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Server to Client results for 10 gigabit very slow


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  • From: David Leibfritz <>
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  • Subject: Server to Client results for 10 gigabit very slow
  • Date: Tue, 13 Aug 2013 12:44:02 -0400 (EDT)

When running NDT tests for 10 gigabit connections the client-to-server results
are what we expect, 5+ gigabit/s, but the server-to-client is less than 1
gigabit/s. Can you explain why or how we resolve this. Running NDT tests for
1 gigabit/s connections are consistent in both directions. Below is an
example or our 10 gigabit NDT tests:

running 10s outbound test (client-to-server [C2S]) ..... 5709.95Mb/s
running 10s inbound test (server-to-client [S2C]) ...... 898.46Mb/s

The slowest link in the end-to-end path is a 10 Gbps 10 Gigabit
Ethernet/OC-192 subnet



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