From: ALL From_NJ (all.from.nj@gmail.com)
Date: Mon Feb 23 2009 - 16:25:35 ARST
I am not currently studying for the SP exam, and was surprised to see a
question about cell mode. For many platforms, all support of cell mode has
been taken out / discontinued and or being phased out ...
Some ISPs had used it, so yep, it was used in large production networks.
Cell mode is mentioned in the written still. I re-checked the lab
blueprint, and mentioned is label merging ... There are 7200s listed on the
equipment list ... so it should be avail.
I thought I saw this question in a past posting ... if anyone has that
thread, that would be helpful too.
I also googled this topic and found this from Internetwork Expert (watch
the word wrap):
http://blog.internetworkexpert.com/2008/07/10/cell-mode-mpls/
HTH,
Andrew Lee Lissitz
On Mon, Feb 23, 2009 at 12:43 PM, Alex H. Ryu <r.hyunseog@ieee.org> wrote:
> Do we have Cell-mode MPLS in production in any where?
> I saw cell-mode MPLS was supported from Cisco BPX/MGX.
> But if you plan to use it with router platform, you have to use
> frame-mode MPLS.
>
> So I thought cell-mode MPLS was not advanced to production at all.
>
> The reason of deploying MPLS is to get rid of ATM or other underlying
> mechanism.
>
>
> Alex
>
>
> ALL From_NJ wrote:
> > Yep, that is my understanding too.
> >
> > BTW - I can not find the reference, but for the lab portion, I thought it
> > was only frame mode. No more cell mode I thought ...
> >
> > I checked the lab blueprint, but ... am not finding references to the
> > modes.
> >
> >
> >
> > On Mon, Feb 23, 2009 at 11:09 AM, swm@emanon.com <swm@emanon.com> wrote:
> >
> >
> >> Cell mode MPLS is a heavier burden on interfacing with the ATM network
> in
> >> order to use it's built-in features and intracacies. Your ATM switch
> will
> >> need to be configured and capable for this to work.
> >>
> >> With Frame Mode, you are essentially "not caring" about the underlying
> >> technology (be it frame, sonet, atm, ethernet, ppp, whatever) as long as
> >> you
> >> have reachability and communications already established.
> >>
> >> HTH,
> >>
> >> Scott
> >>
> >>
> >> ---- Message from Service Provider <service.providersa@gmail.com> at
> >> 2009-02-23 17:39:14 ------
> >>
> >>> Hi guys
> >>>
> >>> I was just doing a lab and realised that when configuring MPLS
> cell-mode,
> >>>
> >> no
> >>
> >>> IGP is necessary or required to establish the LDP neighborship like in
> >>> frame-mode MPLS. What causes this between cell-mode vs frame-mode?
> >>>
> >>>
> >>> Blogs and organic groups at http://www.ccie.net
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> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
>
>
-- Andrew Lee Lissitz all.from.nj@gmail.comBlogs and organic groups at http://www.ccie.net
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