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    Configuring the Advertisement Interval for the VRRP Master

    By default, the master switch sends VRRP advertisement packets every second to all members of the VRRP group. These packets indicate that the master switch is still operational. If the master switch fails or becomes unreachable, the backup switch with the highest priority value becomes the new master switch.

    You can modify the advertisement interval in seconds or in milliseconds; the interval must be the same for all routing platforms in the VRRP group.

    This topic contains the following sections:

    Modifying the Advertisement Interval in Seconds

    To modify the time, in seconds, between the sending of VRRP advertisement packets, include the advertise-interval statement:

    advertise-interval seconds;

    The interval can be from 1 through 255 seconds.

    You can include this statement at the following hierarchy level:

    • [edit interfaces interface-name unit logical-unit-number family inet address address vrrp-group group-id]

    Modifying the Advertisement Interval in Milliseconds

    To modify the time, in milliseconds, between the sending of VRRP advertisement packets, include the fast-interval statement:

    fast-interval milliseconds;

    The interval can be from 100 through 999 milliseconds.

    You can include this statement at the following hierarchy level:

    • [edit interfaces interface-name unit logical-unit-number family (inet | inet6) address address (vrrp-group | vrrp-inet6-group) group-id]

    Note: Junos OS sets the advertisement interval to 0 in VRRP packets. When you configure VRRP with other vendors’ equipment, the fast-interval statement works correctly only when the other equipment also has the advertisement interval set to 0 in the VRRP packet. Otherwise, Junos OS interprets other routers’ settings as advertisement timer errors.

     

    Related Documentation

     

    Published: 2014-07-23

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