NEC IP8800/S2400 Manuale Utente

3.   

Troubleshooting Functional Failures in Operation

28

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 
"

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.