WO2018001020A1

WO2018001020A1 - Aggregated link based message forwarding method and device

Info

Publication number: WO2018001020A1
Application number: PCT/CN2017/086192
Authority: WO
Inventors: 朱杰
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-06-30
Filing date: 2017-05-26
Publication date: 2018-01-04
Also published as: CN107566267A

Abstract

A message forwarding method and a device for use in a field of link aggregation, wherein the method comprises: receiving a message, wherein the message carries feature information of the message (S202); on a condition that the message further carries information of a forwarding port corresponding to the feature information, forwarding the message from the forwarding port corresponding to the feature information (204); or inquiring the forwarding port corresponding to the feature information from a pre-set rule table when the message does not carry the forwarding port information corresponding to the feature information; and forwarding the message from the port corresponding to the feature information when the forwarding port information corresponding to the feature information is obtained(S206).

Description

Message forwarding method and device based on aggregated link

Technical field

This document relates to, but is not limited to, the field of communications, and in particular, to a packet forwarding method and apparatus based on an aggregated link.

Background technique

Link aggregation, which follows the IEEE 802.3AD link aggregation protocol. Figure 1 is a schematic diagram of an aggregation link. As shown in Figure 1, a link aggregation mechanism can be used to bind several ports together to form a logical port, which can increase the bandwidth and load balancing traffic.

When determining the packet forwarding port, the following methods are mainly used:

1. The hash forwarding algorithm is used to determine the packet forwarding port to implement traffic load sharing.

2. Based on the hash algorithm, based on the statistics of the data stream forwarding, set a weighting value for the packet forwarding information to determine the forwarding port of each packet, thereby achieving more accurate load sharing.

However, in the following scenarios, for example, there are two types of packets, Class A packets, and Class B packets in Device 1, and the traffic of Class A packets is large, and the priority of packets is also high, but Class A is for this. The system is not very important, allowing partial packet loss, while Class B packets, although not of high priority, are important to the system and do not allow packet loss. In this case, if the type A packet and the type B packet enter the device 2 through the aggregation port of the device 1, the processing capability of the device 2 is limited, and all the class A packets and the class B packets cannot be processed at the same time. There will be no difference packet loss for Class A and Class B, which will lead to a series of other problems.

The problem that the packet is forwarded in the load balancing mode causes the important packet to be lost. The prior art has not proposed a solution.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a packet forwarding method and device based on an aggregated link, which can avoid important packet loss.

The embodiment of the invention adopts the following technical solutions:

A packet forwarding method applied in the field of link aggregation includes the following processing steps:

Receiving a message, wherein the message carries characteristic information of the message;

And if the packet further carries the forwarding port information corresponding to the feature information, forwarding the packet according to the forwarding port corresponding to the feature information; or

If the packet does not carry the forwarding port information corresponding to the feature information, query the forwarding port information corresponding to the feature information from a preset rule table; and query the forwarding port corresponding to the feature information. The information is forwarded according to the forwarding port corresponding to the feature information.

Optionally, if the packet further carries the forwarding port information corresponding to the feature information, forwarding the packet according to the forwarding port corresponding to the feature information includes: when the forwarding port is unique, according to The forwarding port corresponding to the feature information forwards the packet; when the forwarding port is not unique, the packet is forwarded by selecting a forwarding port from the forwarding port according to a hash algorithm.

Optionally, the packet forwarding method further includes: recording, in the case that the packet further carries the forwarding port information corresponding to the feature information, the forwarding port information corresponding to the feature information and the feature information to In the rules table.

Optionally, the packet forwarding method further includes: forwarding the packet according to a hashing algorithm, if the forwarding port information corresponding to the feature information is not queried.

Optionally, forwarding the packet according to the forwarding port corresponding to the feature information includes: when the forwarding table carries the forwarding speed information of the forwarding port, according to the forwarding port corresponding to the feature information, The forwarding speed forwards the message.

