Manipulating the Network Routing Tables with the
Route Utility
The Route utility displays the current IP routing information for the local machine and lets you
change the routing table as needed. The routing table includes a number of entries, but the most
important are the active routes and the permanent routes. An active route is one that??™s currently
connected, but might not be permanent. A permanent route is always available, even when it isn??™t
connected (active). This utility uses the following syntax:
ROUTE [-f] [-p] [-4 | -6] [command [destination] [MASK netmask]
[gateway] [METRIC metric] [IF interface]
Using PING for Diagnostics
Many network administrators know the benefits of using PING, and those that don??™t often learn quite
quickly. For example, a recent client call presented a problem where the network almost worked, but
not quite. Using a Time Domain Reflectometer (TDR) showed that the cables were good. The diagnostics
for the network card didn??™t show any unusual results and the systems had all of the correct setup information.
By using PING, it was possible to diagnose an intermittent timing problem with the network
card, which isn??™t a hard error and is extremely difficult to locate without the right tools.
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