3Com Switch 4210 Series User Manual

Solving Fabric Formation Problems 51
another device on your network. 3Com suggests you use addresses in the range
192.168.0.0 to 192.168.255.255 with a subnet mask of 255.255.255.0.
These suggested IP addresses are part of a group of IP addresses that have been
set aside specially for use ‘in house’ only.
Solving Fabric
Formation Problems
If you are having problems with correctly forming a fabric, first ensure that
Spanning Tree is enabled. If it is enabled, do the following:
1 Power off all units in the fabric.
2 Check all the cable connections in the fabric.
3 Check the ports have been enabled as fabric ports.
4 Power on all units in the fabric.

3Com Switch 4210 Series Specifications

General

Model	3Com Switch 4210 Series
Layer	Layer 2
Management	CLI
VLAN Support	Yes
QoS	Yes
Jumbo Frame Support	Yes
Power Supply	Internal
Operating Temperature	0°C to 40°C
Relative Humidity	10% to 90% non-condensing
Uplink Ports	4 SFP ports (on 24-port model), 4 SFP ports (on 48-port model)
Dimensions (W x D x H)	440 x 260 x 44 mm (24-port model), 440 x 260 x 44 mm (48-port model)