HSRP VRRP GLBP IRDP
IRDP an alternative to HSRP, VRRP or GLBP
IRDP is an alternative technology to HSRP, VRRP, GLBP and the like.
IRDP makes use of ICMP messages to inform hosts of a default gateway they can use.
Consider the toplogy below.
R2 and R3 announce themselves as default gateways to R1. R2 is configured with an IRDP preference of 10 and R3 is configured with an IRDP [...]

