CN112866045B - 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
CN112866045B
CN112866045B CN201911182292.4A CN201911182292A CN112866045B CN 112866045 B CN112866045 B CN 112866045B CN 201911182292 A CN201911182292 A CN 201911182292A CN 112866045 B CN112866045 B CN 112866045B
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link state
multicast
source
client
working
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CN112866045A (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

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 a multicast device 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 the working link; the target multicast source sends a link state response message to the client according to the link state detection message; and under the condition that the client receives the link state response message, determining that the working link state is normal.

Description

Link state detection method, multicast equipment and link state detection system
Technical Field
The present invention 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
Multicast services are very widely used in multicast transport networks such as PTN (Packet Transport Network ) application networks. With the continuous improvement of network quality demands, a protection mechanism needs to be added to multicast services. However, in existing multicast service application scenarios with protection, when an access point monitors or diagnoses network link status, only the access point to source node link status is typically diagnosed. Because of the inherent service characteristics of multicast service, only a mechanism from a source node to an access point is needed for forwarding the message, and a forwarding mechanism from the access point to the source node is omitted, 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 method for detecting a link state, including:
configuring a reverse unknown multicast group in a multicast device 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 the working link;
the target multicast source sends a link state response message to the client according to the link state detection message;
and under the condition that the client receives the link state response message, determining that the working link state is normal.
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 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; 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 method for detecting a link state, which is applied to a multicast device of a multicast transmission network, including:
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 the 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 state detection apparatus configured in a multicast device of a multicast transmission network, including:
the detection message processing module is used for receiving a link state detection message sent by the 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 the 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, embodiments of the present application provide a multicast device, including:
one or more processors;
a storage means for storing one or more programs;
the 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 as described in the third aspect.
In a sixth aspect, embodiments of the present application provide a computer storage medium having stored thereon a computer program which, when executed by a processor, implements a 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 as to forward the link state detection message sent by the client to the target multicast source through the reverse unknown multicast group. After receiving the link state detection message, the target multicast source can send a link state response message to the client. When the client receives the link state response message, the working link state can be determined to be normal, and the problem that the existing multicast transmission network cannot monitor the link state from the access point to the source node is solved, so that a link state detection mechanism is perfected, and the link state monitoring from the access point to the source node is realized.
With respect to the above examples and other aspects of the present application and their implementation, further description is provided in the accompanying description, detailed description and claims.
Drawings
Fig. 1a is a flow chart of a link state detection method according to an embodiment of the present application;
fig. 1b is a thumbnail of a non-switching request 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 with protection scenario with a switching request according to an embodiment of the present application;
fig. 1d is a schematic diagram of a service implementation provided in an embodiment of the present application;
fig. 1e is a logic operation diagram of a normal unicast service according to an embodiment of the present application
Fig. 1f is a logic operation diagram of a switching state unicast service provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a link state detection system according to an embodiment of the present application;
fig. 3 is a flow chart of a link state detection method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a link state detection device 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
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
In an exemplary implementation, fig. 1a is a schematic flow chart of a link state detection method provided in the embodiment of the present application. The method can be suitable for 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 a multicast device 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, for example, both a PTN application network and an EPON (ethernet passive optical network ) may 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 side. The multicast device is a network device that performs a multicast transmission function, and illustratively, the PTN device may be a multicast device. The reverse unknown multicast group may be used to forward a message sent by a client to a 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 the 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 include only 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 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 terminal is converted into the source node and the leaf node is converted into the access node in the logic 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; the link state detection message is used for detecting the working link state.
The working link state is the state of a path link in the network, and the working link can be a working path link or a protection path link. Accordingly, 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, which is not limited by the working link and the specific type of the working link state in the embodiment of the present application.
Correspondingly, after the reverse unknown multicast group is configured for the multicast equipment, the multicast equipment can forward the link state detection message sent by the client to the target multicast source through the reverse unknown multicast group. Alternatively, the client may initiate a link state detection message (i.e., a packet) using a ping technique, which 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 this embodiment of the present application, after the target multicast source receives the link state detection message, a link state response message may be sent to the client according to the link state detection message.
And S140, under the condition that the client receives the link state response message, determining that the working link state is normal.
