3Com Switch 8800 Configuration Guide Chapter 41 VRRP Configuration
41-7
to authenticate the VRRP packets. In this case an authentication key not exceeding 8
characters should be configured.
Those packets failing to pass the authentication will be discarded and a trap packet will
be sent to the network management system.
Perform the following configuration in VLAN interface view.
Table 41-7 Configure authentication type and authentication key
Operation Command
Configure authentication type and
authentication key
vrrp authentication-mode
authentication-type authentication-key
Remove authentication type and
authentication key undo vrrp authentication-mode
The authentication key is case sensitive.
Note:
The same authentication type and authentication key should be configured for all VLAN
interfaces that belong to the virtual router.
The Master switch advertises its normal operation state to the switches within the
VRRP virtual router by sending them VRRP packets regularly (at adver-interval). And
the backup switch only receives VRRP packets. If the Backup has not received any
VRRP packet from the Master after a period of time (specified by master-down-interval),
it will consider the Master as down, and then take its place and become the Master.
You can use the following command to set a timer and adjust the interval, adver-interval,
between Master transmits VRRP packets. The master-down-interval of the Backup
switch is three times that of the adver-interval. The excessive network traffic or the
differences between different switch timers will result in master-down-interval timing out
and state changing abnormally. Such problems can be solved through prolonging the
adver-interval and setting delay time. adver-interval is measured in seconds.
Perform the following configuration in VLAN interface view.