TCP maximum window sizes. Application socket buffer sizes.
Fix those and re-test! Adrian On Fri, Nov 26, 2010, Harris Hui wrote: > > > Hi > > Does anyone have experience on design / implementing the Jumbo frame > enabled network? > > I am working on a project to better utilize a fiber link across east coast > and west coast with the Juniper devices. > > Based on the default TCP windows in Linux / Windows and the latency between > east coast and west coast (~80ms) and the default MTU size 1500, the > maximum throughput of a single TCP session is around ~3Mbps but it is too > slow for us to backing-up the huge amount of data across 2 sites. > > The following is the topology that we are using right now. > > Host A NIC (MTU 9000) <--- GigLAN ---> (MTU 9216) Juniper EX4200 (MTU 9216) > <---GigLAN ---> (MTU 9018) J-6350 cluster A (MTU 9018) <--- fiber link > across site ---> (MTU 9018) J-6350 cluster B (MTU 9018) <--- GigLAN ---> > (MTU 9216) Juniper EX4200 (MTU 9216) <---GigLAN ---> (MTU 9000) NIC - Host > B > > I was trying to test the connectivity from Host A to the J-6350 cluster A > by using ICMP-Ping with size 8000 and DF bit set but it was failed to ping. > > Does anyone have experience on it? please advise. > > Thanks :-) -- - Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid Support - - $24/pm+GST entry-level VPSes w/ capped bandwidth charges available in WA -