You can also take it as the redirect time is the interval during which the AVG continues to redirect hosts to the old virtual forwarder MAC address. The virtual MAC address that the forwarder was responsible for replying to is still given out in Address Resolution Protocol (ARP) replies, but the forwarding task is handled by another router in the GLBP group. The redirect timer sets the time delay between a forwarder failing on the network and the AVG assuming that the forwarder will not return. If the virtual forwarder has learned the virtual MAC address from hello messages, it is referred to as a secondary virtual forwarder. Redirect Timer & Timeout Interval & Secondary HoldtimeĪ virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder.

These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address VF: in GLBP group all router with the virtual MAC address is known as the VF.right.Įach gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. The AVG assigns a virtual MAC address to each member of the GLBP group Other group members provide backup for the AVG in the event that the AVG becomes unavailable. Members of a GLBP group elect one gateway to be the active virtual gateway (AVG) for that group. AVG: this router i having functionlike redundancy and also provide the virtual MAC address right

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