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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 BFD ··························································································································································· 4
Introduction to BFD ···························································································································································· 4
How BFD works ························································································································································ 4
BFD packet format ···················································································································································· 7
Supported features ··················································································································································· 8
Protocols and standards ·········································································································································· 9
Configuring BFD basic functions ····································································································································· 9
Configuration prerequisites ····································································································································· 9
Configuration procedure ········································································································································· 9
Enabling trap ·································································································································································· 10
Displaying and maintaining BFD ·································································································································· 11
Configuring interface backup ··································································································································· 12
Overview ········································································································································································· 12
Active and standby interfaces ······························································································································ 12
How interface backup works ······························································································································· 13
Interface backup configuration task list ······················································································································· 14
Configuring interface backup ······································································································································· 14
Configuring active/standby mode ······················································································································ 14
Associating an interface with a track entry ········································································································ 15
Configuring load balancing·········································································································································· 15
Configuring the delay timer for the backup function to take effect on system startup ············································ 16
Displaying and maintaining interface backup ············································································································ 17
Interface backup configuration examples ··················································································································· 17
Multi-interface backup configuration example ··································································································· 17
Multi-interface load balancing configuration example ····················································································· 18
Configuring Track ······················································································································································ 22
Track overview ······························································································································································· 22
Collaboration fundamentals ································································································································· 22
Collaboration application example ····················································································································· 23
Collaboration application example on an AC ··································································································· 23
Track configuration task list ··········································································································································· 24
Associating the Track module with a detection module ····························································································· 24
Associating Track with NQA ······························································································································· 24
Associating Track with BFD ·································································································································· 25
Associating Track with interface management ··································································································· 26
Associating the Track module with an application module ······················································································· 27
Associating Track with VRRP ································································································································ 27
Associating Track with static routing ··················································································································· 28
Associating Track with PBR ·································································································································· 29
Associating Track with interface backup ············································································································ 31
Displaying and maintaining track entries ···················································································································· 32
