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<DIV><FONT face=Courier><FONT face=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).</FONT></FONT></DIV>
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<DIV><FONT face=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</FONT></DIV>
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<DIV><FONT
size=2>--------------------------------------------------------------------------------<BR>Lelio
Fulgenzi, B.A.<BR>Network Analyst (CCS) * University of Guelph * Guelph, Ontario
N1G 2W1<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</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=bfeeny@mac.com href="mailto:bfeeny@mac.com">Brian Feeny</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=cisco-voip@puck.nether.net
href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, August 27, 2005 1:34
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [cisco-voip] "switchport"
command behavior on 3500XL</DIV>
<DIV><BR></DIV><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><BR></BLOCKQUOTE></BODY></HTML>