Solving Communication Problems - 3Com 3226 User Manual

48 C 4: P
HAPTER ROBLEM
Solving
Communication
Problems
S
OLVING
If more than one fan has failed in the Switch, a warning message will
generate a RMON Trap.
If a fan failure warning message is generated:
1 Power off the unit.
2 Check that the air vents are not obstructed.
3 Power cycle the unit. To do this, remove and reconnect the AC mains
supply.
4 If another fan failure warning message is generated via the RMON trap,
return the unit.
If you experience communication problems with the Switch, ensure that:
The Switch IP address has been configured as described in Chapter 3.
If the Switch is separated from your management application by a
router, ensure that the default gateway IP address within the Switch is
the same as the IP address of the router.
The Switch's IP address has been entered correctly in your network
management application (such as 3Com Network Supervisor).
The following is a brief overview of IP addressing, and how to obtain a
registered IP address.
IP Addressing
To be managed correctly, each device on your network (for example a
Switch or Hub) must have a unique IP address. IP addresses have the
format n.n.n.n where n is a decimal number between 0 and 255. An
example IP address is 192.168.100.8.
The IP address is split into two parts:
The first part ('192.168.100' in the example) identifies the network on
which the device resides
The second part ('.8' in the example) identifies the device within the
network
The natural subnet mask for this example is 255.255.255.0.