From: Anthony Sequeira (asequeira@internetworkexpert.com)
Date: Mon Mar 23 2009 - 02:33:11 ART
I have not yet looked at the task in question here, but just from a
strategy perspective...if you have a Transparent device in the switch
topology, and you have to add a VLAN for a task, why not just pop that
VLAN in the Transparent device just in case it is needed there. This
"over configuration" seems like it could not hurt, only potentially
help.
Anthony J. Sequeira, CCIE #15626, CCSI #23251
Senior CCIE Instructor
asequeira@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Outside US: 775-826-4344
On Mar 22, 2009, at 11:47 AM, Salah ElShekeil wrote:
> yeah correct the best practice it to draw out you physical diagram
> then you
> will know where to put you vlans
>
>
>
>
> On Sun, Mar 22, 2009 at 6:33 PM, Network places
> <uniquemoonlight@gmail.com>wrote:
>
>> Well this is wat i got when i asked the same on the IE forums word of
>> wisdom
>>
>> "You would need to draw out your switches and trunk links first.
>> Then you
>> need to write down the vlans used on the ports on each switch.
>> Since all
>> switches are in transparent mode, each switch can be configured
>> with only
>> the vlans needed.
>>
>> If all ports in a vlan (including any SVIs) are on the same switch,
>> that
>> vlan does not need to be configured on any other switch.
>>
>> If all ports in a vlan (including any SVIs) are on adjacent
>> switches with a
>> forwarding trunk link between them, the vlan only needs to be
>> configured on
>> those switches.
>>
>> If a vlan has ports (including any SVIs) on two or more switches,
>> and the
>> trunk link needs to transit a switch with no ports in the vlan, the
>> transit
>> switch, as well as the switches with ports in the vlan will need to
>> have the
>> vlan configured."
>>
>> Hope it helps.
>>
>> Thanks
>>
>>
>> On Sat, Mar 21, 2009 at 5:30 PM, Salah ElShekeil <
>> salah.elshekeil@gmail.com> wrote:
>>
>>> simply SW1 is the transite path so there should be a spannig tree
>>> instanse
>>> for this vlan along the path.
>>>
>>> try to remove vlan 43 form SW1 the try to ping from R4 to BB3, you
>>> won't
>>> be
>>> able,
>>>
>>> why? because SW1 is in the middle between SW2, SW3 so there should
>>> be a
>>> spanning tree instant for this vlan,
>>>
>>> in the transit path,
>>>
>>> HTH
>>>
>>> Salah
>>>
>>> On Sat, Mar 21, 2009 at 3:21 PM, itsfortarget iwillgetit <
>>> itsfortarget@gmail.com> wrote:
>>>
>>>> Dear Experts,
>>>> In IE expert volume 1 version 5, task 1.9 ( bridging and
>>>> switching ),
>>> can
>>>> any body tell why the vlan 43 is created in SW1.Tasks asks to
>>>> make SW1
>>> in
>>>> VTP transparent mode, but vlan 43 is not required in SW1 , it
>>>> only exist
>>> in
>>>> SW2 and Sw3. For VTP to propagate vlan info from server to
>>>> client , if
>>>> a transparent mode switch exist between server and client as
>>>> transit
>>> .Is
>>>> transparent switch should have the vlan exist ??
>>>>
>>>>
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>>>>
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>>>
>>>
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>
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>
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