From: Ed Lui (edwlui@gmail.com)
Date: Wed Oct 12 2005 - 13:39:02 GMT-3
Larry,
What if I set up HSRP and sub interfaces on both routers without defining
native and vlan 1 shutdown ? In my router on a stick scenario, it worked.
Any idea ?
R1(vlan3,8)===========|vlan3,8(dot1q trunk w/o native)
|---------------3550EMI---------------
R2(vlan3,8)===========|vlan3,8(dot1q trunk w/o native)
Thanks,
Ed Lui
On 10/12/05, Larry Letterman (lletterm) <lletterm@cisco.com> wrote:
>
> Ed,
>
> Set up two routers with dot1q sub-interfaces...connect the FaEthernets
> to a 3550/3750,
> Set the trunk ports for that switch so that the data vlan is the native
> vlan. Setup the hsrp
> On the routers, and you'll see that the native vlan being set
> incorrectly will alter the
> Opeartion of things..you can always leave it to the default of vlan 1..
>
>
>
> Larry Letterman
> INS-NW-WEST
> Cisco Systems
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Ed Lui
> Sent: Wednesday, October 12, 2005 11:03 AM
> To: ccielab@groupstudy.com
> Subject: DOT1Q NATIVE VLAN STANDARD or NON-STANDARD
>
> Hi group,
> I have no luck finding out why we need native vlan in dot1q. I
> understand that native vlan should be defined on a trunk port. I came
> across a router on a stick lab scenario, which I did not define the
> native vlan and it is still working fine. Read through the dot1q
> standard on ieee.org <http://ieee.org/><http://ieee.org>but still can not
> figure out my
> question.
> So, what is the difference between having a native and not having a
> native vlan defined ? The only thing I can think of is, tagged frame can
> carry QoS information. Other than that, what is the benefit or
> difference between tagged and untagged frames ? Why define a native ?
>
> Thanks in advance for any help or hint,
>
> Ed Lui
>
>
> TRUNK W/O NATIVE VLAN
> 2621=============================3550
>
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