From: paul cosgrove (paul.cosgrove@gmail.com)
Date: Sat Jul 12 2008 - 17:12:53 ART
See also:
http://www.groupstudy.com/archives/ccielab/200806/msg00022.html
(but I think this is really overkill for the lab)
Regards,
Paul.
On Sat, Jul 12, 2008 at 9:05 PM, paul cosgrove <paul.cosgrove@gmail.com>
wrote:
>
> MAC acls can be used to stop VTP being received, they cannot be used to
> stop advertisements being sent; vtp transparent mode will do that for
> you. In later versions of IOS there is also a "vtp mode off" command.
>
> The (ether)type values can be used to differentiate the protocols. You
> cannot match the PID, only the (ether) type part of it.
>
> You can find a discussion about this including examples of MAC ACLs here:-
> http://puck.nether.net/pipermail/cisco-nsp/2008-April/050185.html
>
> Paul.
>
> Jason Madsen wrote:
> > to be further specific you could block it by it's PID, which is 0x2003,
> > along with 01:00:0C:CC:CC:CC. CDP's is 0x2000 etc.
> >
> > Jason
> >
> > On Sat, Jul 12, 2008 at 12:32 PM, Jason Madsen <madsen.jason@gmail.com>
> > wrote:
> >
> >
> >> hmmmm, that's a good one. of course vtp mode transparent may prevent
> the
> >> device from participating in vtp (especially VTP v1), but to actually
> block
> >> it is another thing. i believe you could use a MACL and block
> 01:00:0C:CC:CC:CC,
> >> but i also believe that CDP, UDLD, DTP, and PAGP also use this address
> so
> >> you might have to look at the implications of doing such a thing. you
> might
> >> want to use different VTP domain names to further prevent compatibility
> >> between the systems, although that could be considered overkill.
> >>
> >> just some thoughts,
> >> Jason
> >>
> >> On Sat, Jul 12, 2008 at 12:12 PM, akyccie <akyccie@gmail.com> wrote:
> >>
> >>
> >>> How to block VTP advertisement ???
> >>>
> >>>
> >>> _______________________________________________________________________
> >>> 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
This archive was generated by hypermail 2.1.4 : Mon Aug 04 2008 - 06:11:54 ART