Quick Reference Guide

Reference Guide for the Model RT338 ISDN Router
12-4 Troubleshooting
Troubleshooting a TCP/IP Network Using a Ping Utility
Most TCP/IP terminal devices and routers contain a ping utility that sends an echo request packet
to the designated device. The device then responds with an echo reply. Troubleshooting a TCP/IP
network is made very easy by using the ping utility in the built-in Manager interface (Menu 24.4)
or in your PC or workstation.
Testing the LAN Path to Your Router
To verify that the LAN path to your router is set up correctly:
1.
Ping the router from your computer.
2.
On a PC running Windows 95 (or Windows 98 or Windows NT
®
), click the Start button and
select Run.
3.
In the box provided, type Ping followed by the IP address of the router, as in this example:
ping 192.168.0.1
4.
Click OK.
You should see a message like this one:
Pinging <IP address> with 32 bytes of data
If the path is working, you see this message:
Reply from < IP address >: bytes=32 time=NN ms TTL=xxx
If the path is not working, you see this message:
Request timed out
If the path is not functioning correctly, you could have one of the following problems:
• Wrong physical connections
— Make sure the Local LNK/ACT LED is on. If the LNK/ACT LED is off, follow the
instructions in “LAN Link LED” on page 12-2.
— Check that the corresponding Link LEDs are on for your network interface card and
for the hub ports (if any) that are connected to your workstation and router.
• Wrong network configuration
— Verify that the Ethernet card driver software and TCP/IP software are both installed
and configured on your PC or workstation.
Trouble.fm Page 4 Friday, October 6, 2000 5:31 PM