4 thoughts on “What is the multicast address for HSRP?”
The multicast address 224.0.0.2 is used to send HSRP hello messages. This address can conflict with Cisco Group Management Protocol (CGMP) leave processing.
Version 1 is the default version of HSRP.
HSRP version 2 uses the new IP multicast address 224.0.0.102 to send hello packets instead of the multicast address of 224.0.0.2, used by HSRP version 1. This new multicast address allows CGMP leave processing to be enabled at the same time as HSRP.
The multicast address 224.0.0.2 is used to send HSRP hello messages. This address can conflict with Cisco Group Management Protocol (CGMP) leave processing.
Version 1 is the default version of HSRP.
HSRP version 2 uses the new IP multicast address 224.0.0.102 to send hello packets instead of the multicast address of 224.0.0.2, used by HSRP version 1. This new multicast address allows CGMP leave processing to be enabled at the same time as HSRP.
https://blog.boson.com/bid/106020/First-Hop-Redundancy-Protocol-FHRP
HSRP
v1 224.0.0.2
v2 224.1.1.102
VRRP
224.0.0.18
GLBP
224.0.0.102
for Version 1, it is 224.0.0.2
for Version 2, it is 224.0.0.102
for Version 1, it is 224.0.0.2
for Vension 2, it is 224.0.0.102