From: Joseph Saad (joseph.samir.saad@gmail.com)
Date: Sat Apr 19 2008 - 11:40:18 ART
look archives up. The documented behavior for VTP v2 works only with 3725
esw-16 module but not 35x0.
Cisco claims it's a documentation bug in 35x0 config guides. Bug is
documented in the bug database.
Joseph
#20243
On Sat, Apr 19, 2008 at 6:21 PM, Carlos Trujillo <
carlos.trujillo.jimenez@gmail.com> wrote:
> Carlos.
>
> Im trying the same config you mention, but it doesnt work for me, any
> suggestion whats going on?
>
>
> [SW1]---------[SW2]---------[SW3]-------[SW4]
>
> SW1, SW2, SW4 belong to the vtp domain INTERNETWORKEXPERT.
> SW3 belong to the vtp domain NETMASTERCLASS, and its in transparent mode.
>
> I enable VTP version 2 in SW3, and then I create some vlans in SW1, but
> those vlans are not propagated to SW4. they are only propagated to SW2. As
> SW3 is in another vtp domain, It is not propagating the vlans from another
> vtp domain, While It is in version 2 enabled, and in transparent mode.
> Do your comments apply also to Catalyst 3550 and 3560 switches?
>
> A solution I Think, that comes my maind to solve to vlan propagation from
> sw1 and sw2 to sw4 is to make a dot1q tunnel, in sw3 trunk interfaces,
> encapsulating also vtp messages. I tested It and I can succesfully get
> vlans
> propagated from sw2 to sw4 crossing sw3.
>
> Now when I do this solution, SW3 trunk interfaces becomes vlan access
> ports
> of the dot1q tunnel, where sw3 is loosing its trunk connections.
>
>
>
>
>
>
> 2008/4/19, Carlos G Mendioroz <tron@huapi.ba.ar>:
> >
> > 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!
> > http://www.certscience.com/CCIE
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
>
> Pass the CCIE in six weeks, Guaranteed!
> http://www.certscience.com/CCIE
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Pass the CCIE in six weeks, Guaranteed!
http://www.certscience.com/CCIE
This archive was generated by hypermail 2.1.4 : Thu May 01 2008 - 08:25:51 ART