Solved

Stopping Spanning Tree broadcasts from a 3560 switch.

Posted on 2007-11-28
6
861 Views
Last Modified: 2012-08-13
There is only 2 switches. Spanning tree is not configured.. but when monitoring traffic, i keep seeing these... and there are a ton of them..
79      34.081723      Cisco_1c:be:8c      Spanning-tree-(for-bridges)_00      STP      Conf. Root = 32772/00:1b:54:1c:be:80  Cost = 0  Port = 0x800c
80      36.086681      Cisco_1c:be:8c      Spanning-tree-(for-bridges)_00      STP      Conf. Root = 32772/00:1b:54:1c:be:80  Cost = 0  Port = 0x800c
95      53.814725      Cisco_1c:be:8c      Cisco_1c:be:8c      LOOP      Reply

How do i turn these off?
0
Comment
Question by:jaysonfranklin
  • 3
  • 2
6 Comments
 
LVL 21

Expert Comment

by:from_exp
ID: 20369449
on the particular interface type: spanning-tree bpdufilter enable
this command will disable broadcasting of bpdu packets from this interface and will filter out all incoming bpdu packets

example:
en
<password>
conf t
interface gi1/1
spanning-tree bpdufilter enable
end
0
 
LVL 1

Author Comment

by:jaysonfranklin
ID: 20369549
do I do that on all the physical interfaces or just the vlan interfaces?
0
 
LVL 1

Author Comment

by:jaysonfranklin
ID: 20369570
i just did int range 0-52

im still getting this one though..

389      20.083187      Cisco_1c:be:8c      Cisco_1c:be:8c      LOOP      Reply

what is this? im assuming i need to do that for all the int's on SW2  or just doing it on the main one should be good?
0
Control application downtime with dependency maps

Visualize the interdependencies between application components better with Applications Manager's automated application discovery and dependency mapping feature. Resolve performance issues faster by quickly isolating problematic components.

 
LVL 21

Accepted Solution

by:
from_exp earned 500 total points
ID: 20369577
on all active physical interfaces
use range command
conf t
interface range gi1/1 - 10
...
0
 
LVL 21

Expert Comment

by:from_exp
ID: 20369648
it looks like cisco loop detection protocol.
it should funtion
0
 
LVL 50

Expert Comment

by:Don Johnston
ID: 20369839
They appear to be BPDU's. Without seeing the complete frame it's hard to say for sure.

Spanning tree is enabled by default of all Cisco switches. I REALLY don't recommend turning it off. The BPDU's aren't consuming much bandwidth and they'll prevent a layer 2 loop if a redundant link is ever connected.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This article is a guide to configure bridging on Cisco Routers.  This is something I never knew was possible until after making a few phone calls to Cisco.  Using bridging saved our company money by not requiring us to purchase a new switch.  Bridgi…
Tired of waiting for your show or movie to load?  Are buffering issues a constant problem with your internet connection?  Check this article out to see if these simple adjustments are the solution for you.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now