WO2008119289A1

WO2008119289A1 - Method and device for sending mac

Info

Publication number: WO2008119289A1
Application number: PCT/CN2008/070560
Authority: WO
Inventors: Yu Fan
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-03-30
Filing date: 2008-03-21
Publication date: 2008-10-09
Also published as: CN101277254B; CN101277254A

Abstract

A method and device for sending Mac, belonging to telecommunication field, are provided. For solving the problem of Customer Mac transmitted into a provider backbone bridging, a method for sending Mac: creating a table of provider net tunnel at the Entry Provider Edge, and binding a table of provider net tunnel to Customer service examples; after Entry Provider Edge receives the C-MAC, packaging the C-MAC according to the B-MAC bound by the Customer service examples of the Customer, and sending the packet C-MAC to the provider net to be transmitted, is provided. A device for sending MAC is also provided, which comprises: table creating module, binding module, package module, and retransmission module. It can assign the net effectively, and reduce the broadcasting message that is broadcasted in backbone.

Description

Method and device for transmitting message

The present invention relates to the field of communications, and in particular, to a method and apparatus for transmitting a message. Background art

The Mac-in-Mac technology isolates the carrier network from the customer network by adding the carrier's B-MAC (Backbone MAC) address. When the user's Layer 2 packet arrives at the edge of the carrier backbone network, The C-MAC (Customer MAC) address of the user packet, the S-TAG (Extended Service TAG) is mapped to the B-MAC address of the carrier network, and the B-TAG (Backbone TAG - Backbone Service) Label), and encapsulate the corresponding B-MAC address, B-TAG, I-TAG (Instant TAG-service instance label) on the user packet, and the encapsulated user packet is in accordance with the B-MAC address and B-TAG. Transmitted within the carrier network. The mapping between user packets (C-MAC, S-TAG) and carrier network (B-MAC, B-TAG) can be established through static configuration and dynamic learning. Dynamic learning is based on traditional two. The MAC address learning function of the layer packet obtains the mapping relationship between (C-MAC, S-TAG) and (B-MAC, B-TAG). As shown in Figure 1, during dynamic learning, the operator edge device PEA ( Provider Edge A) After receiving the packet sent by the user edge device CEl (Customer Edge 1), if the user C-MAC address forwarding table is not found, the S-TAG and B-TAG are in accordance with the Mac-in-Mac encapsulation format. The broadcast MAC address is encapsulated in front of the original Layer 2 packet header and broadcast in the B-VLAN (Virtual LAN-Virtual Local Area Network) corresponding to the B-TAG. In the actual network, the mapping between the user and the backbone network is established through dynamic learning. The operator lacks the monitoring of user packets and the possibility of network planning.

In the current state of the art, an operator can deploy a static MAC tunnel based on (B-MAC, B-TAG, outbound interface) between PEs, and the intermediate device configuration in the backbone network is based on (B-MAC, B-TAG). The static MAC forwarding table binds the user packet to the static MAC tunnel between the PEs, so that the user packet will be forwarded along the static MAC tunnel. However, this scheme combines the tunnel establishment mode between PEs and the user-to-B-MAC (B-TAG) mapping relationship too tightly, whether for P2P service instances (Peer-to-Peer-point-to-point) or MP2MP (Multi). Peer-to-Multi Peer-multi-point Peer-to-multiple-point service applications require static configuration of MAC tunnels and MAC forwarding tables throughout the entire network. The configuration volume becomes very complicated as the network size increases. Summary of the invention

In order to solve the problem that the user packet is transmitted on the carrier backbone network, the embodiment of the present invention provides a method for sending a packet, where the method includes:

Establishing a carrier network tunnel list on the ingress operator edge device, and binding the carrier network tunnel list with the user service instance;

After receiving the user packet, the ingress operator edge device encapsulates the user packet according to the operator network tunnel list bound by the user service instance to which the user belongs, and sends the encapsulated user packet to the user packet. Transmitted on the carrier network.

An embodiment of the present invention further provides an apparatus for sending a message, where the apparatus includes:

a list establishing module, configured to establish a carrier network tunnel list on the ingress operator edge device;

a binding module, configured to bind the operator network tunnel list established by the list establishing module to the user service instance; and the encapsulating module, configured to receive the user packet, and according to the operation bound to the user service instance to which the user belongs a merchant network tunnel list, which encapsulates the user packet;

The forwarding module is configured to send the encapsulated user packet to the carrier network for transmission.

