3Com S7906E - Switch, Configuration Manual

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VRRP Configuration
When configuring VRRP, go to these sections for information you are interested in:
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VRRP Overview
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VRRP Standard Protocol Mode
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VRRP Load Balancing Mode
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Configuring VRRP for IPv4
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Configuring VRRP for IPv6
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IPv4-Based VRRP Configuration Examples
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IPv6-Based VRRP Configuration Examples
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Troubleshooting VRRP
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The term router in this document refers to a router in a generic sense or a Layer 3 switch.
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At present, the interfaces that VRRP involves can only be VLAN interfaces.
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EA boards (such as LSQ1GP12EA and LSQ1TGX1EA) do not support IPv6 features.
VRRP Overview
Normally, as shown in Figure 1-1 , you can configure a default route with the gateway as the next hop for
every host on a network segment. All packets destined to other network segments are sent over the
default route to the gateway and then be forwarded by the gateway. However, when the gateway fails,
all the hosts using the gateway as the default next-hop router fail to communicate with the external
network.
Figure 1-1 LAN networking