Application Note: Configuring the IPLink™ Router for Dual Routed Application
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– For the physical links to be free of alarms and errors, the minimum parameters must match those of the
provider’s E1 configuration-number of time slots, clear channel or structured E1, line coding, termina-
tion impedance which is 75 Ohms for coaxial and 120 Ohms for twisted pair physical media.
3.
Once the physical layer is up, the next checks apply to the Datalink layer, layer 2. Look at the Summary
and Connect State information on the I
Edit ’PPP’
page.
– If it is not connected, determine whether the link is in the process of connecting or dead. If dead, the
remote end may be causing a problem. If it is trying to connect without success, it may be a synchroni-
zation problem which may be caused by an error in the clocking mode of the E1 configuration. Rarely
should you need to change the other parameters. In fact, it is best not to change parameters like LCP
Max Configure, LCP Max Failure, and LCP Max Terminate. Any changes to these parameters can cause
erratic and unreliable connections.
4.
If the PPP link is UP and connected, you may not be able to transfer data from an ill-configured routing
table. Be aware of the ping’s response to the attempted ping. The messages “Request timed out” and “host
destination not available” indicate different routing problems. Hence the importance to understand their
meaning and where in the routed path, the ping is failing.
5.
You can also issue a ping or traceroute command from the IPLink. Under the System Configuration menu,
click on the Tools link for issuing Pings and Traceroute commands from the IPLink.
Date Created
March 1, 2006
Last Updated
March 31, 2006 3:51 pm
7622 Rickenbacker Drive
Gaithersburg, MD 20879
Tel: +1 301.975.1000
Fax: +1 301.869.9293
