The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Fwd: R: R: Minimum Network Configuration to setup MPLS
Federico, I would have to crank up the lab to make sure, bit I think you will still find the LDP forwarding table. You are absolutely right in saying that a good view of a complete MPLS network would include a P router, as then you will see the penultimate hop label popping. If the tester is looking at VPN traffic, then all the BGP information and VRF information will be a lot more interesting than just a couple of labels, and that can be seen on just the two PEs. If you want to look at TE tunnels - well, more of a network would certainly be nice - in fact, necessary. I was just saying that as a minimum, you can use 2 PEs alone to see the MPLS function. I am not saying that is the best, but it does work, it is functional. Roger Williams >Resent-Date: Fri, 25 Oct 2002 10:46:47 -0400 >X-Authentication-Warning: host.secure4-hosting.net: mplsrc12 set sender to >mpls-ops-request@mplsrc.com using -f >From: Aita Federico /Consulente <Federico.Aita@albacom.it> >To: "'mpls-ops@mplsrc.com'" <mpls-ops@mplsrc.com> >Subject: R: R: [MPLS-OPS]: Minimum Network Configuration to setup MPLS >Date: Fri, 25 Oct 2002 16:24:41 +0200 >X-Mailer: Internet Mail Service (5.5.2655.55) >Resent-From: mpls-ops@mplsrc.com >X-Mailing-List: <mpls-ops@mplsrc.com> archive/latest/4709 >X-Loop: mpls-ops@mplsrc.com >Resent-Sender: mpls-ops-request@mplsrc.com > >I'm in agree with you, but i think that even if an MPLS with 2 PEs only will >work, it's not a good lab to understand MPLS. >I've read (in "somebody"'s book :-)) that MPLS does that: (without VPN's or >anything else) > > >packet from CE to PE >PE push the label and switch the packet >P switch the packet >last P remove the label (penultimate hop popping) and pass the IP packet to >PE >PE route the packet to CE > >Without a P, i think that PE will push the label and then pop off the label >as penultimate hop, than it pass the IP packet >to the other PE and so on... > >(no LDP/TDP forwarding table will be made...) > >Is it wrong? > >Bye > >Federico Aita >Network Specialist Dati >Cisco Certified Network & Design Associate >Albacom > > >-----Messaggio originale----- >Da: Roger Clark Williams [mailto:rogerw@nordlink.com] >Inviato: venerd́ 25 ottobre 2002 14.27 >A: MPLS-ops Mailing List >Oggetto: Fwd: R: [MPLS-OPS]: Minimum Network Configuration to setup MPLS > > > Federico, with all respect I would still say an MPLS network can be set >up without a P router, using only 2 PE routers back to back. Granted, you >will not get a good look at all the proper LDP labeling because each PE is >the ultimate, not penultimate router. However, from a VPN point of view, >all BGP sessions work, VPN labels are exchanged etc, IGP routing happens, >etc > >I guess it depends on what you are trying to do, trying to see. > >Roger Williams > >. > >Resent-Date: Fri, 25 Oct 2002 04:34:21 -0400 > >X-Authentication-Warning: host.secure4-hosting.net: mplsrc12 set sender to > >mpls-ops-request@mplsrc.com using -f > >From: Aita Federico /Consulente <Federico.Aita@albacom.it> > >To: "'mpls-ops@mplsrc.com'" <mpls-ops@mplsrc.com> > >Subject: R: [MPLS-OPS]: Minimum Network Configuration to setup MPLS > >Date: Fri, 25 Oct 2002 10:13:45 +0200 > >X-Mailer: Internet Mail Service (5.5.2655.55) > >Resent-From: mpls-ops@mplsrc.com > >X-Mailing-List: <mpls-ops@mplsrc.com> archive/latest/4705 > >X-Loop: mpls-ops@mplsrc.com > >Resent-Sender: mpls-ops-request@mplsrc.com > > > >You have a problem: > > > >to implement the MPLS, you need at least a 3 router core: > >2 PE-router > >1 P-router > > > >+2 CE-router > > > >MPLS PE takes the incoming packet and push the label, > >than, the last P does a "penultimate hop popping" by removing > >the label and pass it to a PE-router as an IP packet. > > > >So with 2 PEs only you don't have an MPLS core... > > > >Cisco implement MPLS from 2600's family to 12000... > > > >Bye > > > >Federico Aita > >Network Specialist Dati > >Cisco Certified Network & Design Associate > >Albacom > > > > > >-----Messaggio originale----- > >Da: champion boliao [mailto:mpls2000@mail.com] > >Inviato: venerd́ 25 ottobre 2002 3.55 > >A: mpls-ops@mplsrc.com > >Oggetto: [MPLS-OPS]: Minimum Network Configuration to setup MPLS > > > > > >Hi, > > > >I am struggling to understand more about MPLS network. I am currently >trying > >to setup a MPLS network in my lab. > > > >I have 4 routers, 2 Cisco 3600 series and 2 Cisco 7200 series. Am I able to > >setup a MPLS system with these element by the following configuration ? > > > > > > CE---PE---PE---CE > > > >Which routers should be treated as CE and which as PE? > >Is this the minimum routers needed to setup a MPLS network? > > > >Please give me your advice to enlighten me. > > > >Thank you very much. > >-- > >__________________________________________________________ > >Sign-up for your own FREE Personalized E-mail at Mail.com > >http://www.mail.com/?sr=signup > > > >------- > >The MPLS-OPS Mailing List > >Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml > >Archive: http://www.mplsrc.com/mpls-ops_archive.shtml > > > >------- > >The MPLS-OPS Mailing List > >Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml > >Archive: http://www.mplsrc.com/mpls-ops_archive.shtml > >------- >The MPLS-OPS Mailing List >Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml >Archive: http://www.mplsrc.com/mpls-ops_archive.shtml > >------- >The MPLS-OPS Mailing List >Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml >Archive: http://www.mplsrc.com/mpls-ops_archive.shtml ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml |
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