Issue Description
version:AR2200 V200R003C01SPC300
topology:
![]()
problem description:
AR use E1 connect Nortel PBX, E1 work as PRA, but the PRA link will regular down around each 1 hour. after 2 minutes the E1 will resume automatic.
these are the PRA configuration:
set workmode slot 1 e1t1 e1-voice
trunk-group Nortel dss1-net
enterprise CEFA dn-set Central
call-right in international-toll out international-toll
trunk-pra 1/0/0
Alarm Information
Sep 23 2013 20:34:51-06:00 CF-VOICE-02 %%01VOICE/4/TRUNK_STATE(l)[0]:[STRING]
Sep 23 2013 19:25:29-06:00 CF-VOICE-02 %%01VOICE/4/TRUNK_STATE(l)[1]:[STRING]
Sep 23 2013 18:17:26-06:00 CF-VOICE-02 %%01VOICE/4/TRUNK_STATE(l)[2]:[STRING]
Sep 23 2013 17:10:54-06:00 CF-VOICE-02 %%01VOICE/4/TRUNK_STATE(l)[3]:[STRING]
Sep 23 2013 16:10:13-06:00 CF-VOICE-02 %%01VOICE/4/TRUNK_STATE(l)[4]:[STRING]
Handling Process
1 : first the issue is regularity, around 1 hour, and take 2 minutes will resume;
So we consider the VE1 physics layer have problem, check the VE1 status at next time it happen:
Huawei]display voice port ve1 state 1/0/0
Port VE1 state: 2/0/0
PTPSrvState : Line abnormal ----------here is the VE1 physics layer, “Line abnormal” is mean the physics layer abnormal
PTPAdmState : NoLoop,NoTest
CTPDState : Release ---------- here is the VE1 protocol status
LOS : No alarm
AIS : No alarm
LFA : No alarm
LMFA : No alarm
RRA : RRA alarm ---------here has RRA alarm
CRCERR : No alarm
From these informations, because the RRA alarm, lead to the VE1 regularity link down. But the clock synchronization is a very important reason lead to RRA alarm.
2: second we check the clock synchronization :
there are no clock configure, add the clock synchronization configuration like this:
[Huawei]clock source 9 1/0/0 priority 9
after configure the clock, the RRA alram is disappear, and the service is work normal.
Suggestions
when use PRA, need confirm the clock synchronization.
