HP 3100-16 v2 SI Panduan Konfigurasi - Halaman 7

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Configuring static routing

Static routes are manually configured. If a network's topology is simple, you only need to configure static

routes for the network to work properly. The proper configuration and usage of static routes can improve

network performance and ensure bandwidth for important network applications.

Static routes cannot adapt to network topology changes. If a fault or a topological change occurs in the

network, the relevant routes will be unreachable and the network breaks. When this happens, the

network administrator must modify the static routes manually.

The term "router" in this chapter refers to both routers and Layer 3 switches.

Without a default route, a packet that does not match any routing entries is discarded.

A default route is used to forward packets that do not match any routing entry. The network administrator

can configure a default route with both the destination and mask being 0.0.0.0. The router forwards any

packet whose destination address fails to match any entry in the routing table to the next hop of the

default static route.

Before you configure a static route, you must know the following concepts:

Destination address and mask

•

In the ip route-static command, an IPv4 address is in dotted decimal notation. A mask can be

either in dotted decimal format or in the form of mask length—the number of consecutive 1s in the

mask.

Output interface and next hop address

•

When you configure a static route, specify either the output interface, next hop address, or both

depending on the specific occasion. The next hop address cannot be a local interface IP address;

otherwise, the route configuration will not take effect.

Each route lookup operation has to find the next hop to resolve the destination link layer address.

Follow these guidelines when you specify the output interface:

If the output interface is a Null 0 interface, no next hop address is required.

If you specify a broadcast interface (such as a VLAN interface) as the output interface, you must

specify the corresponding next hop for the output interface.