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 state response message, it may be determined that the working link state in the multicast transmission network is normal. That is, monitoring of the state of the active link from the access node to the source node in the prior art is achieved.
In the embodiment of the application, the reverse unknown multicast group is configured in the multicast equipment of the multicast transmission network so as to forward the link state detection message sent by the client to the target multicast source through the reverse unknown multicast group. After receiving the link state detection message, the target multicast source can send a link state response message to the client. When the client receives the link state response message, the working link state can be determined to be normal, and the problem that the existing multicast transmission network cannot monitor the working link state from the access point to the source node is solved, so that 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 embodiments, modified embodiments of the above embodiments are proposed, and it is to be noted here that only the differences from the above embodiments are described in the modified embodiments for the sake of brevity of description.
In one example, configuring the reverse unknown multicast group may include: configuring 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.
Wherein the target traffic may be determined according to a multicast source type in the multicast transport network. For example, if the multicast source type in the multicast transport network includes only working multicast sources, the target traffic may be unprotected traffic. The target traffic may be a protected traffic if the multicast source type in the multicast transport network includes both a working multicast source and a protection multicast source. The original reverse unknown multicast group may be a reverse unknown multicast group to be configured with information being null. 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 configuring a reverse unknown multicast group for a multicast device, an original reverse unknown multicast group can be created according to a target service of a multicast transmission network. Multicast information for the client and the target multicast source may then be added to the original reverse unknown multicast group to complete 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 service members of the multicast equipment in the original reverse unknown multicast group.
Wherein, the service member can be the node of each role of the client and the target multicast source in the multicast equipment. Illustratively, the working Root (w_root), the protection Root (p_root), the generic Leaf (c_leaf), etc. may 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, 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 service may include a protected service; the service member includes at least one of a working root, a protection root, and a generic 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.
Alternatively, in the 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 root, a root and a general leaf.
In one example, adding a service member of the multicast device to the original reverse unknown multicast group may include: configuring the universal leaf, and adding the next hop of the universal 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 a service member of the multicast device is added to the 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. 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, 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 configure only the working root or only the protection root. It should be noted that, the embodiment of the present application does not limit the configuration sequence of the general leaf, the working root and the protection root.
In one 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; the protection group is used for protecting the link detection operation of the client.
Correspondingly, service members of the multicast equipment are added in the original reverse unknown multicast group so as to complete configuration of the original reverse unknown multicast group and form the reverse unknown multicast group, and then protection can be formed according to the service member information in the reverse unknown multicast group. Specifically, a protection group can be formed according to the working root and the protection root, and the protection group enables interruption, which can be used for link detection operation of the protection client, and specifically, detection operation of the link where the detection target multicast source (including the working multicast source and the protection multicast source) of the protection switching response switching client is located.
In one 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 target service members 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 members; wherein, the target service member includes the root work and the root guard.
Specifically, when the multicast device forwards the link state detection message to the target multicast source 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 can be searched, so that the link state detection message sent by the client is forwarded to the target multicast source according to the working root and/or the protection root. If the client receives the link packet returned by the target multicast source, that is, 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 includes a work 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 link state response message is received may include: and 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, determining that the working source link state is normal.
The working source link state response message may be a packet sent by the working multicast source to the client in the state of no switching request by the network state.
Alternatively, the link state response message may include a working source link state 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 link state response message is received may include: and under the condition that the network state of the multicast transmission network has a switching request state and the client receives the protection source link state response message, determining that the protection source link state is normal.
The protection source link state response message may be a packet sent by the protection multicast source to the client in the state of the network state in the switching request.
Optionally, the link state response message may include a protection source link state response message. The working link state may include a protection source link state. Correspondingly, if the network state of the multicast transmission network has a switching request state and the client receives the protection source link state response message, the protection source link state can be determined to be normal.
P2MP (Point-to-Multipoint) is a transmission technique in PTN networks that transfers multicast traffic from a single sender device to multiple receivers 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. And on the bifurcation point of the multicast path, the replication of the multicast data streams in different directions is completed, and only one multicast data stream exists in the same downstream direction, so that the congestion of a backbone network is avoided.
