HSRP

sw1:

inter vlan 5

ip add 10.10.100.2  255.255.255.0

no shut

standby ip 10.10.100.254

standby preenpt

standby authentication md5 key-string ccnp

standby timers msec 100  1-----200msec發送1次hello包，1min逾時（1min發送10個hello包）

sw2:

track 1 ip route 150.1.10.0 255.255.255.0 reachability-----跟蹤目标可達

ip add 10.10.100.1 255.255.255.0

standby priority 130

standby preempt

standby authentication md5 key-string ccnp---認證