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<span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; FONT-WEIGHT:Normal;">Why is there no priority out command on this voice port. That could cause issues if you had a broadcast storm on the port from a loop on the network<br>
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<span style="font-size:10pt;font-family:Tahoma; font-weight:bold">From: </span><span style="font-size:10pt;font-family:Tahoma; font-weight:normal;">Todd Franklin <toddnh65@gmail.com></span><br>
<span style="font-size:10pt;font-family:Tahoma; font-weight:bold">Sent: </span><span style="font-size:10pt;font-family:Tahoma; font-weight:normal;">Saturday, September 20, 2008 3:48 PM</span><br>
<span style="font-size:10pt;font-family:Tahoma; font-weight:bold">To: </span><span style="font-size:10pt;font-family:Tahoma; font-weight:normal;">Mike Brooks <2xccie2b@gmail.com></span><br>
<span style="font-size:10pt;font-family:Tahoma; font-weight:bold">Cc: </span><span style="font-size:10pt;font-family:Tahoma; font-weight:normal;">cisco-voip@puck.nether.net <cisco-voip@puck.nether.net></span><br>
<span style="font-size:10pt;font-family:Tahoma; font-weight:bold">Subject: </span>
<span style="font-size:10pt;font-family:Tahoma; font-weight:normal;">Re: [cisco-voip] Switch Hanging off Phone</span><br>
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<div dir="ltr">Thanks Mike. The config of the switchport:<br>
<br>
interface FastEthernet0/4 <br>
switchport trunk encapsulation dot1q <br>
switchport mode dynamic desirable <br>
switchport voice vlan 6 <br>
srr-queue bandwidth share 10 10 60 20 <br>
srr-queue bandwidth shape 10 0 0 0 <br>
mls qos trust device cisco-phone <br>
mls qos trust cos <br>
auto qos voip cisco-phone <br>
spanning-tree portfast<br>
<br>
It really screwed around with the phones. The data stayed ok. <br>
<br>
He came off from the switchport, into the 7940. From there into the Linksys (which has a built in 4 port switch) and one of those ports he had plugged into his PC.<br>
<br>
What do you think?<br>
<br>
Todd<br>
<br>
<div class="gmail_quote">On Sat, Sep 20, 2008 at 3:38 PM, Mike Brooks <span dir="ltr">
<<a href="mailto:2xccie2b@gmail.com">2xccie2b@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
What was the configuration of the switchport ? Also was the data vlan<br>
affected at all or just devices on the voice vlan ? A common issue we<br>
have seen with hubs plugged in is them getting mis-cabled by the<br>
enduser and getting looped up causing major issues on the network. I<br>
do not believe the linksys devices send BPDUs. If it was a cabling<br>
issue on the linksys ..then enabling bpduguard on the port will<br>
errdisable the port..because the port will receive its own bpdu if the<br>
linksys is miscabled.<br>
<br>
Also, the linksys could have been acting as a rouge dhcp server. Not<br>
knowing how your network is set up or the symptoms you were<br>
experiencing it would be hard to tell.<br>
<br>
Just a few guesses ;-)<br>
<br>
hth,<br>
<br>
Mike Brooks<br>
CCIE# 16027 (R&S)<br>
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<div class="Wj3C7c"><br>
On Sat, Sep 20, 2008 at 3:10 PM, Todd Franklin <<a href="mailto:toddnh65@gmail.com">toddnh65@gmail.com</a>> wrote:<br>
> Phone system went "kerflunk" yesterday. Found a 7940 with a Linksysy<br>
> wireless router plugged into the PC port of the phone. Could that have done<br>
> it? I seem to remember one VAR telling me this was a grand way to take an<br>
> IPT network down.<br>
><br>
> Also, is there any configuration I can add to the 3560s that would<br>
> "disallow" this configuration?<br>
><br>
> Thank you!<br>
><br>
> Todd<br>
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><br>
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