Preemption, Authentication method – H3C Technologies H3C S12500-X Series Switches User Manual
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# Create VRRP group 1 and set its virtual IPv6 addresses to FE80::10 and 1::10.
[SwitchB-Vlan-interface2] vrrp ipv6 vrid 1 virtual-ip fe80::10 link-local
[SwitchB-Vlan-interface2] vrrp ipv6 vrid 1 virtual-ip 1::10
# Configure Switch B to operate in preemptive mode, and set the preemption delay to 5 seconds.
[SwitchB-Vlan-interface2] vrrp ipv6 vrid 1 preempt-mode delay 5
# Enable Switch B to send RA messages, so Host A can learn the default gateway address.
[SwitchB-Vlan-interface2] undo ipv6 nd ra halt
3.
Verify the configuration:
# Ping Host B from Host A. (Details not shown.)
# Display detailed information about VRRP group 1 on Switch A.
[SwitchA-Vlan-interface2] display vrrp ipv6 verbose
IPv6 Virtual Router Information:
Running Mode : Standard
Total number of virtual routers : 1
Interface Vlan-interface2
VRID : 1 Adver Timer : 100
Admin Status : Up State : Master
Config Pri : 110 Running Pri : 110
Preempt Mode : Yes Delay Time : 5
Auth Type : None
Virtual IP : FE80::10
1::10
Virtual MAC : 0000-5e00-0201
Master IP : FE80::1
# Display detailed information about VRRP group 1 on Switch B.
[SwitchB-Vlan-interface2] display vrrp ipv6 verbose
IPv6 Virtual Router Information:
Running Mode : Standard
Total number of virtual routers : 1
Interface Vlan-interface2
VRID : 1 Adver Timer : 100
Admin Status : Up State : Backup
Config Pri : 100 Running Pri : 100
Preempt Mode : Yes Delay Time : 5
Become Master : 403ms left
Auth Type : None
Virtual IP : FE80::10
1::10
Master IP : FE80::1
The output shows that Switch A is operating as the master in VRRP group 1 to forward packets from
Host A to Host B.
# Disconnect the link between Host A and Switch A, and verify that Host A can still ping Host B.
(Details not shown.)
# Display detailed information about VRRP group 1 on Switch B.
[SwitchB-Vlan-interface2] display vrrp ipv6 verbose
IPv6 Virtual Router Information: