Proxy Arp And Packet Forwarding - Avaya 1000 Series Configuration Manual

IP MULTIPLEXING OVERVIEW

Proxy ARP and Packet Forwarding

In the simple network example below, router 1, router 2, and both Secure Router Ethernets
are on a single 29-bit IP subnet. Consider the sequence that occurs when router 1 pings router
2.
Figure 11: Proxy ARP and Packet Forwarding
1. Router 1 broadcasts an ARP request for 200.1.1.1.
2. Forwarding Router 1 recognizes that router 200.1.1.1 is reachable through its WAN
3. Forwarding Router 1 Proxy ARPs, responding with the MAC address mapped to
4. Router 1 unicasts the ping echo request to that MAC address.
5. Forwarding Router 1 forwards the echo request for 200.1.1.1 through the WAN1
6. Forwarding Router 2 receives a packet on WAN2 and forwards it to directly
7. The echo reply from router 2 to router 1 is returned in the same manner.
82 Avaya Secure Router 1000 Series Configuration Guide
interface, based on a configured IP route.
bundle WAN1.
bundle.
connected router 2.
December 2010