Download Cabletron Systems Cabletron SmartSwitch Router 250 User`s guide

Troubleshooting Checklist
Table 4-2
Troubleshooting Checklist (Cont’d)
Problem
Possible Cause
Recommended Action
Cannot contact
the 2H253-25R
through in-band
management.
IP address not assigned.
Refer to the SmartSwitch Series
2E253, 2H252, 2H253, and 2H258
Local Management User’s Guide for
IP address assignment procedure.
Port is disabled.
Enable port. Refer to the SmartSwitch
Series 2E253, 2H252, 2H253, and
2H258 Local Management User’s
Guide for instructions to
enable/disable ports.
No link to device.
1. Verify that all network connections
between the network management
station and the 2H253-25R are valid
and operating.
2. If the problem continues, contact
Cabletron Systems for assistance.
Loop condition detected.
1. Verify that Spanning Tree is
enabled. Refer to the SmartSwitch
Series 2E253, 2H252, 2H253, and
2H258 Local Management User’s
Guide for the instructions to set the
type of STA.
2. Review network design and delete
unnecessary loops.
3. If the problem continues, contact
Cabletron Systems for assistance.
Port(s) goes into
standby for no
apparent reason.
4-6
Troubleshooting