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Operation Manual – Routing Protocol

H3C S3600 Series Ethernet Switches-Release 1510 Chapter 2

Static Route Configuration

2-1

Chapter 2 Static Route Configuration

 Note:

When running a routing protocol, the Ethernet switch also functions as a router. The

word “router” and the router icons covered in the following text represent routers in

common sense and Ethernet switches running a routing protocol.

2.1 Introduction to Static Route

2.1.1 Static Route

Static routes are special routes. They are manually configured by the administrator.

By configuring static routes, you can build an interconnecting network. The problem

for such configuration is when a fault occurs on the network, a static route cannot

change automatically to steer away from the fault point without the help of 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.

Static routes are divided into three types:

z Reachable 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.

z Unreachable 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.

z Blackhole 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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