Troubleshooting Network Connectivity Problems - 3Com 2103R-CSDI Installation Manual

Troubleshooting
Network
Connectivity
Problems
If the Edge Router module does not appear to be routing traffic properly on
the network, it may indicate that there is no connection to the network.
Try performing one or more of the following troubleshooting actions:
For ONline and ONcore Edge Router modules only, use the 3Com
management interface (for example, ONline management module) to verify
that the Edge Router module backplane port is set to the appropriate
backplane network (channel).
Using the Cisco terminal interface, verify that the following parameters are
set correctly:
IP address
Subnet mask
Default gateway
Use the ping utility to confirm that there is network connectivity.
Use the
cisco>show interfaces ethernet 0
the interface is up and running. This command reports Ethernet statistics
that aid you in troubleshooting the network.
If the interface is down, you may need to use the Cisco configuration editor
to issue the
no shutdown
restarts a disabled interface.
Verify that your router configuration is valid. Refer to the Cisco Systems
Troubleshooting Internetworking Systems guide for more information.

Troubleshooting Network Connectivity Problems

command. The no shutdown command
5-3
command to verify that