Fig. 1b is a thumbnail of a non-switching request 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 with protection scenario with a switching request according to 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 broken line represents the protection path. PTN1 and PTN2 deploy service members of multiple roles, such as: w_root, p_root, c_leaf, etc.
In a specific example summary, P2MP L2 multicast is taken as an example illustration:
An Mtree (a multicast transmission network) includes member clients and multicast sources, creates an original reverse unknown multicast group, and adds the clients and the multicast sources to the original reverse unknown multicast group to complete configuration of the reverse unknown multicast group. The client may use a ping technique to detect the multicast source at c_leaf, at which time the detection message 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 the reverse unknown multicast group. In the protected 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 message to the working multicast source interface in the same reverse unknown multicast. In the protected scene of the Mtree, the client side detects the link state detection message in normal scene and sends the link state response message to the client side by sending back the link state detection message to the working multicast source and the protection multicast source. The client can detect the link state of the working source in the state that the network state has no request, and can detect the link state of the protection source in the network state request switching scene, 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 diagram of a service implementation provided by an embodiment of the present application, fig. 1e is a normal-state unicast service logic operation diagram provided by an embodiment of the present application, and fig. 1f is a switching-state unicast service logic operation diagram provided by 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 a protection service may be configured, and an original reverse unknown multicast group is created for the P2MP L2 service. Then, adding C_leaf, W_root and other service members to the created original reverse unknown multicast group. Specifically, adding the next hop of the general leaf into the original reverse unknown multicast group, adding the next hop of the working root into the original reverse unknown multicast group, and adding the next hop of the protection root into the original reverse unknown multicast group. Correspondingly, after the reverse unknown multicast group is configured, a protection group can be formed according to the W_root and the P_root, and the protection group is enabled to be interrupted for the link detection operation of the protection client, and is particularly used for the detection operation of the link where the detection target multicast source (including the working multicast source and the protection multicast source) of the protection switching response switching client is located.
Illustratively, the working link state may be detected using a multicast device configured with a reverse unknown multicast group. As shown in fig. 1e, in the state that the network state has no switching request, the client initiates a link state detection message by using a ping technology, after the service is accessed to the PTN device, the reverse unknown multicast group is utilized to find that the service member contains w_root and p_root, and then the link state detection message 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, that is, send the link state response message of the working source to the client. The protection multicast source can do packet loss operation. At this time, if the client receives the working source link state response message sent by the working multicast source, it can determine that the working source link state is normal.
As shown in fig. 1f, in the state that a switching request exists in the network state, a client initiates a link state detection message by using a ping technology, after a service is accessed to a PTN device, a reverse unknown multicast group is utilized to find that a service member contains w_root and p_root, and then the link state detection message is forwarded to a working multicast source and a protection multicast source. The working multicast source and the protection multicast source receive the link state detection message, and the working multicast source can do packet loss operation. The protection multicast source may send a link state response message to the client according to the link state detection message, that is, send a protection source link state response message to the client. At this time, if the client receives the protection source link state response message sent by the protection multicast source, it can determine that the protection source link state is normal.
In an exemplary implementation manner, the embodiment of the present application further provides a link state detection system, and fig. 2 is a schematic structural diagram of the link state detection system provided in the embodiment of the present application. Reference may be made to the above embodiments for details of this embodiment, which are not described herein.
As shown in fig. 2, the link state detection system provided in 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 the 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 message sent by the client 10 to the target multicast source 30 through the reverse unknown multicast group; 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 message to the client 10 according to the link state detection message.
The multicast transmission network may be an application network supporting a multicast transmission function, for example, both a PTN application network and an EPON may be used as the multicast transmission network. The client 10 is a source node in a multicast transmission network configured with a reverse unknown multicast group, and may send a message to an access point. Multicast device 20 is a network device that performs multicast transmission functions, and illustratively, a PTN device may be used as a type of multicast device 20. The reverse unknown multicast group may be used to forward messages sent by the client 10 to the multicast source. I.e. 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 include only 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 a 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 the state of a path link in the network, and the working link can be a working path link or a protection path link. Accordingly, 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, which is not limited by the working link and the specific type of the working link state in the embodiment of the present application.
