The virtual IP address and virtual MAC address are active on the HSRP Master router.
The HSRP default timers are a 3 second hello interval and a 10 second dead interval.
HSRP supports only clear-text authentication.
The HSRP virtual IP address must be on a different subnet than the routers’ interfaces on the same LAN.
The HSRP virtual IP address must be the same as one of the router’s interface addresses on the LAN.
HSRP supports up to 255 groups per interface, enabling an administrative form of load balancing.
It monitors traffic flow and link utilization.
It ensures the best VRRP router is the virtual router master for the group.
It causes traffic to dynamically move to higher bandwidth links
It thwarts man-in-the-middle attacks.
The active virtual gateway will reply with one of four possible virtual MAC addresses.
All GLBP member routers will reply in round-robin fashion.
The active virtual gateway will reply with its own hardware MAC address.
The GLBP member routers will reply with one of four possible burned in hardware addresses.
GLBP supports up to eight virtual forwarders per GLBP group.
GLBP supports clear text and MD5 password authentication between GLBP group members.
GLBP is an open source standardized protocol that can be used with multiple vendors.
GLBP supports up to 1024 virtual routers.
GLBP can load share traffic across a maximum of four routers.
GLBP elects two AVGs and two standby AVGs for redundancy.