Re: [mpls-linux-general] meaning of the mpls instructions

SourceForge Headquarters 1320 Columbia Street Suite 310 San Diego, CA 92101 +1 (858) 422-6466

Let me know when you have you powerpoint done, I will link it from
the mpls-linux homepage (http://mpls-linux.sf.net)

On Thu, Jun 23, 2005 at 10:05:20AM -0400, John C. Lin wrote:
> I did a similar setup like yours last week, so my memory is still fresh.
>=20
> I used the "mpls xc" command on an LSR to "cross-connect" an incoming lab=
el
> with an outgoing label. For example, here is what I did on my LSR:
>=20
> /* setup ilm to process incoming label "gen 100" via eth0, labelspace 0 */
> mpls labelspace add dev eth0 labelspace 0
> mpls ilm add label gen 100 labelspace 0
>=20
> /* setup an outgoing label "gen 101 (key 2)" via nexthop 192.168.1.3 */
> Mpls nhlfe add key 0 (returned key value 2)
> mpls nhlfe change key 2 instructions push gen 101 nexthop eth1 ipv4
> 192.168.1.3
> ip route add 192.168.1.3/32 via 192.168.1.3 spec_hn 0x8847 2
>=20
> /* "Corss-connect" the two labels together to form an LSP */
> mpls xc add ilm_label gen 100 ilm_labelspace 0 nhlfe_key 2
>=20
> My "192.168.1.3" will be your "192.168.4.4."
>=20
> To form a bi-directional LSP, you will need to setup an LSP from your LER=
-B
> to LER-A.
>=20
> I am working on a PowerPoint file to show the details of setting up a
> bi-directional LSP. I'll send it out when I am done, if there are interes=
ts.
> (This is just my notes so that I won't forget what I did to make it work =
:-)
>=20
> Cheers,
> John Lin
>=20
> > It's ok! I know what MPLS is and how it work. I understand the
> > commands nhlfe, ilm, labelspace, but I don't understand command xc.
> >=20
> > I understand the commands individually but I don't know make a network
> > with this software (with mpls command):
> >=20
> > 192.168.2.1----------LER A----------LSR------------LER B----------
> > 192.168.4.4
> >=20
> > In http://mpls-linux.sourceforge.net/ there is an example where
> > explain how configure ingress LER (LER A) and egress LER (LER B). And
> > the LSR?
> >=20
> > Configuration LER A:
> > #mpls nhlfe add key 0 instructions push gen 200 nexthop eth0 ipv4 LSR
> > Key: 0x00000002
> > #ip route add 192.168.4.4/32 via LSR spec_nh 0x8847 0x2
> >=20
> > Configuration LER B:
> > #mpls labelspace add dev eth0 labelspace 0
> > #mpls ilm add label gen 200 labelspace 0
> >=20
> > It is ok? I are not sure! because the label 200 will be changed in the
> > LSR, will not? And how I configure the LSR?
> >=20
> > Can you help me?
> >=20
> > Ra?l Gil.
> >=20
> > On 6/16/05, James R. Leu <jl...@mi...> wrote:
> > > Hi there,
> > >
> > > It seems you're new to MPLS.  If this is the can I suggest reading so=
me
> > > books of web-page that explain what MPLS is and how it work.
> > >
> > > Here are a few places to start, ofcourse a google search for MPLS will
> > > result in a lot more information to read.
> > >
> > > http://mplsrc.com/
> > > http://students.ee.sun.ac.za/~hvtonder/arc_mplsOverview.htm
> > > http://www.ibr.cs.tu-bs.de/lehre/ws0405/ks/pdf-2x1/09-l3ip_e-mpls.pdf
> > >
> > >
> > >
> > > On Tue, Jun 14, 2005 at 12:44:27PM +0200, Ra?l Gil wrote:
> > > > Hello! I am Ra?l Gil
> > > >
> > > > I have found in mailing list the mpls utility usage
> > > >
> > > > "mpls" utility usage
> > > >  --------------------
> > > >
> > > >      mpls nhlfe add key 0 instructions push gen 16 nexthop wlan0 ip=
v4
> > > > 192.168.2.1
> > > >      (output: "Key: 0x2")
> > > >      mpls ilm add label gen 16 labelspace 0
> > > >      mpls labelspace add dev eth0 labelspace 0
> > > >      mpls xc add ilm_label gen 16 ilm_labelspace 0 nhlfe_key 0x2
> > > >      mpls tunnel add dev mpls0 key 0x2
> > > >      ip route add 10.0.0.0/24 via 192.168.2.1 spec_nh 0x8847 0x2
> > > >
> > > > but I do not know that it makes each instruction (nhlfe, ilm,
> > > > labelspace, xc), I do not know that it means.
> > > >
> > > > For example, if I execute 'mpls ilm add label gen 16 labelspace 0',
> > > > what I am doing?
> > > >
> > > > Can you helpme?, please!
> > > >
> > > > Ra?l Gil.
> > > >
> > > >
> > > > -------------------------------------------------------
> > > > This SF.Net email is sponsored by: NEC IT Guy Games.  How far can y=
ou
> > shotput
> > > > a projector? How fast can you ride your desk chair down the office
> > luge track?
> > > > If you want to score the big prize, get to know the little guy.
> > > > Play to win an NEC 61" plasma display: http://www.necitguy.com/?r
> > > > _______________________________________________
> > > > mpls-linux-general mailing list
> > > > mpl...@li...
> > > > https://lists.sourceforge.net/lists/listinfo/mpls-linux-general
> > >
> > > --
> > > James R. Leu
> > > jl...@mi...
> > >
> > >
> > >
> >=20
> >=20
> > -------------------------------------------------------
> > SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
> > from IBM. Find simple to follow Roadmaps, straightforward articles,
> > informative Webcasts and more! Get everything you need to get up to
> > speed, fast. http://ads.osdn.com/?ad_idt77&alloc_id=16492&op=3Dick
> > _______________________________________________
> > mpls-linux-general mailing list
> > mpl...@li...
> > https://lists.sourceforge.net/lists/listinfo/mpls-linux-general
>=20
>=20
>=20
> -------------------------------------------------------
> SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
> from IBM. Find simple to follow Roadmaps, straightforward articles,
> informative Webcasts and more! Get everything you need to get up to
> speed, fast. http://ads.osdn.com/?ad_idt77&alloc_id=16492&op?k
> _______________________________________________
> mpls-linux-general mailing list
> mpl...@li...
> https://lists.sourceforge.net/lists/listinfo/mpls-linux-general

--=20
James R. Leu
jl...@mi...