Active Router가 Down되거나 회선에 문제가 생겨 통신이 불가능해진 경우 Active Router를 전환하기 위해 사용.

셋팅

HQ_SE_1F_SW1(config-if)#standby 10 track FastEthernet0/6

HQ_SE_1F_SW1(config-if)#standby 10 preempt

결과

HQ_SE_2F_L3_1#show standby brief

P indicates configured to preempt.

|

Interface   Grp   Pri   P   State   Active   Standby       Virtual IP

Vl10          10   150  P  Active   local   192.168.2.29  192.168.2.30

HQ_SE_2F_L3_2#show standby brief

P indicates configured to preempt.

|

Interface   Grp    Pri   P   State    Active        Standby   Virtual IP

Vl10         10     145  P Standby 192.168.2.28   local    192.168.2.30

HQ_SE_2F_L3_1#show standby brief

P indicates configured to preempt.

|

Interface   Grp   Pri   P   State       Active      Standby    Virtual IP

Vl10         10    140  P  Standby 192.168.2.29   local     192.168.2.30

HQ_SE_2F_L3_2#show standby brief

P indicates configured to preempt.

|

Interface   Grp   Pri   P    State     Active     Standby      Virtual IP

Vl10         10    145  P   Active    local     192.168.2.28 192.168.2.30