The beneficial effects of the embodiments of the present invention: The embodiments of the present invention enable the operator to flexibly deploy the mapping relationship between the user packets and the network tunnel list of the operator according to the actual application, thereby effectively planning the network and reducing the number of users. The broadcast packets caused by the text are transmitted on the carrier backbone network. DRAWINGS

1 is a schematic diagram of a typical networking of a Mac-in-Mac in the prior art;

2 is a flowchart of a method for sending a message according to an embodiment of the present invention;

FIG. 3 is a structural diagram of an apparatus for transmitting a message according to an embodiment of the present invention. detailed description

The invention will be further described with reference to the accompanying drawings and specific embodiments, but not to be construed as limiting.

In the embodiment of the present invention, a carrier network tunnel (B-MAC, B-TAG) list is configured to specify a user packet (C-MAC, S-TAG) and a carrier network tunnel (B). -MAC, B-TAG) mapping, so that user packets are forwarded.

Referring to FIG. 2, the method for sending a message according to the embodiment of the present invention specifically includes the following steps:

Step 101: Establish a carrier network tunnel (B-MAC, B-TAG) list on the ingress operator edge PE device. Bind this (B-MAC, B-TAG) list to the User Service Instance (I-TAG).

User service instances include P2P type service instances and MP2MP type service instances. There is a set of B-MAC addresses and B-TAGs in the (B-MAC, B-TAG) list bound to the P2P type service instance; (B-MAC, B-TAG) list bound to the MP2MP type service instance There is at least one set of B-MAC address and B-tag, but the B-MAC address of each group and the B-MAC address of the B-tag cannot be duplicated. If the configuration is incorrect, the edge PE device of the carrier prompts a configuration error alarm.

Step 102: After receiving the user packet, the PE device encapsulates the user packet according to the type of the user service instance to which the user belongs, and sends the encapsulated user packet to the carrier network for transmission.

The ingress operator edge PE device performs different encapsulation processing on the received user packets according to the type of the user service instance to which the user belongs:

1. For a P2P service instance, the ingress carrier edge PE device looks up the (B-MAC, B-TAG) list bound to the P2P type service instance, according to the found (B-MAC, B-TAG) list. The B-MAC address and the B-TAG encapsulate the user packet into the Mac-in-Mac packet header. In the encapsulation process, the I-TAG needs to be encapsulated in the packet header, and then the encapsulated packet is encapsulated. The B-MAC address and the B-tag address are searched for the B-MAC address forwarding table, and the encapsulated packet is sent to the carrier network for transmission according to the found outbound interface.

2. For an MP2MP-type service instance, because the service instance is multi-point-to-multipoint, there may be multiple groups (B-MAC, B-TAG) in the corresponding (B-MAC, B-TAG) list. The POS PE device searches the C-MAC address forwarding table according to the C-MAC address in the user packet. If the C-MAC forwarding table has an entry matching the C-MAC address, the C-MAC forwarding table is used. The information in the matched entry (including the specified group (B-MAC, B-TAG) to forward the user packet. If the user packet is to be forwarded through the carrier network, it is matched according to the C-MAC forwarding table. The corresponding (B-MAC, B-TAG) in the entry encapsulates the user packet with the Mac-in-Mac packet header, and searches the B-MAC address forwarding table according to the B-MAC address in the encapsulated packet. The outgoing interface sends the encapsulated packet to the carrier network for transmission. If the corresponding C-MAC address forwarding table is not found, the corresponding multiple groups in the corresponding (B-MAC, B-TAG) list are obtained. (B-MAC, B-TAG) Copy multiple user packets, copy the number of packets and the corresponding (B-MAC, B-TAG) list (B-MAC, B-TAG) The number of groups is the same. Each group of B-MAC addresses and B-TAGs in the (B-MAC, B-TAG) list are individually packaged into each copied user message Mac-in-Mac message. In the header, in the process of encapsulation, the I-TAG needs to be encapsulated in the packet header. The B-TAG and the I-TAG form the virtual local area network information, and the packets are encapsulated according to the B-MAC address and the B-TAG. The corresponding outgoing interface is sent to the carrier network for transmission.

Step 103: After receiving the encapsulated user packet, the egress edge edge PE device decapsulates the user packet and forwards the packet to the client edge CE device according to the destination MAC address of the user packet. In this embodiment, the operator can flexibly deploy the mapping between the user packet and the B-MAC (B-TAG) according to the actual application, thereby effectively planning the network and reducing the broadcast packet caused by the user packet on the backbone network. propagation.

