iii
Enabling Monitor Link globally ······················································································································· 111
Creating a monitor link group ························································································································· 111
Configuring monitor link group member interfaces ························································································ 111
In monitor link group view ······················································································································ 112
In interface view ····································································································································· 112
Configuring the switchover delay for the downlink interfaces in a monitor link group ···································· 112
Displaying and maintaining Monitor Link ······································································································· 113
Monitor Link configuration example ··············································································································· 113
Configuring VRRP ······················································································· 117
Overview ························································································································································ 117
VRRP standard mode ···································································································································· 118
Router priority in a VRRP group ············································································································· 118
Preemption ············································································································································· 118
Authentication method ··························································································································· 119
VRRP timers ·········································································································································· 119
Master election ······································································································································· 119
VRRP tracking ········································································································································ 120
VRRP application ··································································································································· 120
VRRP load balancing mode ··························································································································· 122
Virtual MAC address assignment ··········································································································· 122
Virtual forwarder ····································································································································· 123
Protocols and standards ································································································································ 125
Configuring IPv4 VRRP ································································································································· 126
IPv4 VRRP configuration task list ·········································································································· 126
Specifying an IPv4 VRRP operating mode ···························································································· 126
Specifying the IPv4 VRRP version ········································································································· 126
Creating a VRRP group and assigning a virtual IP address ·································································· 127
Configuring the router priority, preemptive mode, and tracking function ················································ 127
Configuring IPv4 VRRP packet attributes ······························································································ 128
Configuring VF tracking ·························································································································· 129
Enabling SNMP notifications for VRRP ·································································································· 130
Disabling an IPv4 VRRP group ·············································································································· 130
Displaying and maintaining IPv4 VRRP ································································································· 130
Configuring IPv6 VRRP ································································································································· 131
IPv6 VRRP configuration task list ·········································································································· 131
Specifying an IPv6 VRRP operating mode ···························································································· 131
Creating a VRRP group and assigning a virtual IPv6 address ······························································· 132
Configuring the router priority, preemptive mode, and tracking function ················································ 132
Configuring VF tracking ·························································································································· 133
Configuring IPv6 VRRP packet attributes ······························································································ 134
Disabling an IPv6 VRRP group ·············································································································· 135
Displaying and maintaining IPv6 VRRP ································································································· 135
IPv4 VRRP configuration examples ··············································································································· 135
Single VRRP group configuration example ···························································································· 135
Multiple VRRP groups configuration example ························································································ 138
VRRP load balancing configuration example ························································································· 141
IPv6 VRRP configuration examples ··············································································································· 149
Single VRRP group configuration example ···························································································· 149
Multiple VRRP groups configuration example ························································································ 151
VRRP load balancing configuration example ························································································· 155
Troubleshooting VRRP ·································································································································· 163
An error prompt is displayed ·················································································································· 163
Multiple masters appear in a VRRP group ····························································································· 163
Fast VRRP state flapping ······················································································································· 164
Configuring BFD ························································································· 165
Overview ························································································································································ 165
BFD session establishment ···················································································································· 165
BFD session modes and operating modes ···························································································· 166
Supported features ································································································································· 166
Protocols and standards ························································································································ 167
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