Alcatel-Lucent 7750 SR OS Service Manual page 723

Service router - mobile gateway

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[no] srrp srrp-id

config>service>ies>sub-if>grp-if

This command creates a Subscriber Router Redundancy Protocol (SRRP) instance on a group IP

interface. An SRRP instance manages all subscriber subnets within the group interfaces subscriber IP

interface or other subscriber IP interfaces that are associated through a wholesale/retail relationship.

Only one unique SRRP instance can be configured per group interface.

The no form of the command removes an SRRP instance from a group IP interface. Once removed,

the group interface ignores ARP requests for the SRRP gateway IP addresses that may exist on

subscriber subnets associated with the group IP interface. Then the group interface stops routing

using the redundant IP interface associated with the group IP interface and will stop routing with the

SRRP gateway MAC address. Ingress packets destined to the SRRP gateway MAC will also be

silently discarded. This is the same behavior as a group IP interface that is disabled (shutdown).

srrp-id — Specifies a 32 bit instance ID that must be unique to the system. The instance ID must also

gw-mac mac-address

config>service>ies>sub-if>grp-if>srrp

This command overrides the default SRRP gateway MAC address used by the SRRP instance. Unless

specified, the system uses the same base MAC address for all SRRP instances with the last octet

overridden by the lower 8 bits of the SRRP instance ID. . The same SRRP gateway MAC address

should be in-use by both the local and remote routers participating in the same SRRP context.

One reason to change the default SRRP gateway MAC address is if two SRRP instances sharing the

same broadcast domain are using the same SRRP gateway MAC. The system will use the SRRP

instance ID to separate the SRRP messages (by ignoring the messages that does not match the local

instance ID), but a unique SRRP gateway MAC is essential to separate the routed packets for each

gateway IP address.

The no form of the command removes the explicit SRRP gateway MAC address from the SRRP

instance. The SRRP gateway MAC address can only be changed or removed when the SRRP instance

is shutdown.

mac-address — Specifies a MAC address that is used to override the default SRRP base MAC

7750 SR OS Services Guide

match the instance ID used by the remote router that is participating in the same SRRP context.

SRRP is intended to perform a function similar to VRRP where adjacent IP hosts within local

subnets use a default gateway to access IP hosts on other subnets.

1 — 4294967295

Any MAC address except all zeros, broadcast or multicast addresses. The offset is

expressed in normal Ethernet MAC address notation. The defined gw-mac cannot

be 00:00:00:00:00:00, ff:ff:ff:ff:ff:ff or any multicast address.

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