Ip Vpn Prerequisites; Ip Vpn Deployment Scenarios - Avaya 8800 Planning And Engineering, Network Design

The Ethernet Routing Switch 8800/8600 requires that a unique VRF be associated with a unique
VPN in a single PE device. This means that no two VRFs are attached to the same VPN, thus
requiring forwarding between VRFs in single PE. All the CE devices that belong to a single VPN in a
single PE device must be part of a single VRF.
The throughput for all standard packet sizes for VPN routed traffic is minimum 90% (depends on
egress queue behavior). For more information about IP VPN scalability, see
scaling capabilities
document.

IP VPN prerequisites

Before you use IP VPN:
• Choose an Interior Gateway Protocol: OSPF and RIP are supported.
• Choose a Route Distinguisher (RD): a unique RD per VRF is supported.
• Select an access topology, an access routing protocol (static routes, RIP, OSPF, or EBGP, or a
mix of these), and provide provider edge to customer edge router addressing.
• Define site backup and resiliency options (for example, dual access lines to a single provider
edge (PE) router, dual access lines with dual PEs, dual access lines with two CEs and two
PEs).
• Set up an Autonomous System Number (ASN). ASNs are usually allocated by service
providers for customers that need to connect to the provider edge router using eBGP.

IP VPN deployment scenarios

When the Avaya Ethernet Routing Switch 8800/8600 is used as a PE device, the following are the
means by which a CE device can connect to PE device:
• One CE connects to a single PE using a single GbE, 10 GbE, or 10/100/1000 Mbit/s port.
• One CE multilink trunks to a single PE using multiple (up to eight) GbE, 10 GbE, or
10/100/1000 Mbit/s ports.
• One CE connects to two PEs (two VRFs but same VPN) using RSMLT.
• Multiple CEs connect to a single PE using VRF, and packets are locally forwarded.
A CE device exchanges routing information with PE devices using static routes and an Interior
Gateway Protocol (IGP), for example, OSPF and RIP. The CE device routing engine works with the
routing protocol running in the context of a VRF in the PE device. This generally occurs in Enterprise
environments.
June 2016
on page 29 or the Release Notes. The Release Notes take precedence over this
Planning and Engineering — Network Design
Comments on this document? infodev@avaya.com
IP VPN prerequisites
Table 5: Supported
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