[mpls-linux-general] Label stacking example

[Birger <bto...@ex...>]

Hello,

I have the following lab network:

  --[R1]--[R2]--[R3]--[R4]--

I successfully set up manually an LSP from R1 to R4.  However, I now
want to set up additional label stacking between R2 and R3 manually(!)
for demonstrative purposes ("look, this is how label stacking works"). =20

Unfortunately I was not able to do this neither with the "mplsadm2" nor
with the "mpls" command (I prefer to use the latter).  Note that I do
*not* want to use tunnel interfaces.  Is there a neat way to get it done
without using IP/tunnel ifs?

My guesss was to set up appropriate NHLFE entries, like

  mpls nhlfe add key 0x10 instructions nexthop eth0 push gen 1234

but all I get is "MPLS: invalid last op PUSH, len =3D 1(1)", so I'm not
sure what went wrong here....


Regards,
--=20
Birger T=F6dtmann
 Technik der Rechnernetze, Institut f=FCr Experimentelle Mathematik und I=
nstitut=20
 f=FCr Informatik und Wirtschaftsinformatik, Universit=E4t Duisburg-Essen=
, Campus Essen
 email:bto...@ex... skype:birger.toedtmann pgp:0x6FB1=
66C9