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High availability overview ··········································································································································· 1
Availability requirements ·················································································································································· 1
Availability evaluation ······················································································································································ 1
High availability technologies ········································································································································· 2
Fault detection technologies ···································································································································· 2
Protection switchover technologies ························································································································· 2
Configuring VRRP ························································································································································· 4
VRRP overview ··································································································································································· 4
VRRP standard mode ················································································································································ 5
VRRP load balancing mode ·································································································································· 10
Configuring IPv4 VRRP ·················································································································································· 15
Configuring IPv4 VRRP in the Web interface ····································································································· 15
Configuring IPv4 VRRP at the CLI ························································································································ 20
Configuring IPv6 VRRP ·················································································································································· 26
IPv6 VRRP configuration task list ·························································································································· 26
Specifying the type of MAC addresses mapped to virtual IPv6 addresses ···················································· 27
Creating a VRRP group and configuring a virtual IPv6 address ······································································ 27
Configuring router priority, preemptive mode and tracking function ······························································ 28
Configuring VF tracking ········································································································································ 29
Configuring VRRP packet attributes ····················································································································· 30
Displaying and maintaining IPv6 VRRP ··············································································································· 31
IPv4 VRRP configuration examples ······························································································································· 31
Single VRRP group configuration example in the Web interface ···································································· 31
Single VRRP group configuration example at the CLI ························································································ 35
VRRP interface tracking configuration example ································································································· 37
Multiple VRRP groups configuration example in the Web interface ································································ 40
Multiple VRRP groups configuration example at the CLI ··················································································· 43
VRRP load balancing mode configuration example ·························································································· 46
IPv6 VRRP configuration examples ······························································································································· 55
Single VRRP group configuration example ········································································································· 55
VRRP interface tracking configuration example ································································································· 58
Multiple VRRP groups configuration example ···································································································· 61
VRRP load balancing mode configuration example ·························································································· 64
Troubleshooting VRRP ···················································································································································· 72
The screen frequently displays error prompts ····································································································· 72
Multiple masters are present in the same VRRP group ······················································································ 73
Frequent VRRP state transition ······························································································································ 73
Configuring stateful failover ······································································································································ 74
Stateful failover overview ·············································································································································· 74
Service backup ······················································································································································ 75
Configuration synchronization ····························································································································· 75
Stateful failover states ··········································································································································· 75
Configuring stateful failover in the Web interface ····································································································· 76
Configuring stateful failover ································································································································· 76
Stateful failover configuration example ·············································································································· 78
Configuring stateful failover at the CLI ························································································································· 80
Stateful failover configuration task list ················································································································· 80
Enabling stateful failover ······································································································································ 81