Optionally, the feature information in the packet forwarding method is a source MAC address, a destination Mac address, a virtual local area network VLAN id, and a quality of service QoS information of the packet.

The embodiment of the invention further discloses a message forwarding device applied to the field of link aggregation, which comprises:

The receiving module is configured to receive a packet, where the packet carries the feature information of the packet;

The querying module is configured to query the forwarding port information corresponding to the feature information from a preset rule table if the packet does not carry the forwarding port information corresponding to the feature information;

The first forwarding module is configured to: when the packet further carries the forwarding port information corresponding to the feature information, forward the packet according to the forwarding port corresponding to the feature information; or, in the packet When the forwarding port information corresponding to the feature information is not carried, the packet is forwarded according to the forwarding port corresponding to the feature information that is queried from the preset rule table.

Optionally, the first forwarding module is configured to: according to the forwarding port information corresponding to the feature information, if the packet further carries the forwarding port information corresponding to the feature information, The message is: when the forwarding port corresponding to the feature information is unique, the packet is forwarded according to the forwarding port corresponding to the feature information; and when the forwarding port corresponding to the feature information is not unique, according to a hash algorithm The selected one of the forwarding ports forwards the packet.

Optionally, the first forwarding module is further configured to: when the forwarding table carries the forwarding speed information of the forwarding port, the forwarding port corresponding to the feature information is forwarded by the forwarding port. Forward the message.

Optionally, the packet forwarding device further includes a maintenance module, configured to forward the feature information and the feature information when the packet further carries the forwarding port information corresponding to the feature information. Port information is recorded in the rules table.

Optionally, the packet forwarding device further includes a second forwarding module, configured to forward the packet according to the hash algorithm if the forwarding port information corresponding to the feature information is not queried.

In the embodiment of the present invention, the feature information is extracted and the special packet is sent to the special port to avoid the problem that the important packet is lost when the packet is forwarded by the load balancing mode, and the specific packet is transmitted through the aggregation link. The specific port is forwarded, and other packets are still forwarded according to normal load sharing, which ensures that important packets can be forwarded reliably and efficiently.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic diagram of an aggregated link;

2 is a flow chart of packet forwarding of an aggregated link according to an embodiment of the present invention;

3 is a block diagram of a packet forwarding device of an aggregated link according to an embodiment of the present invention;

4 is a block diagram 2 of a packet forwarding device of an aggregated link according to an embodiment of the present invention;

FIG. 5 is a third block diagram of a packet forwarding device of an aggregated link according to an embodiment of the present disclosure;

FIG. 6 is a flowchart of a method for specifying a packet forwarding port in a link aggregation port according to an embodiment of the present disclosure;

7 is a block diagram of a device for specifying a packet forwarding port in a link aggregation port according to an embodiment of the present invention;

FIG. 8 is a second block diagram of a device for specifying a packet forwarding port in a link aggregation port according to an embodiment of the present invention.

Embodiments of the invention

The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments.

The embodiment of the present invention provides a packet forwarding method applied in the field of link aggregation, which can forward a specific packet from a specific port in an aggregation link, and other packets are performed according to a default hash algorithm of the device. Message forwarding. FIG. 2 is a flow chart of packet forwarding of an aggregated link according to an embodiment of the present invention. As shown in FIG. 2, the packet forwarding method includes the following processing steps:

Step S202, receiving a packet, where the packet carries the feature information of the packet;

Step S204: If the packet further carries the forwarding port information corresponding to the feature information, the packet is forwarded according to the forwarding port corresponding to the feature information; or

Step S206, if the packet does not carry the forwarding port information corresponding to the feature information, query the forwarding port information corresponding to the feature information from the preset rule table; and query the forwarding port information corresponding to the feature information. The packet is forwarded according to the port corresponding to the feature information.

Optionally, the packet forwarding method further includes: in the case that the packet further carries the forwarding port information corresponding to the feature information, the forwarding port information corresponding to the feature information and the feature information is recorded in the rule table.

The device maintains a rule table according to the feature information of the packet and the forwarding port corresponding to the feature information. The rule table describes the feature information of the packet to be matched and the corresponding forwarding port relationship. There are two points to be explained: First, the system will determine the legality of the command issued by the user, for example, whether the field is legal, whether the port belongs to the aggregation port, etc. If it is not legal, the user will be reminded that the input is invalid. Second, the message field includes the source media access control mac. Address (source mac, smac), destination mac (destination mac, dmac), virtual LAN ID vlan id information.

In an optional embodiment, when the packet further carries the forwarding port information corresponding to the feature information, when the forwarding port is unique, the packet is forwarded according to the forwarding port corresponding to the feature information; When the port is not unique, the packet is forwarded by selecting a forwarding port from the forwarding port according to a hash algorithm.

Optionally, the packet forwarding method further includes: if the forwarding port information corresponding to the feature information is not found in the preset rule table, forwarding the packet according to the hash algorithm.

If the user does not enter any command, the rule table defaults to an empty table. When the packet is forwarded through the aggregation port, the system uses the default load balancing mode to forward packets.

When packets are forwarded through the aggregation port, the device extracts the required packet fields and then searches for the matching table according to these fields. If they match, they are forwarded from the corresponding port. If they do not match, load balancing is performed according to the hash algorithm result. It should be noted that the network communication device has multiple load sharing modes, and each load sharing mode has a corresponding hash algorithm.

Optionally, in the case that the forwarding table carries the forwarding speed information of the forwarding port, the forwarding port corresponding to the feature information forwards the packet at the forwarding speed of the forwarding port, so that important packets can be Faster speed forwarding.

The embodiment of the present invention further provides a packet forwarding device applied to the field of link aggregation, and FIG. 3 is a block diagram of a packet forwarding device of an aggregated link according to an embodiment of the present invention, as shown in FIG. :

The receiving module 32 is configured to receive a packet, where the packet carries the feature information of the packet;

The querying module 34 is configured to query the forwarding port information corresponding to the feature information from a preset rule table if the packet does not carry the forwarding port information corresponding to the feature information;

The first forwarding module 36 is configured to forward the packet according to the forwarding port corresponding to the feature information when the packet further carries the forwarding port information corresponding to the feature information; or, the packet does not carry the feature information. In the case of forwarding port information, the packet is forwarded according to the forwarding port corresponding to the feature information queried from the preset rule table.

Optionally, the first forwarding module 36 is configured to forward the packet according to the forwarding port corresponding to the feature information when the forwarding port is unique; and forward the packet according to a hash algorithm when the forwarding port is not unique A forwarding port selected in the port forwards the packet.

Optionally, the first forwarding module 36 is further configured to: when the forwarding table carries the forwarding speed information of the forwarding port, the forwarding port corresponding to the feature information forwards the packet at the forwarding speed of the forwarding port.

FIG. 4 is a block diagram 2 of a packet forwarding device of an aggregated link according to an alternative embodiment of the present invention. As shown in FIG. 4, the packet forwarding device further includes a maintenance module 42 configured to carry a feature in the packet. In the case of the forwarding port information corresponding to the information, the forwarding port information corresponding to the feature information and the feature information is recorded in the rule table.

FIG. 5 is a block diagram 3 of a packet forwarding device of an aggregated link according to an alternative embodiment of the present invention. As shown in FIG. 5, the packet forwarding device further includes a second forwarding module 52, which is set to not query and In the case of forwarding port information corresponding to the feature information, the packet is forwarded according to a hash algorithm.

In the embodiment of the present invention, a specific packet can be forwarded through a specific port of the aggregation link, and other packets are forwarded according to normal load sharing, so that important packets can be forwarded reliably and efficiently.

