NOTE
Query the statistics of the faulty port multiple times (recommended: 10 times) and then compare the
statistics to check whether packet loss occurs on the subscriber line. The query interval is 20s.
Run the
display port statistics portid
command on the MA5612 to query all the performance statistics of
the subscriber line after the subscriber line is initialized. Then, check whether the number of CRC error
frames increases. If it increases, packet loss is occurring on the subscriber line.
2.
Check whether the physical line between the MA5612 and the user terminal is connected
properly or whether the line is old. Reconnect the line properly or replace the line as needed.
Then, check whether the Internet access is normal.
l
If the Internet access is normal, go to
l
If the Internet access is low, go to
Step 4
Check whether unknown traffic is occupying the bandwidth on the MA5612.
1.
Ensure that the user is not accessing the Internet. Run the
display port statistics portid
command to query the statistics of the Ethernet port multiple times (recommended: five
times). The query interval is 20s.
l
If the upstream or downstream traffic increases rapidly, unknown traffic is occupying
the bandwidth. Go to
.
l
If the upstream or downstream traffic does not increase, go to
.
NOTE
Normally, the query results should be similar when the user is not accessing the Internet.
l
Number of transmitted octets
: Indicates the current downstream traffic of the user.
l
Number of received octets
: Indicates the current upstream traffic of the user.
2.
Use packet-capturing software, such as Ethereal, to capture packets on the user's PC,
confirm the known traffic source, and then eliminate the unknown traffic source. You can
eliminate the unknown traffic source by checking whether the PC sending the unknown
traffic is infected with viruses. Then, check whether the Internet access rate is restored.
l
If the Internet access rate is restored, go to
.
l
If the Internet access is not restored, go to
Step 5
Check the maximum rate configured for the user.
1.
Run the
display service-port
command to query the indexes of the traffic profiles in the
receive and transmit directions configured for the service port.
2.
Run the
display traffic table ip
command to query the corresponding traffic profile. Then,
check whether the committed information rate (CIR) reaches the bandwidth that the user
applied for.
l
If the CIR is less than the bandwidth that the user applied for, the traffic profile bound
to the user is incorrect. Go to
.
l
If the CIR is equal to the bandwidth that the user applied for, go to
3.
Run the
undo service-port
command to delete the service port of the user. Then, run the
service-port
command to reconfigure a service port for the user and bind the user to the
proper traffic profile. Check whether the Internet access rate is restored.
l
If the Internet access rate is restored, go to
.
l
If the Internet access rate is not restored, go to
SmartAX MA5612 Multi-service Access Module
Maintenance Guide
4 Troubleshooting Services Transmitted Through a GE Port
Issue 01 (2012-07-25)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
46
