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LACP error's

Ronnie Hamilton_1
Frequent Advisor

LACP error's

Hi,

I have a number of 2650's at the edge but they seem to be reporting a lot of LACP error's 01/01/90 01:31:55 ports: port 29 is Blocked by LACP
01/01/90 01:31:55 ports: port 25 is Blocked by LACP
01/01/90 01:32:44 ports: port 22 is Blocked by LACP
01/01/90 01:33:05 ports: port 10 is Blocked by LACP
01/01/90 01:33:07 ports: port 22 is Blocked by LACP
01/01/90 01:33:09 ports: port 22 is Blocked by LACP
01/01/90 01:33:13 ports: port 22 is Blocked by LACP
01/01/90 01:33:25 ports: port 49 is Blocked by LACP
01/01/90 01:33:26 ports: port 10 is Blocked by LACP
01/01/90 01:33:29 ports: port 10 is Blocked by LACP
01/01/90 01:33:32 ports: port 10 is Blocked by LACP
02/28/06 19:02:32 ports: port 9 is Blocked by LACP
02/28/06 19:02:56 ports: port 9 is Blocked by LACP
02/28/06 19:02:59 ports: port 9 is Blocked by LACP
02/28/06 19:03:02 ports: port 9 is Blocked by LACP
03/01/06 08:04:26 ports: port 5 is Blocked by LACP
03/01/06 08:04:29 ports: port 5 is Blocked by LACP
03/01/06 08:04:32 ports: port 5 is Blocked by LACP
03/01/06 08:13:24 ports: port 22 is Blocked by LACP
03/01/06 08:13:47 ports: port 22 is Blocked by LACP
03/01/06 08:13:50 ports: port 22 is Blocked by LACP
03/01/06 08:13:54 ports: port 22 is Blocked by LACP
03/01/06 08:20:43 ports: port 10 is Blocked by LACP
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I know that LACP is enabled by default, but is there any reason I should be using it as I am not trunking ports at these switches

Ron
5 REPLIES
Matt Hobbs
Honored Contributor

Re: LACP error's

Hi Ron,

There's no reason to keep it enabled if you're not using any trunks.

The new ProCurve products such as the 4200 now have LACP disabled by default.

As a general troubleshooting method I often ask people to disable it if having any physical connection issues.

Matt
Ronnie Hamilton_1
Frequent Advisor

Re: LACP error's

Matt,

would I be right in saying that if I have 2 ports joined as a trunk from one switch to another I need LACP enabled on those ports or is it only required when I am using an LACP trunk.

ROn
Dmitry G. Spitsyn
Trusted Contributor

Re: LACP error's

Hi Ron !

You are right - so called dynamic LACP is enabled by default on all the ports of ProCurve devices, BUT the ports are in a passive mode of LACP, only listening LACP BPDUs.
If you like to aggregate ports into a trunk you should enable an active mode of LACP at least on one side of the physical links to be trunked.
The command is:
int 10-14 lacp active

Good luck,
Dmitry
Ronnie Hamilton_1
Frequent Advisor

Re: LACP error's

Guys

does LACP only have to be used with truks LACP not trunk.

ie trunk type LACP
if I am using trunk type trunk. I do not need to use LACP .

Is this correct, I think Im on the right track

ROn
Ralph Bean_2
Trusted Contributor

Re: LACP error's

Ron -

Correct.

The 2600 series switches offer two trunking alternatives:

1. LACP
2. 'Trunk (non protocol)'

See the manual at http://tinyurl.com/lugw5 , page 12-5.

Using the non-protocol type trunking will avoid the LACP delays (as LACP listens for an LACP partner) when Link comes up that others posters on this forum have reported.

Ralph