Chapter 12 Avaya P330 Layer 3 Features
SRRP Configuration
SRRP Overview
Avaya P330 IP SRRP redundancy capabilities provide automatic backup Layer 3 switching for IP stations. P330 units can be configured to back each other up so that if one fails the other will take over its forwarding functions. The backup P330 is not idle. As long as both P330 units are functional, traffic is shared between them. The P330 can back up another P330 unit or any other router.
A P330 unit configured to back up another unit monitors the other's status by polling it at configured intervals, and automatically detects when the other fails and when it becomes functional again. When detecting a failure, the backup P330 sends a gratuitous ARP message that causes all stations to send their IP traffic to the backup P330 MAC address instead of the failed unit MAC address. As long as it is an active backup resulting from the failure of the main unit, the backup P330 answers ARP requests for the main unit, providing its own MAC address
SRRP Configuration Example
| P330 - Backup Router |
IP: 20.20.20.10 | IP: 20.20.20.1 |
DG: 20.20.20.2 | MAC: AB.CD.EF.AB.CD.EF |
IP: 20.20.20.20 | Main Router |
DG: 20.20.20.2 | IP: 20.20.20.2 |
MAC: CD.EF.AB.CD.EF.AB
•The P330 in SRRP mode can backup any other router
•The integrity of the main router is checked via periodic ping polling (default period is 3 sec.)
•When the backup router doesn’t receive ping response after
148 | Avaya |
