Connection Problems, Test the ATM Circuit

SpeedStream Dual USB/Ethernet Router User’s Guide

Model 5667

Carrier Not Detected – Not Lit

If the Ethernet LED is not lit, check the connection on the other end of the Ethernet cable.

Carrier Detected - Solid Green

There are conditions in which the Ethernet link will not be operational when the green Ethernet LED is lit. The Ethernet interface on the host computer or hub connected to the router's Ethernet port should be set to half-duplex, no auto-negotiation. Otherwise connectivity problems can arise. Examining the Ethernet statistics that will indicate a one-sided connection usually can see this.

STEP 2: Test the ATM Circuit

Use the ATM ping command to send OAM loopback cells on the VPI/VCI that you believe is correct. The Network Service Provider at the other end of your connection will be using a specific VPI/VCI (often it is set to 8/35). If you think you have the VPI/VCI set properly, you can use atmping command to send out cells on a different channel to see if there is a response.

STEP 3: Check for IP Routing Problems

IP routing problems usually are the result of something being misconfigured. Check the following functions:

•Execute the ping command to see if the destination IP address is alive.

•Make sure the default route (IP gateway) is defined correctly. It must be on the same subnetwork as your router.

•Check to see that there are static routes set up to the specified network.

•Check whether the Routing Information Protocol (RIP) is supplying information or supplying erroneous information.

•If Firewall is enabled, and not snoozing, IP packets will stop at the router depending upon the level at which the firewall is running. Check the Firewall configuration. Firewall events are logged to the console.

Connection Problems

If you cannot connect your PC to the target router for configuration:

For a LAN connection, verify that the router’s IP address matches the IP address previously stored into the router’s configuration. You must have previously set the router’s Ethernet LAN IP address and subnet mask, saved the Ethernet configuration changes, and rebooted the router for the new IP address to take effect.

Check that your LAN cable is pinned correctly and each pin end is securely plugged in.