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ccna full course.. VirtualIP: HSRP group virtual IP address.(2) View HSRP details of VLAN port Sl#show standby vlan 2 View HSRP details of VLAN port VIan2 -Group 2 (version 2) HSRP enabled port, group number and HSRP version information State is Active is the active router of group 2 10 statechanges, last state change 00:36:56 // HSRP state change number and time since last state changeVirtual IP address is 172.16.12.254 //virtual IP address of HSRP group Active virtualMAC address is 0000.0c9f.fD02The MAC address of the virtual gateway, for HSRP version 2, the default is 0000.0c09f.fYYY, YYY is the group number of HSRP Local virtual MAC address is 0000.0c9f.K)02 (v2 default) //the local virtual MAC address generated by HSRP version 2 Hello time 6 sec, hold time 20 sec //Hello period and hold time of HSRP groupNext hello sent in 4.656 secs time until the next HSRP Hello packet is sent Authentication MD5,key-string //HSRP authentication using MD5 string method Preemption enabled enable HSRP preemption functionActive router is local//Local router is the active router Standby router is 172.16.2.253, priority 100 (expires in 18.160 sec) //HSRP backup router IP address, HSRP group priority and Hold timer from 20 seconds Priority 110 (configured 110)Configures the HSRP port priority to 110 Track interface FastEthemetO/1 state Up decrement 20 //HSRP port tracking, the current state of the tracked port is up, if the port fails, the priority will be decremented by 20. Groupname is "hsrp-V12-2"(default)//HSRP group name, you can use the command standby2name to configure it, if not, the system will automatically generate it according to the hsrp-port-name abbreviation-group-number format(3) Watch HSRP state switching Turn port Fa0/l off on switch S1. the following message is displayed on S1.*Mar 1 01:01:52.361: %TRACKING-5-STATE: 1 interface Fa0/l line-protocol Up->Down //HSRP tracking port state changed from Up to Down *Mar 1 01:01:56.396: %HSRP-5-STATECHANGE : Vlan2 Grp 2 state Active -> Speak .Mar 101:02:20.262: %HSRP-5-STATECHANGE: Vlan2 Grp 2 state Speak -> Standby The above output shows that after the port tracked by HSRP in group 2 is shut down, the router in the HSRP group of VLAN 2 changes from an active router to a backup router because the HSRP priority is reduced to 20, which becomes 90 (110-20). active router to a backup router. You can use the