3Com WX3000 operation manual Static Route Configuration, Introduction to Static Route

2 Static Route Configuration

When configuring a static route, go to these sections for information you are interested in:

zIntroduction to Static Route

zStatic Route Configuration

zDisplaying and Maintaining Static Routes

zStatic Route Configuration Example

zTroubleshooting a Static Route

The term router in this chapter refers to a router in a generic sense or a WX3000 series device running a routing protocol.

Introduction to Static Route

Static Route

Static routes are special routes. They are manually configured by the administrator. In a relatively simple network, you only need to configure static routes to make routers work normally. Proper configuration and usage of static routes can improve network performance and ensure sufficient bandwidth for important applications.

When the network topology changes, static routes may become unreachable because they cannot adapt themselves to the change automatically, thus resulting in network interruption. In this case, the network administrator needs to modify the configuration of static routes manually.

Static routes are divided into three types:

zReachable route: normal route. If a static route to a destination is of this type, the IP packets destined for this destination will be forwarded to the next hop. It is the most common type of static routes.

zUnreachable route: route with the reject attribute. If a static route to a destination has the reject attribute, all the IP packets destined for this destination will be discarded, and the source hosts will be informed of the unreachability of the destination.

zBlackhole route: route with blackhole attribute. If a static route destined for a destination has the blackhole attribute, the outgoing interface of this route is the Null 0 interface regardless of the next hop address, and all the IP packets addressed to this destination will be dropped without notifying the source hosts.

The attributes reject and blackhole are usually used to limit the range of the destinations this router can reach, and help troubleshoot the network.

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