[c-nsp] L2 STP issue.

[P.A]

Jens, I was able to find some HP documents describing the problems and
workarounds for cisco to hp.
It's def a STP interoperability issue.


Paul


-----Original Message-----
From: Jens S Andersen [mailto:jsa at adm.aau.dk] 
Sent: Thursday, May 06, 2010 3:16 AM
To: P.A
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] L2 STP issue.

Hi

As far as I recall these HP switches do not support per-vlan spanning tree.


-Jens

>Hi, hoping someone has some suggestions.

>I ran into an issue where I have a ring of 4 HP2512 and 1 HP2524 switches.
>These switches all connect back to a Cisco 6509.

 

>IOS (tm) s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version
>12.2(18)S

>XF14, RELEASE SOFTWARE (fc1)

 

>The cisco 6509 is running rapid-pvst and the HP switches are running rstp.
>The cisco was the root bridge and all HP's saw the cisco as the bridge
>however I ran into issues where everything would work as expected for
>several minutes, 7 -10 min, and then parts of the network would become
>inaccessible all of the sudden without it ever bring up a redundant path. I
>also saw numerous STP topology changes etc on the HP switches while this
was
>going on.

 

>When I 1st brought this online I tested it by bringing down a link and STP
>saw the change and calculated an new path through STP. I figured this was
>working well but then I started having the issues mentioned above. One
thing
>I wanted to mention this ring of HP switches is connected through wireless
>links using ceragon and a net-2-net t3 to Ethernet converter which which
>then connects to the HP switches.

 

>Now that I have STP disabled and got rid of the redundant link, I see no
>errors on the HP port's, no wireless EQ errors,  and nothing on the logs
>indication an issue. My question is does anyone have any idea what could of
>happened.

 

 

>Here is a snippet from one of the HP logs:

 

>I 01/01/90 01:02:57 ports: port 8 is Blocked by LACP

>I 01/01/90 01:02:58 ports: port 8 is now off-line

>I 01/01/90 01:03:05 ports: port 8 is Blocked by LACP

>I 01/01/90 01:03:05 ports: port 8 is Blocked by STP

>I 01/01/90 01:03:06 ports: port 8 is now on-line

>I 01/01/90 01:03:06 ports: port 7 is Blocked by STP

>I 01/01/90 01:03:06 ports: port 7 is now on-line

>I 01/01/90 01:03:08 ports: port 8 is now off-line

>I 01/01/90 01:03:10 ports: port 8 is Blocked by LACP

>I 01/01/90 01:03:13 ports: port 8 is Blocked by STP

>I 01/01/90 01:03:15 ports: port 8 is now on-line

>I 01/01/90 01:03:15 ports: port 7 is Blocked by STP

>I 01/01/90 01:03:15 ports: port 7 is now on-line

 

>THANKS!

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Jens S Andersen                 Email:  jsa at adm.aau.dk
Aalborg University              Telf:   9940 9464
Selma Lagerlöfs Vej 300, 4.2.59 Fax:    9940 7593
9220 Aalborg
Denmark