From: Luca Hall (lhall@setnine.com)
Date: Sat Apr 19 2008 - 11:03:13 ART
I'm pretty sure I tried this and it wasn't the case, I think I was using
3750's - so maybe this only applies to the Cat5000's. I'll try again later
today and let you know what I find.
> FTR:
>
> Version-Dependent Transparent Mode--In VTP version 1, a VTP
> transparent switch inspects VTP messages for the domain name and
> version, and forwards a message only if the version and domain name
> match. Since only one domain is supported in the Catalyst 5000 series
> software, VTP version 2 forwards VTP messages in transparent mode,
> without checking the version.
>
> So if the TRANSPARENT switch is in version 1, it only forwards same
> domain version 1 vtp messages, but if it is in version 2, it forwards
> vtp messages of any domain/version.
>
> -Carlos
>
> Luca Hall @ 04/04/2008 20:47 -0300 dixit:
>> yep meant vtp info.
>>
>> if you change the vtp domain of the transparent switch that the vtp info
>> is crossing to a different domain from what it is sent from it wont be
>> forwarded anymore is what I should have said...
>>
>>> Why would it stop forwarding the vlans ?
>>> May be you meant "forwarding VTP info about vlans" ?
>>> -Carlos
>>>
>>> Luca Hall @ 04/04/2008 20:05 -0300 dixit:
>>>> If they all know the same vlans and you change to whatever vtp mode it
>>>> wont change the vlans and they will be forwarded, if you change the
>>>> vtp
>>>> domain
>>>> on the transparent switches they will stop forwarding the vlans.
>>>>
>>>>
>>>>
>>>>> So basically is it safe to assume that regardless of the VTP version
>>>>> on
>>>>> the 4 switches I can change a single switch or rather 3 of the from
>>>>> client/server to transparent thus leaving one as server and it won't
>>>>> mess up my VLAN settings?
>>>>>
>>>>> Thanks
>>>>> -----Original Message-----
>>>>> From: Gary Braver [mailto:gbraver@fastlanenetworks.com]
>>>>> Sent: Friday, April 04, 2008 2:51 PM
>>>>> To: 'Carlos G Mendioroz'; Athaide, Dwayne
>>>>> Cc: 'groupstudy'
>>>>> Subject: RE: VTP
>>>>>
>>>>> I painfully went through this.
>>>>>
>>>>> Your switch is in client mode. It has vlans automatically stored in
>>>>> the
>>>>> vlan.dat file (received from the server).
>>>>>
>>>>> You change the connection to vtp mode transparent.
>>>>>
>>>>> Transparent mode can have vlans defined in the config or through the
>>>>> vlan database. Since the vlan database exists the vlans will be
>>>>> loaded
>>>>> from the vlan.dat file
>>>>>
>>>>> You reboot and the vlan.dat file is still there. You can even do a
>>>>> write erase and the vlan.dat file will still be there.
>>>>>
>>>>> Wither later revisions of IOS You can delete the vlan.dat file and
>>>>> enter
>>>>> all vlan info in the config directly. Believe the vlan info will
>>>>> still
>>>>> be stored in the vlan.dat file but since all vlan config is in the
>>>>> main
>>>>> config you could take the config to a new identical switch / replace
>>>>> the
>>>>> switch without loosing all the vlan info.
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
>>>>> Of
>>>>> Carlos G Mendioroz
>>>>> Sent: Friday, April 04, 2008 1:07 PM
>>>>> To: Athaide, Dwayne
>>>>> Cc: groupstudy
>>>>> Subject: Re: VTP
>>>>>
>>>>> Dwayne,
>>>>> inline:
>>>>>
>>>>> Athaide, Dwayne @ 03/04/2008 10:57 -0300 dixit:
>>>>>> I had asked a similar question pertaining to a scenario but did not
>>>>> get
>>>>>> a response so I am going to generalize the question .
>>>>>>
>>>>>>
>>>>>>
>>>>>> I have 4 switches SW1 (S)-SW2(S)-SW3(T)-SW4(S). All switches are
>>>>>> trunked and belong in the same VTP domain.
>>>>>>
>>>>>>
>>>>>>
>>>>>> SW1, SW2, SW4 are Server
>>>>>>
>>>>>> SW3 is a Transparent switch.
>>>>>>
>>>>>>
>>>>>>
>>>>>> SW1(S)---Trunk-----SW2(S)----Trunk
>>>>>> ------SW3(T)-------Trunk----SW4(S)
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> Now say to start off all switches have VLAN's 1 thru 10. The
>>>>>> switches
>>>>>> are running VTP version 1. And VTP pruning is enabled.
>>>>>>
>>>>>>
>>>>>>
>>>>>> 1. Now say I build a new VLAN on SW1. Will that VLAN be
>>>>>> propagated to Switch SW4.?
>>>>>>
>>>>>>
>>>>>>
>>>>>> My Answer :When I lab this up it did get propagated and this
>>>>>> confused
>>>>> me
>>>>>> as I was under the impression that Version 1 VTP on a transparent
>>>>> switch
>>>>>> will not propagate the VLAN only VTP version 2 would.
>>>>> AFAIK, main difference between v1 & v2 is token ring support.
>>>>> Transparent should enable VTP to pass through, as it does according
>>>>> to
>>>>> your lab.
>>>>>
>>>>>> 2. Say I have a Router A connected to Access port VLAN 10 on
>>>>>> SW3
>>>>>> and a routed port on SW2 . Should Router A be able to ping Router
>>>>>> B
>>>>> &
>>>>>> vice versa thru the transparent switch?
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>> RA-(VLAN10)------SW3----------Trunk----------------SW4(Vlan10)----------
>>>>>> ----Routed port(SW2)
>>>>>>
>>>>>>
>>>>>>
>>>>>> I can although when I do a show int trunk on SW4 I show VLAN 10 to
>>>>>> be
>>>>>> pruned.
>>>>> Typo here ? You say "router port on SW2" and draw SW4.
>>>>> If it is in SW2, prunned at SW4 will have no effect.
>>>>> Also, prunning stops broadcast only, so if you ping from the prunned
>>>>> side, you will lift the bann, so to say .
>>>>>
>>>>> -Carlos
>>>>>
>>>>>>
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>>
>>>>> _______________________________________________________________________
>>>>>> Subscription information may be found at:
>>>>>> http://www.groupstudy.com/list/CCIELab.html
>>>>>>
>>>>> --
>>>>> Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
>>>>>
>>>>> _______________________________________________________________________
>>>>> Subscription information may be found at:
>>>>> http://www.groupstudy.com/list/CCIELab.html
>>>>>
>>>>> _______________________________________________________________________
>>>>> Subscription information may be found at:
>>>>> http://www.groupstudy.com/list/CCIELab.html
>>>> _______________________________________________________________________
>>>> Subscription information may be found at:
>>>> http://www.groupstudy.com/list/CCIELab.html
>>>>
>>> --
>>> Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>
> --
> Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
>
>
> Pass the CCIE in six weeks, Guaranteed!
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> _______________________________________________________________________
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