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Spanning tree on procurve

Roberto33
Occasional Advisor

Spanning tree on procurve

Hi,
I'm knew on this kind of configuration, my net has at the moment three 5304xl switches and one 2512 procurve. I have one 5304 main1 as router and 5 vlan's, each switches uses one vlan for host's. All vlan's go to the main 1 (ip routing enable and static table route) where they have an ip used as gateway for each vlan. All my switches are connetted by fiber cable and I have no way to make any other connection for redundancy (see attachment), now my question is: do I have to disable spanning tree? on my log I have ports blocked by stp.

I 01/16/09 07:48:16 ports: port C8 is now off-line
I 01/16/09 07:48:18 ports: port C8 is Blocked by STP
I 01/16/09 07:48:21 ports: port C8 is now on-line
I 01/16/09 07:48:49 ports: port C7 is Blocked by STP
I 01/16/09 07:48:51 ports: port C7 is now on-line
I 01/16/09 07:48:54 ports: port C7 is now off-line
I 01/16/09 07:48:56 ports: port C7 is Blocked by STP
I 01/16/09 07:48:59 ports: port C7 is now on-line
I 01/16/09 07:49:13 ports: port C7 is now off-line
I 01/16/09 07:49:15 ports: port C7 is Blocked by STP
I 01/16/09 07:49:18 ports: port C7 is now on-line
I 01/16/09 07:50:35 ports: port B5 is Blocked by STP
I 01/16/09 07:50:37 ports: port B5 is now on-line
I 01/16/09 07:50:40 ports: port B5 is now off-line
I 01/16/09 07:50:42 ports: port B5 is Blocked by STP
I 01/16/09 07:50:44 ports: port B5 is now on-line
I 01/16/09 07:50:57 ports: port A1 is Blocked by LACP
I 01/16/09 07:50:59 ports: port A1 is Blocked by STP

Any good advise for me?

Thanks in advance Roberto.
2 REPLIES
Matt Hobbs
Honored Contributor

Re: Spanning tree on procurve

It's probably a good idea to leave spanning-tree enabled to protect against accidental loops.

Ignore the event log messages, that's expected behaviour when a port comes online, should not cause your users any issues.
KSimpson
Frequent Advisor

Re: Spanning tree on procurve

Like it was previuosly said, it's good to keep spanning-tree enabled. It will protect againsts those types of loops. Those logs are normal. Every port is blocked for a few seconds before they come online. It's like spanning tree is checking to prevent the loop. This is how spanning tree operates. If you see a port blocked for more a few seconds (like minutes), then you may have a loop. If you ever want to know if a port is blocked by spanning tree, execute the command

show spanning-tree

It will show you what ports are in what states.

Forward is normal
Blocked is Blocked
Disabled is nothing

I hope I didnt confuse anyone.