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Method and device for forwarding data message

A data message and purpose technology, applied in the field of communication, can solve the problems of high cost of 802.1ah, less deployment of 802.1ah, etc., and achieve the effect of reducing memory and processor pressure

Active Publication Date: 2021-07-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The data packet encapsulation format of the existing PBB EVPN is the packet format with 802.1ah PBB header defined in RFC7623. However, the original 802.1ah itself is rarely deployed, and the cost of implementing 802.1ah for PBB EVPN is relatively high.
[0006] Existing technical solutions for making SPE nodes unaware of user MAC entries in large-scale hierarchical L2EVPN networks either need to add PBB encapsulation to packets, or add VXLAN encapsulation to packets. The technical solution that the SPE node in the hierarchical L2EVPN network does not perceive the user MAC entry does not exist in the prior art.

Method used

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  • Method and device for forwarding data message

Examples

Experimental program
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Embodiment 1

[0152] figure 2 It is a flow chart of a method for forwarding data packets provided by an embodiment of the present invention, such as figure 2 shown, including:

[0153] Step S101: The terminal operator edge device TPE1 receives the MPLS-encapsulated EVPN data packet MEDP1 containing the label stack, wherein the MEDP1 encapsulates the Ethernet data packet EDP1, and the source MAC of the EDP1 is MAC1;

[0154] Step S102: The TPE1 determines the node identifier of the remote ingress TPE to which the MEDP1 belongs or the value ESI1 of the remote ingress ESI according to the label stack in the MEDP1, wherein the remote ingress TPE is the Encapsulated as a remote TPE2 node of MEDP1, the remote ingress ESI corresponding to the MEDP1 is the ESI to which the AC used by the TPE2 node to receive the EDP1 belongs;

[0155] Wherein, the TPE1 uses the remote ingress ESI for at least one of the following purposes:

[0156] When the remote ingress ESI of the MEDP1 is a specified value ...

Embodiment 2

[0166] The embodiment of the present invention also provides a method for forwarding data packets, including:

[0167] Termination point operator edge device TPE3 obtains unicast Ethernet data packet EDP3 from access circuit AC3, wherein said AC3 belongs to Ethernet segment identifier ESI3 and said AC3 is bound to Ethernet virtual private network EVPN broadcast domain BD1, so The destination MAC of EDP3 is MAC2;

[0168] The TPE3 finds the corresponding destination ESI4 or destination TPE5 with the binary group as a key value, and performs multi-protocol label switching MPLS encapsulation processing accordingly to generate a local entry ESI label , the context identifier label stack element LSE and the MPLS-encapsulated EVPN data packet MEDP3 of the multipoint-to-point MP2P outgoing label corresponding to the destination ESI or the destination TPE, and the context identifier LSE carries the information of the source node identifier;

[0169] The TPE3 forwards the MEDP3 to th...

Embodiment 3

[0183] The embodiment of the present invention also provides a method for routing message forwarding, including:

[0184] The switching point operator edge device SPE1 receives the EAD-ES route sent by TPE1 and carries the original ESI label and the next-hop ESI label, and performs route reflection in the way of replacing the next hop on the EAD-ES route, and rewrites the next-hop ESI label without rewriting the original ESI label.

[0185] Wherein, the new next-hop ESI label used for rewriting the next-hop ESI label conforms to the following rules: the new next-hop ESI label is a label of a downstream distribution mode, and is allocated by the SPE1 node; The new next-hop ESI label and the original next-hop ESI label form a label exchange operation on the forwarding plane, wherein the new next-hop ESI label is an incoming label, and the original next-hop ESI label is an outgoing label.

[0186] Through the description of the above embodiments, those skilled in the art can cle...

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Abstract

The present invention discloses a method and device for forwarding data packets, which relate to the field of communication technology. The method comprises: an edge equipment TPE1 of a termination point operator receives an MPLS-encapsulated EVPN data packet MEDP1 containing a label stack, wherein the MEDP1 encapsulates Ethernet data packet EDP1, the source MAC of the EDP1 is MAC1; the TPE1 determines the node identifier of the remote entrance TPE to which the MEDP1 belongs or the value ESI1 of the remote entrance ESI according to the label stack in the MEDP1, Wherein, the remote ingress TPE is the remote TPE2 node that encapsulates the EDP1 as MEDP1, and the remote ingress ESI corresponding to the MEDP1 is the ESI to which the AC used by the TPE2 node to receive the EDP1 belongs.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for forwarding data messages. Background technique [0002] MPLS EVPN defined by RFC7432 must perceive user MAC entries on SPE nodes, because TPEs need to publish user MAC entries to each other. However, it is not practical to directly establish BGP sessions between TPEs in large EVPN networks because TPEs The number is large. Assuming that the number of TPEs is N, the number of required BGP sessions is the second power of N. A more practical approach is to figure 1 As shown in the figure, TPE only establishes BGP sessions with a few nearby SPEs, and BGP sessions are established between SPEs in pairs. Since the number of SPEs is much smaller than that of TPEs, this greatly reduces the number of BGP sessions required in the EVPN network. But this also makes the SPE aware of the user MAC entries and redistribute the user MAC entries from one TPE to other TPEs or SPE...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/723H04L12/46H04L45/50
CPCH04L45/50H04L12/4641H04L12/46
Inventor 王玉保
Owner ZTE CORP
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