Re: Intel 82576 Gigabit on Debian 7 slow speed.

[Michael Beck <eliteknipser@gmail.com>]

> Am 18.12.2015 um 12:35 schrieb Mimiko <vbvbrj@gmail.com>:
> 
> Hello.
> 
> I've bonded two onboard Intel 82576 Gigabit networks on an supermicro server for load balancing (round-robin). It is working, but transfer rate is about 10-20MB/s, while on same type of server the same configuration in windows I get around 100MB/s.
> 
> cat /proc/net/bonding/bond0
> Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
> 
> Bonding Mode: load balancing (round-robin)
> MII Status: up
> MII Polling Interval (ms): 100
> Up Delay (ms): 200
> Down Delay (ms): 200
> 
> Slave Interface: eth0
> MII Status: up
> Speed: 1000 Mbps
> Duplex: full
> Link Failure Count: 0
> Slave queue ID: 0
> 
> Slave Interface: eth1
> MII Status: up
> Speed: 1000 Mbps
> Duplex: full
> Link Failure Count: 0
> Slave queue ID: 0
> 
> I've tried disable bond and leave only eth0, same result. I've tried to update to backported newer kernel with no success. Copying with via ssh is same speed. If lots of users starts to use the samba shares, even ssh lags.
> 
> What could be the problem?
> 
> Thank you.
> 

Hi,

Any lost packets? 
Real real full-duplex (ethtool)?
What does the (managed?) switch say? 
Are the cables okay (cat6?)?
Which kind of transfer?nfs/cifs/iscsi or raw iperf-test?

Gruß,

Michael Beck