Intel ER8100STUS - Express 8100 Router, Reference Manual

Page: 80 / 150

Reference.bok : Chapter08 68 Wed Apr 22 10:58:08 1998
68
Static Routes
IP Routing
Static Routes
Definition A static route is a permanent entry in the routing table.
Purpose
The purpose of setting a static route is to create a permanent route to an IP net-
work or host. This can be done for the following reasons:
■
to eliminate Routing Information Protocol (RIP) overheads from a link
Eliminating RIP overheads from a link maximizes the available bandwidth
for data transfers. This can be particularly useful for slow WAN links which
could be swamped by the RIP updates. Using static routing to eliminate RIP
is only practical for connecting to a few remote networks.
■
to establish routes to IP networks and hosts which would not otherwise be
reachable using RIP
Two examples of where a static route must be established in order to reach
destinations are given following.
IP RIP routing over PPP
Tunnels
When using IP RIP routing over a PPP Tunnel a static host route to the IP address
of the remote router must be established or the tunnel will not be stable.