Accordingly, after configuring the reverse unknown multicast group for the multicast device 20, the multicast device 20 may forward the link state detection message 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 a ping technique, 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 the target multicast source 30 receives the link state detection message, a link state response message may be sent to the client 10 according to the link state detection message.
It can be appreciated that if the working link state is abnormal, the client 10 cannot normally receive the link state response message sent by the target multicast source 30. Therefore, in the embodiment of the present application, if the client 10 receives the link state response message, it may be determined that the working link state in the multicast transmission network is normal. That is, monitoring of the state of the active link from the access node to the source node in the prior art is achieved.
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 the reverse unknown multicast group to forward the link state detection message sent by the client to the target multicast source through the reverse unknown multicast group. When the client receives the link state response message sent by the target multicast source, the working link state can be determined to be normal, and the problem that the existing multicast transmission network cannot monitor the link state from the access point to the source node is solved, so that a link state detection mechanism is perfected, and the link state monitoring from the access point to the source node is realized.
On the basis of the above embodiments, modified embodiments of the above embodiments are proposed, and it is to be noted here that only the differences from the above embodiments are described in the modified embodiments for the sake of brevity of description.
In one example, the multicast device 20 is to: configuring an original reverse unknown multicast group according to a target service of the multicast transmission network; client 10 and target multicast source 30 are added to the original reverse unknown multicast group to configure the reverse unknown multicast group.
Wherein the target traffic may be determined according to a multicast source type in the multicast transport network. For example, if the multicast source type in the multicast transport network includes only working multicast sources, the target traffic may be unprotected traffic. The target traffic may be a protected traffic if the multicast source type in the multicast transport network includes both a working multicast source and a protection multicast source. The original reverse unknown multicast group may be a reverse unknown multicast group to be configured with information being null. The multicast information of the client 10 and the target multicast source 30 may be service member 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. Multicast information for 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 to: the service members of the multicast device 20 are added to the original reverse unknown multicast group.
Wherein the service members may be nodes of respective roles of the client 10 and the target multicast source 30 in the multicast device. Illustratively, the root, the leaf, etc. may be a service member of the multicast device 20.
Specifically, when the multicast information of the client 10 and the target multicast source 30 is added 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 service with protection; the service members include generic leaves and at least one of a root and a root guard.
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.
Alternatively, in the 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, the service member must include a generic leaf, and may include at least one of a root and a root.
In one example, the multicast device 20 is to: configuring the universal leaf, and adding the next hop of the universal 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 a service member of a multicast device is added to an original reverse unknown multicast group, a general leaf may be configured, a next hop of the general leaf is added to the original reverse unknown multicast group, then a working root may be configured, a next hop of the working root is added to the original reverse unknown multicast group, finally a protection root may be configured, and a next hop of the protection root is added to the original reverse unknown multicast group. It should be noted that, the embodiment of the present application does not limit the configuration sequence of the general leaf, the working root and the protection root.
In one example, the multicast device 20 is 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, service members of the multicast equipment are added in the original reverse unknown multicast group so as to complete configuration of the original reverse unknown multicast group and form the reverse unknown multicast group, and then protection can be formed according to the service member information in the reverse unknown multicast group. Specifically, a protection group can be formed according to the working root and the protection root, and the protection group enables interruption, which can be used for link detection operation of the protection client, and specifically, detection operation of the link where the detection target multicast source (including the working multicast source and the protection multicast source) of the protection switching response switching client is located.
In one example, the multicast device 20 is to: searching a target service member included in the reverse unknown multicast group, so as to forward a link state detection message sent by the client 10 to a target multicast source 30 according to the target service member; wherein the target business member includes the root work and the root guard.
Specifically, when the multicast device 20 forwards the link state detection message 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 message 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 a link packet where the target multicast source 30 is located, that is, receives a link state response message sent by the target multicast source 30, it can be determined that the working link state is normal.
In one example, the link state response message includes a work source link state response message; the working link state comprises a working source link state; the client 10 is configured to: and 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, determining that the working source link state is normal.
The working source link state response message may be a packet sent by the working multicast source to the client 10 when the network state is in the state without a switching request.
Alternatively, the link state response message may include a working source link state 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 can be determined that the working source link state is normal.
