Hi Harris, > However, increasing the MTU size on both the J6350s may not be able to get a > better TCP throughput, because the Host NICs and Switchport are also using > MTU 1500 right? Should I change the MTU size on Host NICs and Juniper EX > switches to MTU 9018 in order to prevent the frame fragmentation happened > below 9018? >
There should be no more drops if your end devices are 1500 MTU and the "core" network is 9018. As for your throughput, that is a little harder to calculate, but the figures you are quoting seem quite low even with 80 ms latency. Latency aside, you should be able to easily saturate a 100Mbps pipe with 1500 byte frames on a J6350 without issue (in terms of PPS). I don't believe adjusting the MTU size is going to make that much difference, but it is worth trying. I would be inclined to kick off iperf with a UDP test with 1500 byte frames to see what throughput you can get out of the pipe first, then start investigating TCP/MSS issues. Cheers, Ben _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
