Wikipedia:
A virtual router must use 00-00-5E-00-01-XX as its Media Access Control
(MAC) address. The last byte of the address (XX) is the Virtual Router
IDentifier (VRID), which is different for each virtual router in the
network. This address is used by only one physical router at a time, and
it will reply with this MAC address when an ARP request is sent for the
virtual router's IP address. The destination MAC address for VRRP
'hello' messages (sent between routers participating in a VRRP-group) is
set to the Ethernet multicast MAC address 01-00-5E-00-00-12
Physical routers within the virtual router must communicate within themselves using packets with multicast IP address 224.0.0.18 and IP protocol number 112.[4]
Routers have a priority of between 1-255 and the router with the
highest priority will become the master. When a planned withdrawal of a
master router is to take place, its priority can be lowered which means a
backup router will pre-empt the master router status rather than having
to wait for the hold time to expire. This reduces the black hole
period. The default priority is 100 for backups and 255 for a master.
Trata-se da famosa questao "onde o filho chora e a mãe não vê" (ou melhor, onde os concurseiros choram e os professores fingem q não veem!!!)
Isso é questão pra professor entrar de sola, de voadeira, de carrão de sena!!! Kd essa galera???!!!
Vamos tentar responder essa!!!
Segundo[2] VRRP holds an election based on priority values and select one router to be the master router. All other routers are backup routers. Each router is config-ured with the same virtual router identifier (VRID). Using the VRID arrangement, VRRP also can provide load balancing on each router's links. To manufacture a resilient Layer 2 MAC address, the following standard is used, (...) where the virtual router ID is used to make the last byte of the MAC address. In
our example, let's assume that a VRID of 10 has been used, giving us the VRRP MAC address of Figure 2—14 shows our implementation with the new VRRP addressing.
Ou seja, o VRRP fornece redundäncia através da partilha de endereqos IP e MAC entre os gateways redundantes. Ele consiste em endereqos MAC e IP virtuais que säo compartilhados entre dois roteadores que pertencem ao mesmo grupo.
Fonte:
[2] Optimizing Network Performance with Content Switching Server, Firewall, and Cache Load Balancing, Matthew Syme, Philip Goldie · 2004