Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 2 VRRP Configuration Commands
3Com Corporation
2-4
Use the vrrp ping-enable command to enable users to ping the virtual IP addresses of
standby groups.
Use the undo vrrp ping-enable command to disable users to ping the virtual IP
addresses of standby groups.
By default, users cannot ping the virtual IP addresses of standby groups.
Example
# Enable users to ping the virtual IP addresses of standby groups.
[3Com ] vrrp ping-enable
2.1.5 vrrp un-check ttl
Syntax
vrrp un-check ttl
undo vrrp un-check ttl
View
Ethernet interface view
Parameter
None
Description
Use the vrrp un-check ttl command to disable the VRRP standby group to check the
TTL field in VRRP packets.
Use the undo vrrp un-check ttl command to enable the VRRP standby group to check
the TTL field in VRRP packets. Any packet with TTL value other than 255 will be
dropped.
By default, TTL check on VRRP packets is enabled.
Example
# Disable the VRRP standby group to check the TTL field in VRRP packets.
[3Com -Ethernet0/0/0] vrrp un-check ttl
# Enable the VRRP standby group to check the TTL field in VRRP packets.
[3Com -Ethernet0/0/0] undo vrrp un-check ttl
2.1.6 vrrp vrid preempt-mode
Syntax
vrrp vrid virtual-router-ID preempt-mode [ timer delay delay-value ]