3com 9000 SX User Manual

Check that the SNMP Network Manager's IP address and community 
string are correctly configured and that the IP address of the Trap 
Receiver is configured properly on the Switch.

Check that Telnet access or SNMP access is enabled.

Check that the port through which you are trying to access the device 
has not been disabled. If it is enabled, check the connections and 
network cabling at the port. 

Check that the port through which you are trying to access the device 
is in a correctly configured VLAN.

Try accessing the device through a different port. If you can now access 
the device, a problem with the original port is indicated. Re-examine 
the connections and cabling.

There may be a network problem preventing you accessing the device 
over the network. Try accessing the device through the console port.

Check that the community strings configured for the Switch and the 
network manager are the same.

Check that SNMP access was not disabled for the Switch.

If you have made a permanent entry in the FDB, which requires you to 
specify the VLAN to which it belongs and then delete the VLAN, the 
FDB entry will remain. Though causing no harm, you must manually 
delete the entry from the FDB if you wish to remove it.

If you have defined static or default routes, those routes will remain in 
the configuration independent of whether the VLAN and VLAN IP 
address that used them remains. You should manually delete the routes 
if no VLAN IP address is capable of using them.

SW9000.BK  Page 3  Wednesday, April 1, 1998  11:00 AM