Ethernet Port Troubleshooting - 3Com 8807 Configuration Manual

Ethernet Port
Troubleshooting
[SW8800] interface gigabitethernet2/1/1
# Set the GigabitEthernet2/1/1 as a trunk port and allows VLANs 2, 6 through 50,
and 100 to pass.
[3Com-GigabitEthernet2/1/1] port link-type trunk
[3Com-GigabitEthernet2/1/1] port trunk permit vlan 2 6 to 50 100
# Create the VLAN 100.
[SW8800] vlan 100
# Configure the default VLAN ID of GigabitEthernet2/1/1 as 100.
[3Com-GigabitEthernet2/1/1] port trunk pvid vlan 100
Symptom 1: Default VLAN ID configuration fails.
Solution: Take the following steps:
Execute the display interface or display port command to check if the port
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is a trunk port or a hybrid port. If it is neither of them, configure it as a trunk or
hybrid port.
Then configure the default VLAN ID.
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Symptom 2: The port is in down status.
Solution: Please check
If the cable connection is correct and if the optical fiver cable is inversely
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connected.
If the shutdown command is used on the port.
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If the right optical module is inserted.
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Ethernet Port Troubleshooting

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