How to Configure HSRP v2 ?

There's no much difference between configuring HSRP v1 & HSRP v2. HSRP version 2 will not interoperate with HSRP version 1. HSRP v1 & 2 won't work in same interface. But we can configure v1 in one interface and v2 in another interface of the same router. Group number has been extended in version 2. version 1 supports (0 - 255) whereas, version 2 supports (0 - 4095)

New features in HSRP v2

• HSRP version 2 Group range has been extended 0 through 4095. 

• Version 1 timer values are advertised and learned in seconds, it doesn't support millisecond timers. In v2 millisecond timer values added an advantage.

• HSRP v 2 uses the new IP multicast address 224.0.0.102 to send hello packets instead of 224.0.0.2, which is used by version 1. 

• In v1 we can't identify the source of the hello packet, because router uses HSRP virtual MAC address as it's source address, which doesn't contain interface address. HSRP v2 includes a 6-bye identifier field which includes the MAC address of the local interface.

• MAC address range 0000.0C9F.F000 to 0000.0C9F.FFFF. 

• v2 cannot inter-operate with v1 because version 2 has a different packet format than v1.

Configuration Methods : 

 Step 1 : Router > enable

Step 2 : Router# configure terminal

Step3 : Router(config)#interface vlan100

Step4 : Router(config-if)# ip address 192.168.1.1 255.255.255.0

Step 5 : Router(config-if)# standby version 2    ( it shows we changed v1 to v2 )

Step 6 : Router(config-if)# standby 100 ip 192.168.1.100
( in HSRP v2 the range of group number is extended to 0 - 4095)

Step 7 : Router(config-if)# end