From: Scott, Tyson C (tyson.scott@hp.com)
Date: Thu Feb 26 2004 - 10:40:16 GMT-3
By default Native VLAN 1 with 802.1q trunking is not tagged but you can
tag it issuing the command vlan dot1q tag native in global configuration
mode. But the question below his question is no you do not want to
prune vlan 1 because the question is stating make sure VLAN 1 is not
tagged which is asking you to use dot1q trunking. If you pruned it you
would not have an untagged VLAN running across the etherchannel so you
would be effectively not fulfilling the requirements of the question.
Regards,
Tyson Scott
Agilent Problem Management Team
Managed Network Services
Phone: 313-583-5812
Pager: 877-997-0811
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Yasser Aly
Sent: Thursday, February 26, 2004 6:50 AM
To: jmatus@pacbell.net; ccielab@groupstudy.com
Subject: RE: cat3550 vlan question: ipexpert manual
Hello,
dot1q encapsulation on a trunk will tag all the VLANs except the native
vlan.
By default native vlan is vlan 1.
If asked to make vlan 10 untagged in this scenario, it simply means to
change the native vlan using the following command: " switchport trunk
native vlan 10 "
If asked to tag all vlans - including the native vlan - then it means to
use
isl encapsulation method.
HTH,
Yasser
>From: jmatus@pacbell.net
>Reply-To: jmatus@pacbell.net
>Date: Thu, 26 Feb 2004 02:07:15 -0500
>
>hi there,
>there is a task that comes up repeatedly in this manual for the
>catalyst3550's. the task states:
>
>configure layer 2 etherchannel group on fa0/23 and 0/24 of both
switches.
>use ieee standard trunking rotocol and make sure ONLY VLAN 1 can carry
non
>tagged frames.
>
>i can confugre the etherchannel just fine and use dot1q for the
protocol,
>but i have no idea what "make sure ONLY vlan 1 can carry non tagged
>frames" means. the channel group is a trunk so i would think expect it
to
>carry tagged frames....so would this mean to remove/prune vlan 1 from
this
>trunk? or is it something different?
>
>thanks in advance for you help!
>john d. matus
>
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