H3C S5810 Series, Руководство по эксплуатации

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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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Configuring VRRP for IPv4
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IPv4-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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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
Gateway
Network
Host A
Host B
Host C
Configuring a default route for network hosts facilitates your configuration, but also requires high
performance stability of the device acting as the gateway. Using more egress gateways is a common
way to improve system reliability, introducing the problem of routing among the multiple egresses.