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VRRP
7750 SR OS Router Configuration Guide Page 233
The mac command sets the MAC address used in ARP responses when the virtual router instance is
master. Routing of IP packets with ieee-mac-addr as the destination MAC is also enabled. The mac
setting must be the same for all virtual routers participating as a virtual router or indeterminate
connectivity by the attached IP hosts will result. All VRRP advertisement messages are transmitted
with ieee-mac-addr as the source MAC.
The command can be configured in both non-owner and owner vrrp nodal contexts.
The mac command can be executed at any time and takes effect immediately. When the virtual router
MAC on a master virtual router instance changes, a gratuitous ARP is immediately sent with a VRRP
advertisement message. If the virtual router instance is disabled or operating as backup, the gratuitous
ARP and VRRP advertisement message is not sent.
The no form of the command restores the default VRRP MAC address to the virtual router instance.
Default no mac - The virtual router instance uses the default VRRP MAC address derived from the
VRID.
Parameters mac-addr — The 48-bit MAC address for the virtual router instance in the form aa:bb:cc:dd:ee:ff or
aa-bb-cc-dd-ee-ff where aa, bb, cc, dd, ee and ff are hexadecimal numbers. Allowed values are
any non-broadcast, non-multicast MAC, and non-IEEE reserved MAC addresses.
master-int-inherit
Syntax [no] master-int-inherit
Context config>router>if>vrrp
Description This command enables the virtual router instance to inherit the master VRRP router’s advertisement
interval timer which is used by backup routers to calculate the master down timer.
The master-int-inherit command is only available in the non-owner nodal context and is used to
allow the current virtual router instance master to dictate the master down timer for all backup virtual
routers. The master-int-inherit command has no effect when the virtual router instance is operating
as master.
If master-int-inherit is not enabled, the locally configured message-interval must match the
master’s VRRP advertisement message advertisement interval field value or the message is
discarded.
The no form of the command restores the default operating condition which requires the locally
configured message-interval to match the received VRRP advertisement message advertisement
interval field value.
Default no master-int-inherit - The virtual router instance does not inherit the master VRRP router’s
advertisement interval timer and uses the locally configured message interval.