Teaming - Losing connection with server problem

crazyswede · 1 Jul 2010 at 10:19

We have a servers with a 4 port network adapters and we have teamed them to increase the bandwidth. The problem is that every so often the connection is lost so there is 'write delay failure' which causes corruption or certain programs stop replaying files (Constant depending on program). If we stop the teaming and use one port connection all the problems disappear.

The servers are connected to Dell PowerConnect 6248 managed switches. Is there something I should setup on the switches for the teaming to work or is there something in the teaming setting on the adapter drivers I got to look out for?

All this is quite new for me so please be patient, thanks

SMN · 1 Jul 2010 at 10:24

Do you know what it is using to "team" the NIC's? Generally it will be a variant of round robin or LACP (802.3ad).

Also, do you know what protocol your application/program is using? If its TCP based (connection-orientated) it will be Port1 to Port22 on the Powerconnect, point-to-point. When port1 "dies", the connection will fail, and the TCP session re-established to Port2 generally.

crazyswede · 11 Oct 2010 at 17:37

I have been away so I am now trying to sort out all the issues.

Using 'Smart Load Balancing(TM) and Failover'

All the team type options:

Smart Load Balancing(TM) and Failover
Generic Trunking (FEC/GEC) 802.3ad-Draft Static
Link Aggregation (802.3ad)
SLB (Auto-FallbacK disable)

Is there any good software that I can use for testing and hopefully replicating the problem?

Sone · 11 Oct 2010 at 18:02

checked settings are the same on the switches?

crazyswede · 12 Oct 2010 at 09:44

The only thing I recognise in the switch settings is Link Aggregation settings which I am not using. Is it better to use 'Link Aggregation ' than 'Smart Load Balancing(TM) and Failover'?