the link state response message comprises a protection source link state response message; the working link state comprises a protection source link state; the client 10 is configured to: and determining that the protection source link state is normal under the conditions that a switching request state exists in the network state of the multicast transmission network and the protection source link state response message is received.
The protection source link state response packet may be a packet sent by the protection multicast source to the client 10 in the network state in the switching request state.
Optionally, the link status response message may include a protection source link status response message. The working link state may include a protection source link state. Correspondingly, if the network state of the multicast transmission network has the switching request state and the client 10 receives the protection source link state response message, it may be determined that the protection source link state is normal.
In an exemplary implementation manner, fig. 3 is a schematic flowchart of a link status detection method provided in an embodiment of the present application. The method can be applied to the condition that the multicast equipment forwards the message for detecting the link state to the multicast source. Correspondingly, as shown in fig. 3, the method for detecting a road state provided in the embodiment of the present application includes S210.
S210, receiving a link state detection message sent by a client, and forwarding the link state detection message to a target multicast source through a configured reverse unknown multicast group.
The link state detection message is used for detecting the state of a working link;
the client is used for sending a link state detection message and determining that the working link state is normal under the condition of receiving a link state response message sent by the target multicast source;
and the target multicast source is used for sending the link state response message to the client according to the link state detection message.
According to the method and the device, the link state detection message sent by the client is received through the multicast equipment, the link state detection message is forwarded to the target multicast source through the reverse unknown multicast group configured by the multicast equipment, so that the target multicast source sends the link state response message to the client according to the link state detection message, the client determines that the working link state is normal under the condition of receiving the link state response message sent by the target multicast source, the problem that the existing multicast transmission network cannot monitor the link state from the access point to the source node is solved, the link state detection mechanism is perfected, and the link state monitoring from the access point to the source node is realized.
In one example, before receiving the link state detection message sent by the client, the method further includes: configuring an original reverse unknown multicast group according to the target service of the multicast transmission network; and adding the multicast information of the client and the target multicast source to the original reverse unknown multicast group to configure the reverse unknown multicast group.
In one example, adding the multicast information of the client and the target multicast source to the original reverse unknown multicast group may include: and adding the service members of the multicast equipment in the original reverse unknown multicast group.
In one example, the target multicast sources include a working multicast source and a protection multicast source; the target service comprises a protected service; the business members include a common leaf and at least one of a working root and a protection root.
In one example, adding the service member of the multicast device to the original reverse unknown multicast group may include: configuring the general leaf, and adding the next hop of the general leaf into the original reverse unknown multicast group; configuring the working root, and adding the next hop of the working root into the original reverse unknown multicast group; and/or configuring the protection root, and adding the next hop of the protection root into the original reverse unknown multicast group.
In one example, the business members include a general leaf, a work root, and a protection root; after adding the service member of the multicast device in the original reverse unknown multicast group, the method may further include: forming a protection group according to the working root and the protection root; wherein the protection group is used for protecting the link detection operation of the client.
In one example, forwarding the link state detection packet to a target multicast source through a configured reverse unknown multicast group may include: searching a target service member included in the reverse unknown multicast group, and forwarding a link state detection message sent by the client to the target multicast source according to the target service member; wherein the target business member comprises the working root and the protection root.
In one example, the link state response message comprises a working source link state response message; the working link state comprises a working source link state; the client is used for: and determining that the working source link state is normal under the condition that the network state of the multicast transmission network does not have a switching request state and the working source link state response message is received.
In one example, the link state response message comprises a protection source link state response message; the working link state comprises a protection source link state; the client is used for: and determining that the protection source link state is normal under the conditions that a switching request state exists in the network state of the multicast transmission network and the protection source link state response message is received.
In an exemplary embodiment, an embodiment of the present application provides a link status detection apparatus, where the link status detection apparatus is configured in a multicast device of a multicast transmission network. Fig. 4 is a schematic structural diagram of a link status detection apparatus according to an embodiment of the present application. As shown in fig. 4, the link status detection apparatus in the embodiment of the present application may include:
the detection packet processing module 310 is configured to receive a link state detection packet sent by a client, and forward the link state detection packet to a target multicast source through a configured reverse unknown multicast group;
the link state detection message is used for detecting the state of a working link;
the client is used for sending a link state detection message and determining that the working link state is normal under the condition of receiving a link state response message sent by the target multicast source;
and the target multicast source is used for sending the link state response message to the client according to the link state detection message.
According to the method and the device, the link state detection message sent by the client is received through the multicast equipment, the link state detection message is forwarded to the target multicast source through the reverse unknown multicast group configured by the multicast equipment, so that the target multicast source sends the link state response message to the client according to the link state detection message, the client determines that the working link state is normal under the condition of receiving the link state response message sent by the target multicast source, the problem that the existing multicast transmission network cannot monitor the link state from the access point to the source node is solved, the link state detection mechanism is perfected, and the link state monitoring from the access point to the source node is realized.