FIG. 6 is a flowchart of a method for specifying a packet forwarding port in a link aggregation port according to an embodiment of the present invention. As shown in FIG. 6, the method includes:

Step S602, obtaining a user configuration instruction, for example, the user inputs the following configuration instructions:

Link-aggregation smac=00:12:34:56:11:22 vlanid=3 port=2;

Link-aggregation dmac=00:34:33:44:55:66 vlanid=2 port=3;

Link-aggregation vlanid=10 port=1,2;

The meanings of the above three orders are as follows:

The first command is to forward the packet from port 2 when the source smac of the packet passing through the aggregation port is 00:12:34:56:11:22 and the vlan id is equal to 3.

The second command is to forward the packet from port 3 when the destination dmac of the packet passing through the aggregation port is 00:34:33:44:55:66 and the vlan id is equal to 2.

The third command is that when the vlanid of the packets passing through the aggregation port is 10, the packet can be forwarded by selecting one of the port and the port.

Step S604, the device determines that the instruction is legal when acquiring the instruction, and then writes the feature information of the three instructions and the forwarding port information corresponding to the feature information into the rule table, as shown in Table 1.

Table 1 Rule table:

smacSmac	dmacDmac	vlan idVlan id	portPort
00:12:34:56:11:2200:12:34:56:11:22	00	33	22
00	00:34:33:44:55:6600:34:33:44:55:66	22	33
00	00	1010	1，21,2

In step S606, when the packets in the system pass the aggregation port, the entries in the search rule table are first polled, and when an entry is matched, the port corresponding to the entry is forwarded; if no entry is matched, Load sharing is performed according to the hash algorithm.

For example, if the dmac of a packet is 00:34:33:44:55:66 and the vlan id is 2, the packet command carries the feature information of the packet, but does not carry the forwarding port corresponding to the feature information. If the information recorded in the rule table is found, it is found that the forwarding port corresponding to the packet feature is port 3, and then the packet is forwarded according to the information recorded in the rule table.

If a message has vlan=10, the command carries the feature information of the packet, but does not carry the forwarding port corresponding to the feature information. At this time, the information recorded in the rule table is found, and the forwarding port matching the packet feature is found to be Two, so according to the hash algorithm, the final forwarding port of the packet is further determined, and the packet is forwarded;

In other cases, if a packet does not carry the forwarding port of the packet feature information, and the rule table does not have a matching forwarding port, the packet is forwarded according to the hash algorithm.

7 is a block diagram 1 of a device for specifying a packet forwarding port in a link aggregation port according to an embodiment of the present invention, including:

The obtaining module 72 is configured to obtain a user configuration instruction, and determine the legality of the instruction issued by the user, and if not, prompt the user to re-enter.

The maintenance module 74 is configured to maintain and update the rules table in accordance with instructions entered by the user.

The processing module 76 is configured to perform forwarding processing on the packet passing the aggregation port. FIG. 8 is a block diagram 2 of the device for specifying a packet forwarding port in the link aggregation port according to the embodiment of the present invention. The processing module 76 includes the following sub-menets. Module:

The parsing sub-module 82 is configured to parse the message and extract the required fields from the message.

The query sub-module 84 is configured to query the rule table according to the field parsed by the parsing sub-module 82.

The first forwarding sub-module 86 is configured to forward the packet according to the corresponding port in the rule table when the query sub-module 84 matches the entry that matches the packet from the rule table.

The second forwarding sub-module 88 is configured to perform packet forwarding according to the hash algorithm when the query sub-module 84 does not match any entry that matches the packet from the rule table.

The function of the obtaining module 72 corresponds to the function of the receiving module 32. The function of the maintenance module 74 corresponds to the function of the maintenance module 42. The function of the processing module 76 corresponds to the querying module 34, the first forwarding module 36, and the second forwarding module 52. The function.

The embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented by the processor to implement the method described in the foregoing embodiments.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description It does not necessarily correspond to the division of physical units; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules, or other data. , removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media.

