I have a problem about out of buffers while using T4240rdb as a router, any idea will be appreciated.
Below I will try to explain the case.
I am using T4240rdb with SDK 2.0 and using IXIA as a packet generator.
I am sending packets at high rate from IXIA to 10g interface fm2-mac10 , and at the same time I am pinging the 1G interface fm1-mac1. After 10 seconds I am getting reply timeouts from fm1-mac1 .
When I looked at the statistics of fm2-mac10 and fm1-mac1 the "FMBM_RODC – Out of Buffers Discard Counter" are increasing and the CPUs load is %100. I assumed that ingress packets at this rate could not be processed and normally out of buffer occurs and the packets are dropped at both at fm2-mac10 and fm1-mac1.
My question is : Despite fm1-mac1 and fm2-mac10 are belongs to different FMANs why out of buffer at fm2-mac10 cause packet drops at fm1-mac1. I am asking this question because packets of fm1-mac1 are critical and I want them not not to drop, fm2-mac10 packets could be dropped.
Is there any way to avoid dropping fm1-mac1 packets at this case ?
Maybe If I could succeed to to separate the external buffers of fm1-mac1 and fm2-mac10 I will avoid packet drop at fm1-mac1. Is there any way to separate bman buffers for these MAC interfaces?