IP path trace pdf

1. ALM-25898 IP Path Excessive Packet Loss Rate
Description
This alarm is reported when the average packet loss rate is higher than the preset alarm threshold during 10 minutes, in the case that the IP PM function is activated on the uplink
of the IP path.
Parameters
Parameter Name Parameter Description
Cabinet No. Cabinet number of the faulty board
Subrack No. Subrack number of the faulty board
Slot No. Slot number of the faulty board
IP Path No. IP path number
Packet Loss Rate (per mill) Packet loss rate of the IP path
Description Peer description information
Impact on the System
Alarm Severity Alarm Impact
Minor The data packet on the link between the NE and the RNC is discarded, and the services carried on this IP path cannot be performed
normally.
System Actions
None
Possible Causes
• The bandwidth configuration of the IP path on the NE side is inconsistent with that on the RNC side.
• The bit error rate (BER) or frame error rate (FER) of the link bearing the IP path is extremely high.
• The bandwidth of the physical link between the NE and the RNC is restricted.
Procedure
1. Check that the bandwidth of the IP path is configured correctly.
a. Run the MML command LST IPPATH to check whether the receive bandwidth and transmit bandwidth of the IP path are consistent with those configured
on the RNC .
Y=> The parameter settings are consistent. Go to step 2.
N => The parameter settings are inconsistent. Go to sub-step b.
b. Reconfigure the receive bandwidth and transmit bandwidth of the IP path to keep them consistent with those configured on the RNC.
Wait for 10 minutes.
Check whether the alarm is cleared.
Y => The alarm is cleared. No further action is required.
N => The alarm is not cleared. Go to step 2.
2. Check for the correlated alarm of the link bearing the IP path on the M2000.
a. On the M2000, check for the correlated alarm of the link bearing the IP path:
Ethernet-correlated alarms
PPP/MLPPP-correlated alarms
Y => The correlated alarm exists. Go to sub-step b.
N => The correlated alarm does not exist. Go to step 3.
b. Clear the correlated alarm with recommended actions.
Check whether the alarm is cleared.
Y => The alarm is cleared. No further action is required.
N => The alarm is not cleared. Go to step 3.
3. Check the bandwidth of the physical link between the NE and the RNC.
a. Contact the network plan engineers to check whether the configured bandwidth of the link between the RNC and the NE meets the service requirements.
If the configured bandwidth cannot meet the service requirements, the network replan is required.
b. Increase the link bandwidth according to the network replan.
Check whether the alarm is cleared.
Y => The alarm is cleared. No further action is required.
N => The alarm is not cleared. Contact Huawei Customer Service Center.
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