What is the virtual MAC address format for GLBP?

The virtual MAC address format for Gateway Load Balancing Protocol (GLBP) is represented as 0007.b400.XXYY. This format is specific to GLBP, which is a Cisco protocol used to allow multiple routers to work together to create a single virtual gateway for load balancing and redundancy.

In GLBP, the presence of '0007.b4' at the start of the MAC address is key to identifying that the address belongs to a GLBP group. The 'XXYY' part is a variable that helps distinguish between the different virtual routers configured within the GLBP group.

Understanding the structure of these MAC addresses is essential for network engineers as it helps in troubleshooting and ensuring that the GLBP is functioning properly, allowing for effective load balancing between gateways. Knowing this will also help in configuring the protocol correctly in networking scenarios.