In one example, the apparatus further comprises: a reverse unknown multicast group configuration module, configured to configure an original reverse unknown multicast group according to a target service of the multicast transmission network; and adding the multicast information of the client and the target multicast source to the original reverse unknown multicast group to configure the reverse unknown multicast group.
In one example, the reverse unknown multicast group configuration module is specifically configured to: and adding the service members of the multicast equipment in the original reverse unknown multicast group.
In one example, the target multicast sources include a working multicast source and a protection multicast source; the target service comprises a protected service; the business members include a common leaf and at least one of a working root and a protection root.
In one example, the reverse unknown multicast group configuration module is specifically configured to: configuring the general leaf, and adding the next hop of the general leaf into the original reverse unknown multicast group; configuring the working root, and adding the next hop of the working root into the original reverse unknown multicast group; and/or configuring the protection root, and adding the next hop of the protection root into the original reverse unknown multicast group.
In one example, the business members include a general leaf, a work root, and a protection root; the apparatus may further include: a protection group forming module for forming a protection group according to the working root and the protection root; wherein the protection group is used for protecting the link detection operation of the client.
In an example, the detection packet processing module 310 is specifically configured to: searching a target service member included in the reverse unknown multicast group, and forwarding a link state detection message sent by the client to the target multicast source according to the target service member; wherein the target business member comprises the working root and the protection root.
In one example, the link state response message comprises a working source link state response message; the working link state comprises a working source link state; the client is used for: and determining that the working source link state is normal under the condition that the network state of the multicast transmission network does not have a switching request state and the working source link state response message is received.
In one example, the link state response message comprises a protection source link state response message; the working link state comprises a protection source link state; the client is used for: and determining that the protection source link state is normal under the conditions that a switching request state exists in the network state of the multicast transmission network and the protection source link state response message is received.
The link state detection device can execute the link state detection method provided by any embodiment of the application, and has corresponding functional modules and beneficial effects of the execution method. For details of the technology not described in detail in this embodiment, reference may be made to a link state detection method provided in any embodiment of the present application.
Since the above-described link state detection apparatus is an apparatus that can execute the link state detection method in the embodiment of the present application, based on the link state detection method described in the embodiment of the present application, a person skilled in the art can understand a specific implementation manner of the link state detection apparatus of the embodiment and various variations thereof, and therefore, how to implement the link state detection method in the embodiment of the present application by the link state detection apparatus is not described in detail herein. The scope of the present application is intended to be covered by the claims so long as those skilled in the art can implement the apparatus used in the link state detection method in the embodiments of the present application.
In an exemplary implementation manner, an embodiment of the present application provides a multicast device, and fig. 5 is a schematic structural diagram of a multicast device provided in the embodiment of the present application. As shown in fig. 5, the multicast device in the embodiment of the present application may include:
one or more processors 21 and storage 22; the number of the processors 21 of the multicast device may be one or more, and fig. 5 illustrates one processor 21 as an example; the storage device 22 is used to store one or more programs; the one or more programs are executed by the one or more processors 21.
The processor 21 and the storage device 22 in the multicast apparatus may be connected by a bus or other means, and fig. 5 illustrates the connection by the bus as an example.
The storage device 22, which is a computer-readable storage medium, may be configured to store software programs, computer-executable programs, and modules. The storage device 22 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the device, and the like. Further, the storage 22 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage device 22 may further include memory located remotely from the processor 21, which may be connected to the motherboard via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The multicast device provided by the embodiment of the application can be configured with a reverse unknown multicast group, and is used for forwarding a link state detection message sent by a client in a multicast transmission network to a target multicast source through the reverse unknown multicast group, so that the target multicast source sends a link state response message to the client according to the link state detection message, and the client determines that the working link state is normal under the condition of receiving the link state response message.
In an exemplary embodiment, the present application provides a computer storage medium storing a computer program, which when executed by a computer processor is configured to perform the link state detection method according to any one of the above embodiments of the present invention: receiving a link state detection message sent by a client, and forwarding the link state detection message to a target multicast source through a configured reverse unknown multicast group; the link state detection message is used for detecting the state of a working link; the client is used for sending a link state detection message and determining that the working link state is normal under the condition of receiving a link state response message sent by the target multicast source; and the target multicast source is used for sending the link state response message to the client according to the link state detection message.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (EPROM) or flash Memory), an optical fiber, a portable compact disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, Radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The above description is only exemplary embodiments of the present application, and is not intended to limit the scope of the present application.
It will be clear to a person skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a car mounted mobile station.
In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.
Embodiments of the application may be implemented by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.
Any logic flow block diagrams in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, Read Only Memory (ROM), Random Access Memory (RAM), optical storage devices and systems (digital versatile disks, DVDs, or CD discs), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.
