HSRP
Cisco Proprietary
- UDP port 1985 (v6 2029)
- Version 1, RFC 2281
- Version 2, adds IPv6, no RFC
Version 1
- No millisecond timers
- Groups from 0 to 255
- hello messages have virtual mac
- 224.0.0.2
- default timers: 3s / 10s
Version 2
- Millisecond timers
- Groups from 0 to 4095
- Hello messages have src-mac
- 224.0.0.102
- ff02::66
- address range: 0000.0C9F.F000 to 0000.0C9F.FFFF
Example
R3# show standby brief
P indicates configured to preempt.
|
Interface Grp Pri P State Active Standby Virtual IP
Gi0/0 34 100 Standby 192.168.34.4 local 192.168.34.34
Config
interface GigabitEthernet0/0
ip address 192.168.34.3 255.255.255.0
standby 34 ip 192.168.34.34
ipv6 address 2001:DB8:0:34::3/64