Cabletron Systems 2H253-25R manual Series 2E253, 2H252, 2H253, and, 2H258 Local Management User’s

Troubleshooting Checklist

Table 4-2 Troubleshooting Checklist (Cont’d)

Problem	Possible Cause	Recommended Action
Cannot contact	IP address not assigned.	Refer to the SmartSwitch Series
the 2H253-25R		2E253, 2H252, 2H253, and 2H258
through in-band		Local Management User’s Guide for
management.		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.
Port(s) goes into	Loop condition detected.	1. Verify that Spanning Tree is
standby for no		enabled. Refer to the SmartSwitch
apparent reason.		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.

4-6Troubleshooting