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LACP blocking static link to server

NelsonC2
Advisor

LACP blocking static link to server

I have a procurve 4104gl, which I have set up a LACP static trunk to the server. The the server has a Intel Pro 1000 NIC configured for static LACP. The connection is great until I reboot the server. After rebooting the switches "show lacp" command shows that the trunk to the server is blocked. I have no STP running, and it only happens after shuting down or rebooting the server. To fix the connection I have to disable and then re-enable the ports in the switch. Does anyone know what is happening?
12 REPLIES
Stuart Teo
Trusted Contributor

Re: LACP blocking static link to server

How many ports are in the LACP trunk? Also what speed? e.g. 2x100, 3x100, 2x1000, etc...
If a problem can be fixed, there's nothing to worry. If a problem can't be fixed, worrying ain't gonna help. Bottom line: don't worry.
Les Ligetfalvy
Esteemed Contributor

Re: LACP blocking static link to server

>I have no STP running
Run a network trace to be sure. More often than not, BPDUs are discovered to be floating around where none were thought to exist. Maybe you will even find some rogue WAPs. ;)
Carsten M
Regular Advisor

Re: LACP blocking static link to server

What is, when LACP by the Switchports are dynamic and by the server a) dynamic and b)statisch.
cm60
NelsonC2
Advisor

Re: LACP blocking static link to server

I sniffed my network using Ethereal. I saw that BPDU's are being sent across the network. I have verified all of my switches have no STP running. The sniffer gives the mac for an HP device, and I can't find it in any mac table on any of my switches. Any thoughts?
NelsonC2
Advisor

Re: LACP blocking static link to server

I resolved the issue with the STP BPDU's.
Stuart Teo
Trusted Contributor

Re: LACP blocking static link to server

so what did you find?
If a problem can be fixed, there's nothing to worry. If a problem can't be fixed, worrying ain't gonna help. Bottom line: don't worry.
NelsonC2
Advisor

Re: LACP blocking static link to server

I still have a problem with the static lacp connection to the server. The NIC seems to disconnect for about 10 seconds at reboot. I was going to try another NIC to see if that will fix my problem. The wierd thing is if I unplug the connecton to the switch before rebooting, and then plug it back in after reboot, the connection comes up. It seems some kind of parameter is being passed at POST boot of the server.
Matt Hobbs
Honored Contributor

Re: LACP blocking static link to server

Going back to what Carsten mentioned, have you tried just leaving the switch ports as their default of passive LACP?

When configuring NIC teaming on ProLiants in the past, I've just set them to 'Automatic' and left the switches as is. The ProLiant will go into an LACP Active mode and the switch should then create a dynamic LACP trunk. I've done this a fair few times in the past with different model ProCurves and it's worked great. I also tried with Intel ProSet which worked well.

More info on the ProLiant NIC teaming - ftp://ftp.compaq.com/pub/products/servers/networking/TeamingWP.pdf

NelsonC2
Advisor

Re: LACP blocking static link to server

Matt,When you setup the Intel Proset teaming, which mode did you use?
Matt Hobbs
Honored Contributor

Re: LACP blocking static link to server

From memory it was the 802.3ad Dynamic mode that I used.
NelsonC2
Advisor

Re: LACP blocking static link to server

I put the switch back in default passive mode and set up the Intel Pro 1000 for Auto Load Balancing (ALB), which also has fault tolerence. Thanks
BOVC
Advisor

Re: LACP blocking static link to server

Did that solve your problem? Cause I'm experiencing the exact same thing...

Rasmus