DvR-VRRP Coexistence

When a Layer 2 Virtual Service Network (VSN) extends outside of the Distributed Virtual Routing (DvR) domain, DvR Controllers can route traffic that enters on the network-to-network interface (NNI) by using Virtual Router Redundancy Protocol (VRRP) to advertise the DvR gateway MAC in Layer 2 VSN.

The primary Virtual Router Redundancy Protocol (VRRP) router, in this case, a DvR Controller, sends VRRP advertisements on the DvR-election VLAN using the VRRP gateway MAC as the source and a unique nickname-derived IP address as the source​ IP. The primary VRRP router sends VRRP advertisements on all other DvR VLANs using the VRRP gateway MAC as the source​ and the configured interface IP address as the source IP. The primary or backup VRRP routers process VRRP advertisements only on the selected VRRP election VLAN/I-SID. (The primary VRRP router is sometimes referred to as the master.)

Note

Note

The VRRP gateway MAC is the same as the DvR gateway MAC.

Non-DvR Backbone Edge Bridges (BEBs) learn the gateway MAC from the advertisements and encapsulate packets destined to the DvR gateway MAC with the primary VRRP router backbone MAC (BMAC) destination address. The primary VRRP router routes the packets to the destination.

The destination IP address can be any of the following:

Restrictions

DvR-VRRP Coexistence has the following restrictions: