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H3C Technologies H3C MSR 5600 User Manual

Page 15

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7

Figure 5 Virtual MAC address assignment

2.

When an ARP request arrives, the master (Router A) selects a virtual MAC address based on the
load balancing algorithm to answer the ARP request. In this example, Router A returns the virtual

MAC address of itself in response to the ARP request from Host A, and returns the virtual MAC

address of Router B in response to the ARP request from Host B. See

Figure 6

.

Figure 6 Answering ARP requests

3.

Each host sends packets to the returned MAC address. As shown in

Figure 7

, Host A sends packets

to Router A and Host B sends packets to Router B.

Gateway IP: 10.1.1.1/24

Gateway IP: 10.1.1.1/24

Virtual MAC: 000f-e2ff-0012

Host A

Host B

Router A

Master

Router B

Backup

Virtual IP: 10.1.1.1/24

Network

Virtual MAC: 000f-e2ff-0011

Allocate Virtual MAC
000f-e2ff-0012 to Router B

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