Archive for September, 2017

Posted by keith.wirch at September 13, 2017

Category: CCNP Notes

ProtocolHSRP (Hot Standby Router Protocol)
CISCO - PROPRIETARY
VRRP (Virtual Router Redundancy Protocol)
MULTI-VENDOR
GLBP (Gateway Load Balancing Protocol
CISCO PROPRIETARY
TerminologyActive/StandbyMaster/BackupActive virtual Gateway (AVG)/Standby Virtual Gateway(SVG)/Active Virtual Forwarder(AVF)
Virtual MACAll participants share the MAC address that is passed between whoever is the active gateway.All participants share the MAC address that is passed between whoever is the master gateway.Gateway MAC is different for each member within the group.
Communication MethodIP Multicast
224.0.0.2 (v1) (popular)
224.0.0.102 (v2)
IP Multicast
224.0.0.18 (IPv4)
FF02::12 (IPv6)
IP Multicast
224.0.0.102
Authentication OptionsDefault: None
Plain Text
MD5
Default: None
Plain Text
MD5
Default: None
Plain Text
Active SelectionHighest Priority wins!

Default: 100
Highest Priority wins!

Default: 100
Highest Priority wins! There is SVG still chosen but the rest are in a listen state.

Default: 100
TimersHELLO - Messages exchanged between routers. Default is 3 seconds.
HOLD - TIme the router will hold until it doesn't receives Hello message assumes the Active is gone. Default is 10 seconds.
Similar to HSRP.
Hello Default is 1 second and Hold timer is 3 seconds.
Again, similar to HSRP. Hello default is 3 seconds and the Hold timer is 10 seconds.
Preemption DefaultsOffOnOff

Some of these were taken from here.  But I put a little of my own spin on it.