Issue Description
AR3200 V200R002C001SPC200 with SRU 80 and 8FE1GE
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AR3260's Device status:
Slot Sub Type Online Power Register Alarm Primary
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
6 - 8FE1GE Present PowerOn Registered Normal NA
15 - SRU80 Present PowerOn Registered Normal Master
11 - PWR350A Present PowerOn Registered Normal NA
16 - FAN Present PowerOn Registered Normal NA
topology:
BGP peer ------------- trunk on LAN card ---------- BGP config AR3200 SRU 80 FULL routing table
BGP peering was through LAN card connection.
From time to time device was rebooting.
Alarm Information
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===============display reset-reason===============
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The MPU frame[0] board[15]'s reset total 10, detailed information:
-- 1. 07/11 02:11:42, Reset No.: 10
Reason: Reset for memory use out
-- 3. 04/22 02:14:34, Reset No.: 8
Reason: Reset for memory use out
11 2013 02:10:43+00:00 xxxxxxENTITYTRAP/2/MEMORYUSAGERISING:OID 1.3.6.1.4.1.2011.5.25.219.2.15.1 Memory utilization exceeded the pre-alarm threshold.(Index=1572873, HwEntityThresholdIndex=0, HwEntityPhysicalIndex=1572873, PhysicalName="Board 6", EntityThresholdType=1, EntityThresholdWarning=95, EntityThresholdCurrent=95, EntityTrapFaultID=145152)
Handling Process
Shut down lancard, and move bgp connection to built-in AR 3200 WAN interfaces. This solve the problem.
Another solution - upgrade V200R003C01SPC900 or later system software. meomory synchornization problem is solved on with this version
Root Cause
When we are using the LAN side card 8FE1GE to connect through BGP, router is having issues with the memory.
Lancard 8FE1GE will try to import the routes received from BGP peer but, because the hardware capacity is only 4k, it will not succeed, and will need to access RAM, occupy internal bus… BGP process will not be efficient and because we are talking about full routing table and high requirements, malfunction appear.
