Re: Cisco 3560 - behavior

From: Steve Di Bias <sdibias_at_gmail.com>
Date: Mon, 11 Apr 2011 12:15:27 -0700

Proof by ios, I will lab it up and report my findings
On Apr 11, 2011 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
>>> >>>
>>> >>>
Received on Mon Apr 11 2011 - 12:15:27 ART

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