[mpls-linux-general] Inheriting EXP bit in tunnel cascade

[<Jon...@cs...>]

Dear all,

I would like to dynamically set up the EXP bit of an outgoing label (say
100), and push it into an existing shared MPLS tunnel (say mpls200).
That is:

For high priority traffic:
mplsadm2 -O $opcode -o
set_exp:0x5:push:gen:100:set:mpls200:ipv4:192.168.50.1
For best effort traffic:
mplsadm2 -O $opcode -o push:gen:100:set:mpls200:ipv4:192.168.50.1

Is there any way to make the outer label (i.e. label representing
mpls200) inherit the EXP bit from an inner label? Since we are not doing
label swapping, I am not sure if the "expfwd" instruction is the way.=20

Any suggestions/comments are greatly appreciated...

Cheers,
Jonathan