[j-nsp] m120 packet size limit ? or another limit ?

[Piotr]

Hello

I think i have problem with performance on m120 (9.6R2.11) I have only 
one card 10GE cfpc ( router on stick). Normaly traffic is about 3Gb/s in 
+ 3Gb/s out and there is no problem. When i start serving wms, windows 
media services, i have about 6Gb/s in both direct and in peak time 
packet loss (about 1%), congestion error on the switch where m120 is 
connected (ca 5000 errors/s).

 From wms i have about 3Gb/s traffic and about 300k packets with average 
size of packet 1300 bytes. I have also 200k packets in opposite direct 
but with much lower size.

 From entire router i have 1,1 mln packets in one direct, in both direct 
it's 2,2 mln in peak time

When i add second card to router, cfpc, and vlan with streaming shift to 
new card, everything is ok, there is no packet loss, no congestion errors.

On M120 i don't have any qos, any problems in log, low cpu on re, i 
don't see any errors on interface extensive.

There is some limit in packet size wich M120 can have problem ? Or 
another limit involve with only one card in router ?

Thanks for help
Piotr

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