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3. Troubleshooting Functional Failures in Operation
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Table 3-7: Check and Action for Port Status
(3) Checking statistical information
Enter the show port statistics command to check the number of sent/received packets and the number of
discarded packets on all ports installed on this system.
No. Port Status Problem Action
1 active up The port is operating normally. None
2 active down Line failure occurred in the port. According to the log of the port displayed by the show logging
command, see the corresponding part in manual "Message Log
Reference" and follow [Action] described.
3 inactive The inactive state is set by one of the
following:
• The inactivate command
• Standby link of link aggregation
• BPDU guard function of a spanning
tree
• GSRP port-reset function
• Failure detected by the IEEE802.3ah/
UDLD function
• Port blocked by L2 loop detection
function
• Port blocked by the storm control
function
• If the inactive state is set by standby link function of link
aggregation, it is a normal operation and therefore do not set the
active state using the activate command. Check standby link
function using the show channel-group command with
"detail" parameter specified.
• If the inactive state is set by the BPDU guard function of a
spanning tree, review the configuration of the opposite system.
Set up the configuration so that this system will not receive
BPDU. Using the activate command, set the port to the active
state. Check BPDU guard function using the show
spanning-tree command with "detail" parameter specified.
• If the inactive state is set by the port reset function of GSRP, the
active state automatically restores. Since this is a normal
operation, do not set to the active state using the activate
command.
• If the inactive state is set by detection of one-way link failure or
L2 loop by IEEE802.3ah/UDLD function, see
"3.18 Communication Failure on IEEE802.3ah/UDLD Function."
After recovery from failure, use the activate command to
activate the port.
• When ports blocked by L2 loop detection function are in inactive
status, change the configuration, which causes the loop. And then
enable the inactive port by using the activate command. At
this time, if loop-detection auto-restore-time has
been set by the configuration command, the ports will change
status to active status automatically.
• If the inactive state is set by the storm control function, use the
activate command to activate the port after LAN recovered
from the storm.
• If you want to set the active in any other case, confirm that the
cable is connected to the port to be used and use the activate
command to activate the port.
4 test The port is in the line test by the test
interfaces command.
To restart communication, execute the no test interfaces
command to stop the line test and activate the port with the
activate command.
5 fault Hardware of the port is faulty. According to the log of the port displayed by the show logging
command, see the corresponding part in manual "Message Log
Reference" and follow [Action] described.
6 initialize The port is being initialized. Wait until initialization completes.
7 disable or
locked
Configuration command shutdown is
set.
Confirm that the cable is connected to the port to be used and enter
configuration command no shutdown to activate the port.