Active-active PBB-EVPN redundant traffic black hole avoidance and fast convergence

Abstract

The present invention relates to traffic black hole avoidance and rapid integration of active-active PBB-EVPN redundancy. In one example, a method includes configuring a first Provider Edge (PE) router of a Provider Backbone Bridging (PBB) Ethernet Virtual Private Network (EVPN) to join an Ethernet network in active-active mode with at least a second PE router. network segment for which the second PE router operates as the designated forwarder for the Ethernet segment; by the first PE router from the remote PE router and at the first PE router pair via the Backbone MAC (B-MAC) associated with the Ethernet segment receiving a network packet including the C-MAC address prior to performing Media Access Control (MAC) learning on the address-reachable Customer MAC (C-MAC) address; and in response to determining that the C-MAC address has not been learned by the first PE router And it is determined that the B-MAC address included in the network data packet is associated with the Ethernet segment, and the first PE router forwards the network data packet to the destination identified by the C-MAC address.

Description

technical field [0001] The present invention relates to computer networks, and more particularly, to forwarding network traffic within computer networks. Background technique [0002] Ethernet Virtual Private Network (EVPN) can be used to transparently extend two or more remote Layer 2 (L2) customer networks through an intermediate Layer 3 (L3) network (often referred to as a provider network) , i.e. as if the intermediate L3 network does not exist. Specifically, EVPN transports L2 communications, such as Ethernet packets or "frames," between customer networks via an intermediate network. In a typical configuration, provider edge (PE) network devices (e.g., routers and / or switches) coupled to customer edge (CE) network devices of the customer network define label switched paths (LSPs) within the provider network. (also known as a pseudowire) to conduct encapsulated L2 communications as if these customer networks were directly attached to the same local area network (LAN). ...

AI Technical Summary

Problems solved by technology

While the remote PE router may have learned the destination customer MAC (C-MAC), causing the remote PE router to send network packets as known unicast traffic, this particular PE router may not have learned the C-MAC address

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