1Gb NIC problems

Issues related to configuring your network
bore
Posts: 7
Joined: 2007/06/20 08:49:46

Re: 1Gb NIC problems

Post by bore » 2007/06/22 07:21:57

Thanks
I enabled Jumbo frames and now it runs significantly faster, however I faced the following problem
when I set the transmit site mtu to some value, the receive site mtu to the same value, the connection hangs
say if I set the receiving site to 7200, the transmit site to 7200 - hang
even if i set them to 3000 - hang
on 1500 work however
If I set one of the cards say to 7198 and the other to 7200 then it operates fine
Can u advise about that?
Also I used ifconfig mtu to enable jumbo frames
Can u asvise how to make that permanent trough restarts?

Thanks and regards
Boris

michaelnel
Posts: 1478
Joined: 2006/05/29 16:50:11
Location: San Francisco, CA

Re: 1Gb NIC problems

Post by michaelnel » 2007/06/22 17:01:17

[quote]
bore wrote:
Thanks
I enabled Jumbo frames and now it runs significantly faster, however I faced the following problem
when I set the transmit site mtu to some value, the receive site mtu to the same value, the connection hangs
say if I set the receiving site to 7200, the transmit site to 7200 - hang
even if i set them to 3000 - hang
on 1500 work however
If I set one of the cards say to 7198 and the other to 7200 then it operates fine
Can u advise about that?[/quote]

Sorry, I'd have to research it. Is your switch also configured for jumbo frames support?

[quote] Also I used ifconfig mtu to enable jumbo frames
Can u asvise how to make that permanent trough restarts?[/quote]

Yes.

Add an "MTU=xxxx" statement in your /etc/sysconfig/network-scripts/ifcfg-ethx script(s)

xbFlux
Posts: 2
Joined: 2007/07/19 21:09:38
Contact:

Re: 1Gb NIC problems

Post by xbFlux » 2007/07/19 21:32:31

Just an additive, but you may want to manually ensure your NIC is linked to the proper port configuration of your router.

[ root@mymachine $] ethtool eth0 autoneg on

or

[ root@mymachine $] ethtool eth0 autoneg off duplex full speed 1000

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