R21xx-HP FlexFabric 11900 High Availability Configuration Guide
ii
Configuring DLDP authentication ·································································································································· 29
Displaying and maintaining DLDP ································································································································ 29
DLDP configuration examples ······································································································································· 30
Automatically shutting down unidirectional links ······························································································· 30
Manually shutting down unidirectional links ······································································································ 33
Configuring VRRP ······················································································································································· 38
Overview ········································································································································································· 38
VRRP standard mode ····················································································································································· 39
Router priority in a VRRP group ··························································································································· 39
Preemption ····························································································································································· 39
Authentication method ·········································································································································· 40
VRRP timers ···························································································································································· 40
How VRRP works ··················································································································································· 40
VRRP tracking ························································································································································· 41
VRRP application ··················································································································································· 41
Protocols and standards ················································································································································ 43
Configuring IPv4 VRRP ·················································································································································· 43
IPv4 VRRP configuration task list ·························································································································· 43
Specifying the IPv4 VRRP version ························································································································ 43
Creating a VRRP group and assigning a virtual IP address ············································································· 43
Configuring the router priority, preemptive mode, and tracking function ······················································ 44
Configuring IPv4 VRRP packet attributes ············································································································ 45
Disabling an IPv4 VRRP group ····························································································································· 46
Displaying and maintaining IPv4 VRRP ··············································································································· 46
Configuring IPv6 VRRP ·················································································································································· 46
IPv6 VRRP configuration task list ·························································································································· 46
Creating a VRRP group and assigning a virtual IPv6 address ········································································· 47
Configuring the router priority, preemptive mode, and tracking function ······················································ 48
Configuring the IPv6 VRRP advertisement interval ····························································································· 48
Disabling an IPv6 VRRP group ····························································································································· 49
Displaying and maintaining IPv6 VRRP ··············································································································· 49
IPv4 VRRP configuration examples ······························································································································· 50
Single VRRP group configuration example ········································································································· 50
Multiple VRRP groups configuration example ···································································································· 52
IPv6 VRRP configuration examples ······························································································································· 55
Single VRRP group configuration example ········································································································· 55
Multiple VRRP groups configuration example ···································································································· 58
Troubleshooting VRRP ···················································································································································· 62
An error prompt is displayed ······························································································································· 62
Multiple masters appear in a VRRP group ·········································································································· 62
Fast VRRP state flapping ······································································································································· 62
Configuring BFD ························································································································································· 64
Introduction to BFD ························································································································································· 64
BFD session establishment ···································································································································· 64
BFD session modes and operating modes ·········································································································· 64
Supported features ················································································································································ 65
Protocols and standards ······································································································································· 66
Configuring BFD basic functions ·································································································································· 66
Configuring echo packet mode ··························································································································· 66
Configuring control packet mode ························································································································ 67
Displaying and maintaining BFD ·································································································································· 68
Configuring Track ······················································································································································ 69
Overview ········································································································································································· 69