The foregoing has provided by way of exemplary and non-limiting examples a detailed description of exemplary embodiments of the present application. Various modifications and adaptations to the foregoing embodiments may become apparent to those skilled in the relevant arts in view of the following drawings and the appended claims without departing from the scope of the invention. Therefore, the proper scope of the invention is to be determined according to the claims.

Claims (14)

1. A method for link state detection, comprising:
configuring a reverse unknown multicast group in multicast equipment of a multicast transmission network; the multicast transmission network comprises a client, multicast equipment and a target multicast source;
the multicast equipment forwards the link state detection message sent by the client to the target multicast source through the reverse unknown multicast group; the link state detection message is used for detecting the state of a working link;
the target multicast source sends a link state response message to the client according to the link state detection message;
and the client determines that the working link state is normal under the condition of receiving the link state response message.
2. The method of claim 1, wherein configuring the reverse unknown multicast group comprises:
configuring an original reverse unknown multicast group according to the target service of the multicast transmission network;
and adding the multicast information of the client and the target multicast source to the original reverse unknown multicast group to configure the reverse unknown multicast group.
3. The method of claim 2, wherein adding the multicast information of the client and the target multicast source to the original reverse unknown multicast group comprises:
and adding the service members of the multicast equipment in the original reverse unknown multicast group.
4. The method of claim 3, wherein the target multicast sources comprise a working multicast source and a protection multicast source; the target service comprises a protected service; the business members include a common leaf and at least one of a working root and a protection root.
5. The method of claim 4, wherein adding the service member of the multicast device to the original reverse unknown multicast group comprises:
configuring the general leaf, and adding the next hop of the general leaf into the original reverse unknown multicast group;
configuring the working root, and adding the next hop of the working root into the original reverse unknown multicast group; and/or
And configuring the protection root, and adding the next hop of the protection root into the original reverse unknown multicast group.
6. The method of claim 5, wherein the business members comprise a general leaf, a working root, and a protection root;
after adding the service member of the multicast device in the original reverse unknown multicast group, the method further includes:
forming a protection group according to the working root and the protection root;
wherein the protection group is used for protecting the link detection operation of the client.
7. The method of claim 5, wherein the forwarding, by the multicast device, the link state detection packet sent by the client to the target multicast source through the reverse unknown multicast group comprises:
the multicast equipment searches for a target service member included in the reverse unknown multicast group, and forwards a link state detection message sent by the client to the target multicast source according to the target service member;
wherein the target business member comprises the working root and the protection root.
8. The method of claim 7, wherein the link state response message comprises a working source link state response message; the working link state comprises a working source link state;
the determining, by the client, that the working link state is normal when the client receives the link state response packet includes:
and determining that the working source link state is normal under the condition that the network state of the multicast transmission network does not have a switching request state and the client receives the working source link state response message.
9. The method of claim 7, wherein the link state response message comprises a protection source link state response message; the working link state comprises a protection source link state;
the determining, by the client, that the working link state is normal when the client receives the link state response packet includes:
and determining that the protection source link state is normal under the condition that a switching request state exists in the network state of the multicast transmission network and the client receives the protection source link state response message.
10. A link state detection system is characterized by comprising a client, multicast equipment and a target multicast source; the client is in communication connection with the multicast equipment, and the multicast equipment is in communication connection with the target multicast source; wherein the content of the first and second substances,
the client is used for sending a link state detection message and determining that the working link state is normal under the condition of receiving a link state response message sent by the target multicast source;
the multicast equipment configures a reverse unknown multicast group and is used for forwarding a link state detection message sent by the client to the target multicast source through the reverse unknown multicast group; wherein, the link state detection message is used for detecting the working link state;
and the target multicast source is used for sending the link state response message to the client according to the link state detection message.
11. A link state detection method is applied to multicast equipment of a multicast transmission network, and is characterized by comprising the following steps:
receiving a link state detection message sent by a client, and forwarding the link state detection message to a target multicast source through a configured reverse unknown multicast group;
the link state detection message is used for detecting the state of a working link;
the client is used for sending a link state detection message and determining that the working link state is normal under the condition of receiving a link state response message sent by the target multicast source;
and the target multicast source is used for sending the link state response message to the client according to the link state detection message.
12. A link state detection apparatus configured in a multicast device of a multicast transmission network, comprising:
the detection message processing module is used for receiving a link state detection message sent by a client and forwarding the link state detection message to a target multicast source through a configured reverse unknown multicast group;
the link state detection message is used for detecting the state of a working link;
the client is used for sending a link state detection message and determining that the working link state is normal under the condition of receiving a link state response message sent by the target multicast source;
and the target multicast source is used for sending the link state response message to the client according to the link state detection message.
13. A multicast apparatus, comprising:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the link state detection method of claim 11.
14. A computer storage medium having stored thereon a computer program, characterized in that the program, when being executed by a processor, implements the link state detection method according to claim 11.
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