Re: Cisco 3560 - behavior

Totally agreed, you can actually test it by labbing it up. All you need is a
router and a switch.
Configure the router with:

Int F0/0
No shut
Int F0/0.1
Encap dot 100
ip addr 1.1.1.1 /24

Configure the switch with:
Int F0/1 ------ Let's say this is the port that he router is connected to
swi mode acc
swi acc v 100
no shut

Once you test it, you will never forget it.
To send untagged frames, just add the "Native" keyword.

On Mon, Apr 11, 2011 at 12:13 PM, Muzammil Malick <malickmuz_at_gmail.com>wrote:

> So are you saying that an access port today will accept tagged traffic
> as long as it is tagged with the vlan assigned to the access port?
>
> This is contradictory to the documentation and everything else I have read.
>
> I had always understood that any tagged traffic will be dropped regardless?
>
> On 11 April 2011 20:04, Steve Di Bias <sdibias_at_gmail.com> wrote:
> > Of course, nobody knows everything, so fair enough.
> >
> >
> >
> > The behavior today would be to forward any untagged frames or frames
> tagged
> > with a vlan id of the access vlan while denying everything else.
> >
> >
> >
> > This wasn't always the case however, and I believe that older OS versions
> > will actually forward the tagged frames as well.
> >
> >
> >
> >
> >
> > On Mon, Apr 11, 2011 at 11:39 AM, Stephen Robinson <
> > stephen.robinson_at_qtzl.com> wrote:
> >
> >> Sounds like none of you know the answer either... HaHAHa....
> >>
> >> Better to make fun than be productive... :)
> >>
> >>
> >>
> >> Jagdeesh - sorry for the ridicule of my peers. I speculate (but do
> not
> >> know) that you could not pass a vlan tag on an access port but I'm not
> >> sure
> >> if it would drop or if it would just strip the tag.
> >>
> >> Steve-Max-JP care to step up and try to answer?
> >>
> >>
> >> BTW - a ccie number does not mean you know everything.... And who
> better
> >> to ask than other smart people like this list. even Narbik and Scott
> >> don't know everything (I mean... in theory there may be something that
> >> they don't know... Of course I can't prove it)
> >>
> >>
> >>
> >>
> >>
> >> > From: JB Poplawski <jb.poplawski_at_gmail.com>
> >> > Reply-To: JB Poplawski <jb.poplawski_at_gmail.com>
> >> > Date: Mon, 11 Apr 2011 13:09:07 -0500
> >> > To: Max Pierson <nmaxpierson_at_gmail.com>
> >> > Cc: Steve Di Bias <sdibias_at_gmail.com>, "Engr. Jagdeesh. K. Vasvani"
> >> > <jk_vasvani_at_hotmail.com>, group-study <ccielab_at_groupstudy.com>
> >> > Subject: Re: Cisco 3560 - behavior
> >> >
> >> > I just re-read that... yikes!
> >> > JB
> >> >
> >> > On Mon, Apr 11, 2011 at 12:43 PM, Max Pierson <nmaxpierson_at_gmail.com>
> >> wrote:
> >> >>> Does your signature say CCIE?
> >> >>
> >> >> Lol, i was thinking the same thing. It must be from a pass4sure cert
> >> :)
> >> >>
> >> >> On Mon, Apr 11, 2011 at 12:18 PM, Steve Di Bias <sdibias_at_gmail.com>
> >> wrote:
> >> >>
> >> >>> Does your signature say CCIE?
> >> >>> On Apr 11, 2011 9:59 AM, "Engr. Jagdeesh. K. Vasvani" <
> >> >>> jk_vasvani_at_hotmail.com> wrote:
> >> >>>> Dear Experts,
> >> >>>> Would appreciate if anyone could help by clarifying below queries:
> >> >>>>
> >> >>>>
> >> >>>> 1. how would a cisco switch reacts when it receives a tagged Frame
> on
> >> an
> >> >>>> Access Port.
> >> >>>> 2. Does switch pass each & every frame b/w access ports in vlan x,
> >> where
> >> >>> one
> >> >>>> is configured with " switchport voice vlan x" and other with
> >> "switchport
> >> >>>> access vlan x"
> >> >>>>
> >> >>>>
> >> >>>> REgards,
> >> >>>>
> >> >>>>
> >> >>>>
> >> >>>> Jagdeesh. K. Vasvani
> >> >>>> CCIE# 28213 (R&S)
> >> >>>>
> >> >>>>
> >> >>>> Blogs and organic groups at http://www.ccie.net
> >> >>>>
> >> >>>>
> >> _______________________________________________________________________
> >> >>>> Subscription information may be found at:
> >> >>>> http://www.groupstudy.com/list/CCIELab.html
> >> >>>
> >> >>>
> >> >>> Blogs and organic groups at http://www.ccie.net
> >> >>>
> >> >>>
> _______________________________________________________________________
> >> >>> Subscription information may be found at:
> >> >>> http://www.groupstudy.com/list/CCIELab.html
> >> >>
> >> >>
> >> >> Blogs and organic groups at http://www.ccie.net
> >> >>
> >> >>
> _______________________________________________________________________
> >> >> Subscription information may be found at:
> >> >> http://www.groupstudy.com/list/CCIELab.html
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
> _______________________________________________________________________
> >> > Subscription information may be found at:
> >> > http://www.groupstudy.com/list/CCIELab.html
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >>
> >>
> >>
> >
> >
> > --
> > -Steve Di Bias
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
*Narbik Kocharians
*CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining.com <http://www.micronicstraining.com/>
Sr. Technical Instructor
*Ask about our FREE Lab Voucher with our Boot Camps*
YES! We take Cisco Learning Credits!
Training & Remote Racks available
Blogs and organic groups at http://www.ccie.net