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TCP max bandwidth limited by firewall

NicolasDemonty
Beginner
Beginner

Hello all,

 

What parameters on a Cisco firewall FPR2140 connected in 10g (and I would say a firewall in general) could explain why a TCP flow is limited to between 370 and 430Mb/s while different test with iPerf showed the following :

- 1 TCP flow : max about 400Mb/s in average

- multiple TCP flows : multiple rates lower than 400Mb/s but sum about max 1Gb/s

- UDP : up to 4,2Gb/s

- TCP test without the FW in between : about 1,8Gb/s

 

thanks in advance

 

 

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