Alcatel-Lucent 7750 SR Manual page 1338

VPRN Service Configuration Commands
gw-mac
Syntax gw-mac mac-address
no gw-mac
Context config>service>vprn>sub-if>grp-if>srrp
Description 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.
Parameters
mac-address — Specifies a MAC address that is used to override the default SRRP base MAC
keep-alive-interval
Syntax keep-alive-interval interval
no keep-alive-interval
Context config>service>vprn>sub-if>grp-if>srrp
Description
This command defines the interval between SRRP advertisement messages sent when operating in the
master state. The interval is also the basis for setting the master-down timer used to determine when
the master is no longer sending. The system uses three times the keep-alive interval to set the timer.
Every time an SRRP advertisement is seen that is better then the local priority, the timer is reset. If the
timer expires, the SRRP instance assumes that a master does not exist and initiates the attempt to
become master.
When in backup state, the SRRP instance takes the keep-alive interval of the master as represented in
the masters SRRP advertisement message. Once in master state, the SRRP instance uses its own
configured keep-alive interval.
The keep-alive-interval may be changed at anytime, but will have no effect until the SRRP instance is
in the master state.
The no form of the command restores the default interval.
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address
Values
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.
If not specified, the system uses the default SRRP gateway MAC address with the last octet
set to the 8 least significant bits of the SRRP instance ID.
7750 SR OS Services Guide