[mpls-linux-general] Question regarding MPLS tunnels and tunnel command is not working.

[Siddhardha N. G. <ga...@gm...>]

Hi,
I am trying to understand MPLS tunnel concept  and according to RFC 3812, a=
n
explicitly routed LSP (ERLSP) is referred to as an MPLS tunnel. I am
planning to connecting my router (CE) to a PE on a T1 link using MPLS
tunnel. I have only source and destination nodes  and i am setting up a LSP
in between them. I dont have any intermediate nodes. Destination node is in
one hop reach. If i make this LSP into a tunnel will it be conceptually
right?

My understanding of Explicit routing is you have various paths available
from source to destination and you specify a specific path. Since i have
only one path here, it is no different from regular LSP. Can someone explai=
n
to me PLs?

Also, I compiled and installed MPLS kernel and i was able to setup LSP in
between two linux boxes. I am trying to create a tunnel using mpls tunnel
command and i am having some trouble. Here is a screen shot..

root@darkstar:/home/sid# mplsversion
1.950

root@darkstar:/usr/sbin# mpls nhlfe add key 0
NHLFE entry key 0x00000003 mtu 0 propagate_ttl
         (0 bytes, 0 pkts)
root@darkstar:/usr/sbin# mpls tunnel add dev eth0 nhlfe 0x3
Option "add" is unknown, try "mpls -help".

any help?


Thanks,
Sid