H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 213)

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Static Routing Configuration
When configuring a static route, go to these sections for information you are interested in:
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Introduction
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Configuring a Static Route
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Detecting Reachability of the Static Route’s Nexthop
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Displaying and Maintaining Static Routes
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Configuration Example
The term switch in this document refers to a switch in a generic sense or an access controller
configured with the switching function unless otherwise specified.
Introduction
Static Route
A static route is a special route that is manually configured by the network administrator. If a network’s
topology is simple, you only need to configure static routes for the network to work normally. The proper
configuration and usage of static routes can improve network performance and ensure bandwidth for
important network applications.
The disadvantage of using static routes is that they cannot adapt to network topology changes. If a fault
or a topological change occurs in the network, the routes will be unreachable and the network breaks. In
this case, the network administrator has to modify the static routes manually.
Default Route
A router selects the default route only when it cannot find any matching entry in the routing table.
If the destination address of a packet fails to match any entry in the routing table, the router selects the
default route to forward the packet.
If there is no default route and the destination address of the packet fails to match any entry in the
routing table, the packet will be discarded and an ICMP packet will be sent to the source to report that
the destination or the network is unreachable.
You can create the default route with both destination and mask being 0.0.0.0, and some dynamic
routing protocols, such as OSPF, RIP and IS-IS, can also generate the default route.
Application Environment of Static Routing
Before configuring a static route, you need to know the following concepts: