Reviewing GLBP
With GLBP, there is one AVG and up to four AVFs in a group. The AVG is responsible for handing out the AVF MAC addresses to the hosts in the LAN. Therefore, it is responsible for replying to ARP requests for the MAC address of the default gateway. Note that the AVG is usually an AVF as well. The AVFs are responsible for processing the frames that are sent to their MAC address.
Figure 8-8 shows a GLBP topology example. R1 is the AVG, and R1 and R2 are AVFs. The virtual router IP address that will be used as the default gateway on all the hosts is 10.1.1.62. When Workstation A sends an ARP request for the MAC address of 10.1.1.62, ...
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