From: Luca Hall (lhall@setnine.com)
Date: Fri Apr 04 2008 - 20:05:12 ART
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
>>
>>
> _______________________________________________________________________
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>>
>
> --
> Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
>
> _______________________________________________________________________
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> http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
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