Troubleshooting; Leds - Dell PowerConnect 3048 User Manual

• If an untagged packet enters Port 1, the switch tags it with a VLAN tag
value of 2. It is then dropped since Port 1 has no membership with
VLAN ID 2.
• If a tagged packet with a VLAN tag value 10 enters Port 9, it has access
to Ports 1, 10, 11, and 12. If the packets leave Port 1 or 10, they are
tagged with a VLAN ID value of 10. If the packet leaves Port 11 or 12,
it leaves as an untagged packet.
• If a tagged packet with a VLAN tag value 1 enters Port 9, it is dropped
since Port 9 does not have membership with VLAN ID 1.

Troubleshooting

This section explains how to isolate and diagnose problems with the switch.
If you have a problem that is not listed here and you cannot solve it, contact
your supplier.

LEDs

The following sections discuss troubleshooting associated with the LEDs:
• All LEDs are off.
Check the following:
– The cable to connect the switch. Ensure that you are using an
RJ-45 (network) cable and not an RJ-11 (telephone) cable.
– Ensure that the power cord is firmly connected to the relevant
switch unit and to the supply outlet. If the connection is secure
and there is still no power, you may have a faulty power cord.
– Verify that there is sufficient space for adequate airflow on both
sides of the switch.
• On powering-up, the self-test LED lights orange.
– The relevant switch unit has failed its power on self-test because of
an internal problem. See
information.
"Technical Assistance" for more
NOTE: Operating
temperature for the
switch must not exceed
40ºC.
The switch should not be
placed in the direct
sunlight or near warm air
exhausts or heaters.
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