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 :-)