The above is only an alternative embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Industrial applicability

The above-mentioned technical solution allows a specific packet to be forwarded through a specific port of the aggregation link, and the other packets are forwarded according to the normal load sharing, so that important packets can be forwarded reliably and efficiently.

Claims

A packet forwarding method is applied to the field of link aggregation, including the steps:

Receiving a message, wherein the message carries feature information of the message (S202);

If the packet further carries the forwarding port information corresponding to the feature information, the packet is forwarded according to the forwarding port corresponding to the feature information (S204); or

If the packet does not carry the forwarding port information corresponding to the feature information, query the forwarding port information corresponding to the feature information from a preset rule table; and query the forwarding port corresponding to the feature information. In the case of information, the message is forwarded according to the forwarding port corresponding to the feature information (S206).
The message forwarding method according to claim 1, wherein

And if the packet further carries the forwarding port information corresponding to the feature information, forwarding the packet according to the forwarding port corresponding to the feature information (S204) includes:

When the forwarding port corresponding to the feature information is unique, the packet is forwarded according to the forwarding port corresponding to the feature information; when the forwarding port corresponding to the feature information is not unique, the forwarding port is used according to a hash algorithm. A forwarding port is selected to forward the message.
The packet forwarding method according to claim 1 or 2, wherein, in the case that the packet further carries the forwarding port information, the method further includes:

Forwarding port information corresponding to the feature information and the feature information is recorded in the rule table.
The packet forwarding method of claim 1, the method further comprising:

If the forwarding port information corresponding to the feature information is not queried, the packet is forwarded according to a hash algorithm.
The packet forwarding method of claim 3, wherein forwarding the message according to the forwarding port corresponding to the feature information comprises:

When the forwarding table carries the forwarding speed information of the forwarding port, the forwarding port corresponding to the feature information forwards the packet at the forwarding speed.
The packet forwarding method according to claim 4 or 5, wherein the feature information is a newspaper The source media access control MAC address, destination Mac address, virtual local area network identity VLAN id, quality of service QoS information.
A packet forwarding device is applied to the field of link aggregation, including:

The receiving module (32) is configured to receive a packet, where the packet carries the feature information of the packet;

The query module (34) is configured to query the forwarding port information corresponding to the feature information from a preset rule table if the packet does not carry the forwarding port information corresponding to the feature information;

The first forwarding module (36) is configured to: when the packet further carries the forwarding port information corresponding to the feature information, forward the packet according to the forwarding port corresponding to the feature information; or If the packet does not carry the forwarding port information corresponding to the feature information, the packet is forwarded according to the forwarding port corresponding to the feature information that is queried from the preset rule table.
The packet forwarding device according to claim 7, wherein the first forwarding module (36) is configured to implement, in a manner that the packet further carries forwarding port information corresponding to the feature information, Forwarding the packet according to the forwarding port corresponding to the feature information:

When the forwarding port corresponding to the feature information is unique, the packet is forwarded according to the forwarding port corresponding to the feature information; when the forwarding port corresponding to the feature information is not unique, the forwarding port is used according to a hash algorithm. A forwarding port is selected to forward the message.
The message forwarding device of claim 7 or 8, the device further comprising:

The maintenance module (42) is configured to record the forwarding port information corresponding to the feature information and the feature information to the rule table, if the packet further carries the forwarding port information corresponding to the feature information. in.
The message forwarding device of claim 7, the device further comprising:

The second forwarding module (52) is configured to forward the packet according to the hash algorithm if the forwarding port information corresponding to the feature information is not queried.
A message forwarding device according to claim 9,

The first forwarding module (36) is further configured to: when the forwarding table carries the forwarding speed information of the forwarding port, the forwarding port corresponding to the feature information is forwarded by the forwarding port Speed forwards the message.
A computer readable storage medium storing computer executable instructions that, when executed by a processor, implement the method of any one of claims 1 to 6.