Advantages Of Static Routes; Configuring Static Routes - 3Com SUPERSTACK 3 WEBCACHE 3000 User Manual

Advantages of Static
Routes
Configuring Static
Routes
The solution in this scenario is to enter a static route on the Webcache to
use a LAN-side router for all requests destined for the LAN-side server.
When the Webcache processes the cache miss, instead of passing the
packet to the default router, it sends it to the LAN-side router which has
direct connectivity to the LAN-side server. Everything now functions as
expected.
Static routing has the following advantages over dynamic routing:
Predictability — The path a packet takes between two destinations is
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always known precisely because you compute the route that the
packet takes in advance. With dynamic routing, the path taken
depends on which devices and links are functioning, and how the
routers interpret the updates from other routers.
Less Overhead — Static routing does not impose any overhead on
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the routers or the network links because no dynamic routing protocol
is required. This overhead could amount to a significant portion of
network bandwidth on a low-speed dial-up link. In a network with
200 network segments, every 30 seconds, as required by the RIP
specification, all the routers send an update containing reachability
information for all 200 of these segments. With each route taking 16
octets of space, plus a small amount of overhead, the minimum size
for an update in this network is over three kilobytes. Each router must
therefore send a 3KB update on each of its interfaces every 30
seconds. For a large network, the bandwidth devoted to routing
updates can quickly add up.
In addition to Static Routes, the Webcache also listens to and respects
ICMP redirect messages directed to it from routers on your network.
To configure static routes using the Web interface:
1 Log in to the Web interface.
2 Click Device on the Toolbar.
3 Select System > Protocol > Static Routes. The Static Routes screen is
displayed.
4 Enter the IP address of the network that you are creating a static route for
in the IP Address field.

Configuring Static Routes

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