In one example, the link state response message includes a protection source link state response message; the working link state comprises a protection source link state; the client 10 is configured to: and under the condition that the network state of the multicast transmission network has a switching request state and the protection source link state response message is received, determining that the protection source link state is normal.
The protection source link state response message may be a packet sent by the protection multicast source to the client 10 when the network state is in the state of a switching request.
Optionally, the link state response message may include a protection source link state response message. The working link state may include a protection source link state. Correspondingly, if the network state of the multicast transmission network has a switching request state, and the client 10 receives the protection source link state response message, it can be determined that the protection source link state is normal.
In an exemplary implementation, fig. 3 is a schematic flow chart of a link state detection method provided in the embodiment of the present application. The method can be suitable for the situation that the multicast equipment forwards the message for detecting the link state to the multicast source. Accordingly, 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 the 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 multicast equipment receives the link state detection message sent by the client, and forwards the link state detection message 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, and the client determines that the working link state is normal under the condition that the link state response message sent by the target multicast source is received, and the problem that the existing multicast transmission network cannot monitor the link state from the access point to the source node is solved, so that 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 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, adding the multicast information of the client and the target multicast source to the original reverse unknown multicast group may include: and adding service members of the multicast equipment in the original reverse unknown multicast group.
In one example, the target multicast source includes a working multicast source and a protection multicast source; the target service comprises a service with protection; the service members include generic leaves and at least one of a root and a root guard.
In one example, adding a service member of the multicast device to the original reverse unknown multicast group may include: configuring the universal leaf, and adding the next hop of the universal 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 generic leaves, workroots, and protection roots; 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; the protection group is used for protecting the link detection operation of the client.
In one example, forwarding the link state detection message to the target multicast source through the configured reverse unknown multicast group may include: searching a target service member included in the reverse unknown multicast group, so as to forward 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 includes the root work and the root guard.
In one example, the link state response message includes a work source link state response message; the working link state comprises a working source link state; the client is used for: and 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, determining that the working source link state is normal.
In one example, the link state response message includes a protection source link state response message; the working link state comprises a protection source link state; the client is used for: and under the condition that the network state of the multicast transmission network has a switching request state and the protection source link state response message is received, determining that the protection source link state is normal.
In an exemplary embodiment, a link state detection apparatus is provided, where the link state detection apparatus is configured in a multicast device of a multicast transmission network. Fig. 4 is a schematic structural diagram of a link state detection device according to an embodiment of the present application. As shown in fig. 4, the link state detection apparatus in the embodiment of the present application may include:
the detection message processing module 310 is configured to receive a link state detection message sent by a client, and forward 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 the 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 multicast equipment receives the link state detection message sent by the client, and forwards the link state detection message 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, and the client determines that the working link state is normal under the condition that the link state response message sent by the target multicast source is received, and the problem that the existing multicast transmission network cannot monitor the link state from the access point to the source node is solved, so that 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: the reverse unknown multicast group configuration module is used for 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, the reverse unknown multicast group configuration module is specifically configured to: and adding service members of the multicast equipment in the original reverse unknown multicast group.
In one example, the target multicast source includes a working multicast source and a protection multicast source; the target service comprises a service with protection; the service members include generic leaves and at least one of a root and a root guard.
In one example, the reverse unknown multicast group configuration module is specifically configured to: configuring the universal leaf, and adding the next hop of the universal 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 generic leaves, workroots, and protection roots; the apparatus may further include: the protection group forming module is used for forming a protection group according to the working root and the protection root; the protection group is used for protecting the link detection operation of the client.
In one example, the detection message processing module 310 is specifically configured to: searching a target service member included in the reverse unknown multicast group, so as to forward 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 includes the root work and the root guard.
In one example, the link state response message includes a work source link state response message; the working link state comprises a working source link state; the client is used for: and 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, determining that the working source link state is normal.
In one example, the link state response message includes a protection source link state response message; the working link state comprises a protection source link state; the client is used for: and under the condition that the network state of the multicast transmission network has a switching request state and the protection source link state response message is received, determining that the protection source link state is normal.
The link state detection device can execute the link state detection method provided by any embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. Technical details not described in detail in this embodiment may be referred to the link state detection method provided in any embodiment of the present application.