Further, in the service instance application of the MP2MP type, an ACL (Access Control List-based access control) based on user information such as C-MAC and S-TAG may be established while establishing a (B-MAC, B-TAG) list. Table) Filtering policy, so that you can flexibly control which group (B-MAC, B-TAG) encapsulation should be in accordance with the (B-MAC, B-TAG) list: The ingress operator edge PE device will report the user. The ACL is matched with the ACL filtering policy. If the user packet meets the rules defined by the ACL filtering policy, the ingress operator edge PE device reports the user according to the corresponding B-MAC (B-TAG) in the rule defined by the ACL filtering policy. If the user packet does not meet the rules defined by the ACL filtering policy, the ingress operator edge PE device searches for the corresponding C-MAC address forwarding table according to the C-MAC address in the user packet, and searches for the C-MAC according to the C-MAC address. The result of the address forwarding table encapsulates the user packet, and the specific encapsulation method is the same as that described in step 102 of step 102, and details are not described herein.

In addition, the user sometimes wants the user traffic under the P2P service instance or the MP2MP service instance to learn the MAC address forwarding table by itself, so that the user packet encapsulated by the Mac-in-Mac header can be broadcast and sent to the backbone network. On the PE, the outer MAC address of the encapsulation is the broadcast MAC address. For this type of application, you can configure the B-MAC address as the broadcast MAC address in the (B-MAC, B-TAG) list. After the (B-MAC, B-TAG) list is found, the destination MAC address is the broadcast MAC address, and the packet is encapsulated and sent according to the existing broadcast sending process.

Referring to FIG. 3, an embodiment of the present invention further provides an apparatus for sending a message, where the apparatus includes:

a list establishing module 301, configured to establish a carrier network tunnel list on the ingress operator edge device;

The binding module 302 is configured to bind the operator network tunnel list established by the list establishing module 301 to the user service instance;

The encapsulating module 303 is configured to receive a user packet, and encapsulate the user packet according to the operator network tunnel list bound to the user service instance to which the user belongs.

The forwarding module 304 is configured to send the encapsulated user packet to the carrier network for transmission.

In an embodiment of the present invention, the encapsulation module 303 includes:

a receiving unit, configured to receive a user message;

The determining unit is configured to determine, according to the user packet received by the receiving unit, a user service instance to which the user belongs, where the user service instance includes a point-to-point service instance and a multi-point to multi-point service instance;

a first encapsulation processing unit, configured to: when the judging unit determines that the user service instance to which the user belongs is a peer-to-peer service instance, encapsulating the user packet according to the operator network tunnel list bound by the peer-to-peer service instance; a second encapsulation processing unit, configured to: when the judging unit determines that the user service instance to which the user belongs is a multi-point to multi-point service instance, search for a C-MAC address forwarding table according to the C-MAC address of the user packet; If there is no entry in the C-MAC address forwarding table that matches the C-MAC address, multiple user packets are obtained by copying the user packet, according to the operator bound to the multipoint-to-multipoint service instance. All B-MAC addresses and B-TAGs in the network tunnel list encapsulate multiple user packets one by one; otherwise, according to the B-MAC address and B-TAG pair corresponding to the C-MAC address in the C-MAC address forwarding table The user message is encapsulated.

The specific processing procedure of the first encapsulation processing unit is the same as the processing procedure described in step 102 of the first embodiment. The specific processing procedure of the second encapsulation processing unit is the same as the processing procedure described in step 102 of the first embodiment. It will not be detailed here.

In another embodiment of the present invention, the apparatus may further include: a filtering policy establishing module, configured to establish a filtering policy of the user information on the ingress operator edge device;

Correspondingly, the binding module 302 is further configured to bind the filtering policy established by the filtering policy establishing module to the user service instance.

When the device includes a filtering rule establishing module, in another embodiment of the present invention, the encapsulating module 303 includes: a receiving unit, configured to receive a user message;

a determining unit, configured to determine, according to the user packet received by the receiving unit, a user service instance to which the user belongs, where the user service instance includes a point-to-point service instance and a multi-point to multi-point service instance;

a matching unit, configured to: when the determining unit determines the user service instance to which the user belongs, matching the user message received by the receiving unit with the filtering policy established by the filtering policy establishing module;

The encapsulation processing unit is configured to perform encapsulation processing on the user packet received by the receiving unit according to the matching result of the matching unit.

The specific processing procedure of the encapsulation processing unit is the same as the encapsulation processing procedure after the ACL filtering policy based on the user information of the C-MAC address and the S-TAG is the same in the first embodiment, and will not be described in detail herein.

In this embodiment, the carrier network tunnel list and the user service instance are configured by the binding module, so that the operator can flexibly deploy the mapping relationship between the user packet and the operator network tunnel list, thereby effectively planning the network and reducing the number of users. The broadcast packets caused by the text are transmitted on the carrier backbone network.

