N - Series - loop protection

Hello

How exactly loop protection on N-series books?

I test the behavior on N2048P and it looks like the following:

When I connect two ports (botch are configured in the access mode in the same VLAN) via a cable, after a while the two ports are disabled and the following messages are written in the newspapers:

<189>18 Jul 18:48:04 10.10.0.1 - 1 TRAPMGR [trapTask]: traputil.c (721) 33665 per cent on item in gi1/0/13 link is down
<189>18 Jul 18:48:04 10.10.0.1 - 1 TRAPMGR [trapTask]: traputil.c (721) 33664 %% Link Down: item in gi1/0/13
<189>18 Jul 18:48:04 10.10.0.1 - 1 TRAPMGR [trapTask]: traputil.c (721) 33663 %% link on article gi1/0/14 is down
<189>18 Jul 18:48:04 10.10.0.1 - 1 TRAPMGR [trapTask]: traputil.c (721) 33662 %% Link Down: item in gi1/0/14
<189>18 Jul 18:48:04 10.10.0.1 - 1 TRAPMGR [trapTask]: traputil.c (721) 33659 %% link on Vl1 can't
<189>18 Jul 18:48:04 10.10.0.1 - 1 TRAPMGR [trapTask]: traputil.c (721) 33658 %% Link Down: Vl1
<189>18 Jul 18:48:04 10.10.0.1 - 1 TRAPMGR [loopProtectTask]: traputil.c (763) 33657% loop detected on port:
<189>18 Jul 18:48:04 10.10.0.1 - 1 TRAPMGR [loopProtectTask]: traputil.c (763) 33656% loop detected on port:
<189>18 Jul 18:47:39 10.10.0.1 - 1 TRAPMGR [trapTask]: traputil.c (721) 33649 %% Link Up: item in gi1/0/13
<189>18 Jul 18:47:39 10.10.0.1 - 1 TRAPMGR [trapTask]: traputil.c (721) 33648 %% Link Up: Vl1
<189>18 Jul 18:47:39 10.10.0.1 - 1 TRAPMGR [trapTask]: traputil.c (721) 33647 %% Link Up: item in gi1/0/14

I couldn't find all the details on this mechanism in the N-series documentation.

I'm curious to know if it is possible to customize to meet the threshold of better times etc. - depends on the situation.

Kind regards

Jakub

Looking into this a little further, looks like there is a command added in 6.3.0.1 and newer firmware.

# errdisable recovery cause

and

the errdisable recovery interval #.

These commands should enable you to change the behavior of loop protection. Take a look at page 491 of the CLI guide and let me know what you think.

http://Dell.to/1SVu3Bp

Tags: Dell Tech

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