Hello,
We have a Nexus 5020 with a FEX 2248. Server A is directly connected with 10G at the Nexus 5k and Server B with 1G at the FEX. Both servers are in the same Vlan and running with Linux (Ubuntu 11.10 and Scientific 6.1).
By running a bidirectional iperf-test, the throughput from Server B to A (1G to 10G) is 940 Mbits/sec and from Server A to B (10G to 1G) is only 140 Mbits/sec.
The performance from Server A to B is not favorable for e.g. a file server.
Can anybody help to optimize ?
Unidirectional tests give in both directions 940 Mbits/sec.
Thanks