The software involved in the embodiments of the present invention may be stored in a computer readable storage medium. The embodiments described above are only preferred embodiments of the present invention, and the usual changes and substitutions made by those skilled in the art within the scope of the present invention are included in the scope of the present invention.

Claims

Claim

A method for sending a message, the method comprising:

The method for sending a message according to claim 1, wherein the user service instance comprises a peer-to-peer service instance and a multi-point to multi-point service instance.

The method for transmitting a packet according to claim 1, wherein the encapsulating the user packet according to the operator network tunnel list bound by the user service instance to which the user belongs includes:

If the user service instance to which the user belongs is a peer-to-peer service instance, the ingress carrier edge device searches for a list of the operator network tunnel bound to the point-to-point service instance, and lists the carrier network tunnel bound according to the point-to-point service instance. The backbone network MAC address and the backbone network service label encapsulate the carrier network packet header for the user packet.

If the user service instance to which the user belongs is a multi-point to multi-point service instance, the ingress operator edge device searches for a C-MAC address forwarding table according to the user MAC address of the user packet;

If the entry in the C-MAC address forwarding table does not match the user MAC address, the ingress operator edge device obtains the plurality of the user packets by copying the user packet, according to the All the backbone network MAC addresses and the backbone network service labels in the carrier network tunnel list bound to the multi-point service instance, and the operator network packet headers are encapsulated one by one for the plurality of user packets;

If the C-MAC address forwarding table has an entry matching the user MAC address, the ingress operator edge device forwards the corresponding backbone network MAC address and the backbone network service according to the C-MAC address forwarding table. The label encapsulates the operator network packet header for the user packet.

The method for transmitting a message according to claim 1, wherein the method further comprises: establishing a filtering policy of user information on the edge operator edge device;

Binding the filtering policy to the user service instance.

The method for transmitting a packet according to claim 5, wherein the encapsulating the user packet according to the operator network tunnel list bound by the user service instance to which the user belongs includes:

If the user service instance to which the user belongs is a multi-point to multi-point service instance, the ingress operator edge device matches the user packet with the filtering policy, if the user packet satisfies the filtering policy a defined rule, the ingress operator edge device encapsulates the user packet according to a rule defined by the filtering policy; if the user packet does not satisfy the rule defined by the filtering policy, the portal The operator edge device searches for a C-MAC address forwarding table according to the user MAC address of the user packet.

If the C-MAC address forwarding table does not have an entry that matches the user MAC address, the ingress operator edge device obtains a plurality of the user packets by copying the user packet, according to the multiple All the backbone network MAC addresses and the backbone network service labels in the carrier network tunnel list bound by the point-to-multipoint service instance, and the operator network packet headers are encapsulated one by one for the plurality of user packets;

A device for transmitting a message, the device comprising:

The device for transmitting a message according to claim 7, wherein the encapsulating module comprises: a receiving unit, configured to receive a user message;

a determining unit, configured to determine, according to the user packet received by the receiving unit, a user service instance to which the user belongs; the first encapsulating processing unit, configured to: when the determining unit determines that the user service instance to which the user belongs is a point-to-point service In the case of the service, the user packet is encapsulated according to the carrier network tunnel list bound by the peer-to-peer service instance; the second encapsulation processing unit is configured to determine, when the determining unit, the user service instance to which the user belongs If the multi-point to multi-point service instance is used, the C-MAC address forwarding table is searched according to the user MAC address of the user packet; if the C-MAC address forwarding table does not have an entry matching the user MAC address, Obtaining, by copying the user packet, a plurality of the user packets, according to all backbone network MAC addresses and backbone service tags in the operator network tunnel list bound to the multipoint-to-multipoint service instance, one by one The plurality of user packets are encapsulated; otherwise, the user packet is encapsulated according to the backbone network MAC address and the backbone network service label corresponding to the user MAC address in the C-MAC address forwarding table.

The device for transmitting a message according to claim 7, wherein the device further comprises:

A filtering policy establishing module is configured to establish a filtering policy for user information on the ingress operator edge device.

The apparatus for transmitting a message according to claim 9, wherein the binding module is further configured to bind the filtering policy established by the filtering policy establishing module to the user service instance.

The apparatus for transmitting a message according to claim 10, wherein the encapsulating module comprises: a receiving unit, configured to receive a user message;

a determining unit, configured to determine, according to the user packet received by the receiving unit, a user service instance to which the user belongs; and a matching unit, configured to: when the determining unit determines that the user service instance to which the user belongs is multi-to-many When the service instance is selected, the user message received by the receiving unit is matched with the filtering policy established by the filtering policy establishing module; the encapsulating processing unit is configured to: according to the matching result of the matching unit, the receiving unit The received user packet is encapsulated.