Refer to the exhibit. Host A has sent an ARP message to the default gateway IP address
10.10.10.1. Which statement is true?
A.
DSw2 will reply with the IP address of the next AVF.
B.
DSw1 will reply with the MAC address of the next AVF.
C.
Because of the invalid timers that are configured, DSw1 will not reply.
D.
DSw1 will reply with the IP address of the next AVF.
E.
Because of the invalid timers that are configured, DSw2 will not reply.
F.
DSw2 will reply with the MAC address of the next AVF.
Explanation:
The Gateway Load Balancing Protocol (GLBP) is a Cisco-proprietary protocol designed to
overcome the limitations of existing redundant router protocols. Some of the concepts are
the same as with HSRP/VRRP, but the terminology is different and the behavior is much
more dynamic and robust.
The trick behind this load balancing lies in the GLBP group. One router is elected the active
virtual gateway (AVG). This router has the highest priority value, or the highest IP address in
the group, if there is no highest priority. The AVG answers all ARP requests for the virtual
router address. Which MAC address it returns depends on which load-balancing algorithm it
is configured to use. In any event, the virtual MAC address supported by one of the routers
in the group is returned.
According to exhibit, Router Company2 is the Active Virtual Gateway (AVG) router because
it has highest IP address even having equal priority. When router Company1 sends the ARP
message to 10.10.10.1 Router Company2 will reply to Company1 as a Active Virtual Router.