Just FYI, I believe the phrase is "penultimate popping", which means the
last one pops the tag.
Scott
-----Original Message-----
From: Eric Osborne [mailto:eosborne@cisco.com]
Sent: Friday, November 30, 2001 1:49 PM
To: Giles Heron
Cc: Eduardo Pannunzio; cisco-nsp@puck.nether.net
Subject: Re: [nsp] A newbie question about MPLS
On Fri, Nov 30, 2001 at 06:35:34PM +0000, Giles Heron wrote:
> Eduardo Pannunzio wrote:
> >
> > Hi all,
> >
> > I'm trying to make a MPLS lab experience with 2 routers PEs (7513)and 4
CEs (2514) but I believe is not possible to simulate a MPLS-VPN behavior
without others routers like P (providers)between the PEs because a
Penultime-Hop-popping . Am I correct?
>
> no - it is perfectly possible to have an MPLS VPN with no P devices
> (i.e. the PE routers are adjacent.)
>
Agreed.
> > Which is the IOS command that could change the rule (if exist)?
>
> I'm not sure you can control this in IOS?
>
You can make RSVP or LDP hand out explicit null rather than implicit,
but there's functionally no difference.
eric
> but in any case it doesn't really matter. MPLS VPN will still work, but
> the routers will never actually impose a tunnel label.
>
> Giles
>
> > Thanks in advanced
> > Eduardo Pannunzio
> > --
> >
> > Eduardo Pannunzio
> > CCNA R&S / WS
> >
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> --
> =================================================================
> Giles Heron Principal Network Architect PacketExchange Ltd.
> ph: +44 7880 506185 "if you build it they will yawn"
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