5.3. VRRP over FDDI
Unlike Ethernet, VRRP's behavior over Fiber Distributed Data Interface (FDDI) is a bit tricky. Unlike Ethernet interfaces, FDDI interfaces will remove from the ring any frames with a MAC address that is one of their own.
In Figure 5-5, assume that R1 is the master. R1 sends out a VRRP advertisement with the VRRP MAC(V1) as the source MAC address and the VRRP multicast MAC address as the destination MAC address. If R1 sees this packet again on the ring, it will immediately remove the frame from the ring. Under certain fault conditions such as ring failure, protocol transitions, or loss of connectivity, VRRP may cause a situation in which there is more than one master. In the case of Ethernet, it is normal for both R1 and R2 ...
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