[cisco-voip] cisco IP Phone causes stp loop.

[Ahmed Elnagar]

Just a note

I Hate 500 Express it is a very bad switch and it has a lot of strange
configuration setting plus no useful troubleshooting capabilities at
all.

 

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jefflin Choi
Sent: Tuesday, July 03, 2007 9:56 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] cisco IP Phone causes stp loop.

 

Hi all,

 

Some end user plugged the pc port and switch port of an IP Phone to a
Catalyst CE500 port at the same time causing our client's switch on a
loop.

 

CE500--------7912 IP Phone

  |                        |

  |------------------------|

 

We can't prevent end user making accidental mistakes like this which
might cause network failure. 

 

I was wondering if Cisco IP phones are sending BPDU so that the CE500
will errdisable the port. Doesn't it?

 

Any way to prevent the this from happening? 

 

Thanks,

Jeff

 

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