Difference between HSRP version 1 and version 2

HSRP version 1:-

·        
Maximum number of group supported –256 ( 0 -255
)
·        
Mac used – 0000.0c07.ac00 to 0000.0c07.acff (which
can conflict with CGMP leave processing)
·        
Hello packet multicast address is 224.0.0.2
·         Default version 
( in both catalyst and Nexus switches )
·         Only Text authentication with cisco password is supported.
·         Millisecond Timers are not advertised or learned.
·        The active router will send hello messages with source MAC address of the HSRP virtual MAC address
.
HSRP version 2:-

·        
Maximum number of group supported – 4096 ( 0 –
4095 ).
·        
Mac address used – 0000.0c9f.f000 – 0000.0c9F.FFFF.
·        
Hello packet multicast address 224.0.0.102 which
removes the problem with version1
·        
Need to enable version 2 explicitly.
·        
Supports MD5 authentication
·         Millisecond Timers can be advertised or learned.
·        The active router will send hello messages with source MAC address of the interface MAC address.

Note  :- 
  • HSRP version 1 and 2 have different Packet
    format
  • Both are not compatible to each
    other. Both side of interface must have identical version.