LACP error's

[Ronnie Hamilton_1]

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

[Matt Hobbs]

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]

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]

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]

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]

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