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<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'>It really, really depends on what version of IOS the
switch runs—the recommended configuration has changed a lot over the
years. <o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'>The field notice below lists (at the very bottom) the latest
(that I know of—it is from November 2004) recommended configuration—it
is for 3500XLs running IOS version 12.0(5)WC and later:<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'><a
href="http://www.psionic.com/en/US/products/hw/phones/ps379/products_field_notice09186a008031575e.shtml">http://www.psionic.com/en/US/products/hw/phones/ps379/products_field_notice09186a008031575e.shtml</a><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=navy face=Arial><span
style='font-size:9.0pt;color:navy'><o:p> </o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=navy face=Arial><span
style='font-size:9.0pt;color:navy'>By way of comparison, the following book
excerpt lists the recommended configuration from around July 2003 (it also gives
a brief overview of hardware capabilities of the switches):<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'><a
href="http://www.ciscopress.com/articles/article.asp?p=98122&seqNum=3&rl=1">http://www.ciscopress.com/articles/article.asp?p=98122&seqNum=3&rl=1</a><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'><o:p> </o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'>Hope this helps!<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'>Nikola Stojsin<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'><o:p> </o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'><o:p> </o:p></span></font></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>----------------------------------------------------------------------------</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Nikola Stojsin</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>PhD CCIE#12888</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><a href="mailto:nikola@att.net"
title="mailto:nikola@att.net">nikola@att.net</a><o:p></o:p></span></font></p>
<p class=MsoNormal><b><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-weight:bold'>-----------------------------------------------------------------<o:p></o:p></span></font></b></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'><o:p> </o:p></span></font></span></p>
<p class=MsoNormal><span class=content1><font size=1 color=black face=Arial><span
style='font-size:9.0pt'><o:p> </o:p></span></font></span></p>
<p class=MsoNormal><font size=2 color=navy face="Times New Roman"><span
style='font-size:10.0pt;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Lelio Fulgenzi<br>
<b><span style='font-weight:bold'>Sent:</span></b> Saturday, August 27, 2005
11:37 AM<br>
<b><span style='font-weight:bold'>To:</span></b> cisco-voip@puck.nether.net<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [cisco-voip]
"switchport" command behavior on 3500XL</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>here's what we have. it's done us well. we had (and are
still working out I believe) some issues with QoS on these older switches. some
of the guys on the team investigated and determined the allowed vlans should be
modified for a more efficient/secure delivery. vlan 129 and 131 are our mgmt
networks, that's why there were deleted. i'm sure we could have gone further
and only allowed 1 (default, can't remove) the voice and data vlans and
(1000-1005, can't remove these either i think).</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=Courier><span style='font-size:12.0pt;
font-family:Courier'> <o:p></o:p></span></font></p>
</div>
<div>
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face=Courier><span style='font-size:12.0pt;font-family:Courier'>
<hr size=2 width="100%" align=center>
</span></font></div>
</div>
<div>
<p class=MsoNormal><font size=3 face=Courier><span style='font-size:12.0pt;
font-family:Courier'>interface FastEthernet0/3<br>
switchport trunk encapsulation dot1q<br>
switchport trunk native vlan 226<br>
switchport trunk allowed vlan 1-128,130,132-1005<br>
switchport mode trunk<br>
switchport voice vlan 938<br>
switchport priority extend cos 0<br>
spanning-tree portfast</span></font><o:p></o:p></p>
</div>
<div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
</span></font></div>
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<div>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>--------------------------------------------------------------------------------<br>
Lelio Fulgenzi, B.A.<br>
Network Analyst (CCS) * <st1:PlaceType w:st="on">University</st1:PlaceType> of <st1:PlaceName
w:st="on">Guelph</st1:PlaceName> * <st1:place w:st="on"><st1:City w:st="on">Guelph</st1:City>,
<st1:State w:st="on">Ontario</st1:State> <st1:PostalCode w:st="on">N1G 2W1</st1:PostalCode></st1:place><br>
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)<br>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ <br>
"I had a coffee and Coke at lunch today...and now, I've got more jitter
than an<br>
IP phone on a long haul 10base2
connection"
LFJ</span></font><o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- <o:p></o:p></span></font></p>
</div>
<div style='font-color:black'>
<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:bfeeny@mac.com" title="bfeeny@mac.com">Brian Feeny</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:cisco-voip@puck.nether.net" title="cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>
<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Saturday, August
27, 2005 1:34 AM<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> [cisco-voip]
"switchport" command behavior on 3500XL<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
I have a question regarding the behavior of some "switchport" <br>
commands on the 3500XL vs. other cisco switches.<br>
<br>
On a 4000 (IOS) you can do:<br>
<br>
switchport trunk encapsulation dot1q<br>
switchport access vlan 100<br>
switchport voice vlan 200<br>
<br>
And that will allow you to:<br>
<br>
connect a regular device, and it will use vlan 100<br>
connect a cisco phone and it will trunk, placing the phone into vlan <br>
200, and device connected thru the phone into vlan 100<br>
<br>
But on a 3500XL, which supports those same commands, it apparently <br>
does not behave that way. You have to do:<br>
<br>
switchport trunk encapsulation dot1q<br>
switchport mode trunk<br>
switchport access vlan 100<br>
switchport voice vlan 200<br>
<br>
which then allows the phone to work as you would expect, but a PC <br>
connected directly to the switch will not work so you have<br>
to add the native vlan:<br>
<br>
switchport trunk encapsulation dot1q<br>
switchport trunk native vlan 100<br>
switchport mode trunk<br>
switchport access vlan 100<br>
switchport voice vlan 200<br>
<br>
which once you have done that, doesn't even make sense to have <br>
"switchport access vlan 100", so end up with:<br>
<br>
switchport trunk encapsulation dot1q<br>
switchport trunk native vlan 100<br>
switchport mode trunk<br>
switchport voice vlan 200<br>
<br>
I am just trying to nail down what config I should use to allow the <br>
port to be used directly by a device such as a PC, and also allow it <br>
to trunk to a cisco phone that would carry voice/data vlans. It <br>
seems these commands change alot as IOS gets updated. What is the <br>
correct configuration to do what I am wanting on the 3500XL?<br>
<br>
Brian<br>
<br>
_______________________________________________<br>
cisco-voip mailing list<br>
<a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br>
<a href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</a><o:p></o:p></span></font></p>
</blockquote>
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