Since the above-described link state detection apparatus is an apparatus capable of executing the link state detection method in the embodiment of the present application, those skilled in the art will be able to understand the specific implementation of the link state detection apparatus of the present embodiment and various modifications thereof based on the link state detection method described in the embodiment of the present application, so how the link state detection apparatus implements the link state detection method in the embodiment of the present application will not be described in detail herein. The device used by those skilled in the art to implement the link state detection method in the embodiments of the present application falls within the scope of protection intended by the present application.
In an exemplary implementation manner, a multicast device is provided in the embodiment of the present application, 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 a storage device 22; the multicast device may have one or more processors 21, one processor 21 being taken as an example in fig. 5; the storage device 22 is used for storing one or more programs; the one or more programs are executed by the one or more processors 21.
The processors 21, the storage means 22 in the multicast device may be connected by a bus or other means, in fig. 5 by way of example.
The storage device 22, as a kind of 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, at least one application program required for a function; the storage data area may store data created according to the use of the device, etc. In addition, 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 remotely located with respect to 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 present application may configure a reverse unknown multicast group, which is configured to forward 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 when receiving the link state response message.
In one exemplary implementation, the present embodiments provide a computer storage medium storing a computer program, which when executed by a computer processor is configured to perform a 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 the 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.
The computer storage media of embodiments of the invention may take the form of 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. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any 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 ((ErasableProgrammable 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 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.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. 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 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 ++ 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 kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application.
It will be appreciated by those skilled in the art that the term user terminal encompasses any suitable type of wireless user equipment, such as a mobile telephone, a portable data processing device, a portable web browser or a car 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 present application may be implemented by a data processor of a mobile device executing computer program instructions, e.g. in a processor entity, either in hardware, or in 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 or object code written in any combination of one or more programming languages.
The block diagrams of any logic flow 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 disk DVD or CD optical disk), 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.
By way of exemplary and non-limiting example, a detailed description of exemplary embodiments of the present application has been provided above. Various modifications and adaptations to the above embodiments may become apparent to those skilled in the art without departing from the scope of the invention, which is defined in the accompanying drawings and claims. Accordingly, the proper scope of the invention is to be determined according to the claims.

Claims (14)

1. A method for detecting a link state, comprising:
configuring a reverse unknown multicast group in a multicast device 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 the working link;
the target multicast source sends a link state response message to the client according to the link state detection message;
and under the condition that the client receives the link state response message, determining that the working link state is normal.
2. The method of claim 1, wherein configuring the reverse unknown multicast group comprises:
configuring 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.
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 service members of the multicast equipment in the original reverse unknown multicast group.
4. The method of claim 3, wherein the target multicast source comprises a working multicast source and a protection multicast source; the target service comprises a service with protection; the service members include generic leaves and at least one of a root and a root guard.
5. The method of claim 4, wherein adding the service members of the multicast device in the original reverse unknown multicast group comprises:
configuring the universal leaf, and adding the next hop of the universal 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 generic leaves, workroots, and protection roots;
after adding the service member of the multicast device in the original reverse unknown multicast group, the method further comprises:
forming a protection group according to the working root and the protection root;
The protection group is used for protecting the link detection operation of the client.
7. The method of claim 5, wherein the multicast device forwarding the link state detection message sent by the client to the target multicast source through the reverse unknown multicast group, comprising:
the multicast equipment searches target service members 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 members;
wherein the target business member includes the root work and the root guard.
8. The method of claim 7, wherein the link state response message comprises a work source link state response message; the working link state comprises a working source link state;
the client determines that the working link state is normal under the condition that the link state response message is received, and the method comprises the following steps:
and 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, determining that the working source link state is normal.
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 client determines that the working link state is normal under the condition that the link state response message is received, and the method comprises the following steps:
and under the condition that the network state of the multicast transmission network has a switching request state and the client receives the protection source link state response message, determining that the protection source link state is normal.
10. The link state detection system is characterized by comprising 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 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; 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 applied to a multicast device of a multicast transmission network, comprising:
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 the 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 the 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 the 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 device, comprising:
one or more processors;
a storage means for storing one or more programs;
the 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, which when executed by a processor implements the link state detection method according to claim 11.
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