Chapter 10: Layer 3 Network Design; Vrf Lite; Vrf Lite Route Redistribution - Avaya 8800 Planning And Engineering

Chapter 10: Layer 3 network design

This section describes some Layer 3 design considerations that you need to be aware of to properly design
an efficient and robust network.
Navigation
• VRF Lite
• Virtual Router Redundancy Protocol
• Subnet-based VLAN guidelines
• PPPoE-based VLAN design example
• Border Gateway Protocol
• Open Shortest Path First
• IP routed interface scaling
• Internet Protocol version 6

VRF Lite

Release 7.0 supports the Virtual Router Forwarding (VRF) Lite feature, which supports many
virtual routers, each with its own routing domain. VRF Lite virtualizes the routing tables to form
independent routing domains, which eliminates the need for multiple physical routers.
To use VRF Lite, you must install the Premier Software License.
VRF Lite fully supports the High Availability feature. Dynamic tables built by VRF Lite are
synchronized. If failover occurs when HA is enabled, VRF Lite does not experience an
interruption.
For more information about VRF Lite, see Avaya Ethernet Routing Switch 8800/8600
Configuration - IP Routing, NN46205-523.

VRF Lite route redistribution

Using VRF Lite, the Avaya Ethernet Routing Switch 8800/8600 can function as many routers;
each Virtual Router and Forwarder (VRF) autonomous routing engine works independently.
Planning and Engineering - Network Design
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