Virtual Router Redundancy Protocol; Vrrp Guidelines - Avaya 8800 Planning And Engineering

The following figure shows inter-VRF forwarding. In this solution, routing policies can be used to
leak IP subnets from one VRF to another. Filters can be used to restrict access to certain
protocols. This enables hub-and-spoke network designs for, for example, VoIP gateways.
Figure 40: Inter VRF communication, internal inter-VRF forwarding

Virtual Router Redundancy Protocol

The Virtual Router Redundancy Protocol (VRRP) provides a backup router that takes over if
a router fails. This is important when you must provide redundancy mechanisms. To configure
VRRP so that it works correctly, use the information in the following sections.
VRRP navigation
•

VRRP guidelines

• VRRP and STG
• VRRP and ICMP redirect messages
• IPv6 VRRP
• VRRP versus RSMLT for default gateway resiliency
VRRP guidelines
VRRP provides another layer of resiliency to your network design by providing default gateway
redundancy for end users. If a VRRP-enabled router connected to the default gateway fails,
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Virtual Router Redundancy Protocol

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