[mpls-linux-general] Question on outgoing_label KEY

[Helen \(Wenjing\) Z. <wzh...@si...>]

In /proc/net/mpls_out I got:

0x00000059 0/0/0 2 DS2EXP( DS(00)->EXP(00) DS(0a)->EXP(02) DS(0c)->EXP(03)
DS(12)->EXP(04) DS(14)->EXP(05) DS(1a)->EXP(06) DS(1c)->EXP(07)
DS(2e)->EXP(01) ) EXP2TC( EXP(0)->TC(ffff) EXP(1)->TC(00b8) EXP(2)->TC(0028)
EXP(3)->TC(0030) EXP(4)->TC(0048) EXP(5)->TC(0050) EXP(6)->TC(0068)
EXP(7)->TC(0070) ) PUSH(gen 11680) SET(eth0,192.168.2.2)

From the reading material, "0x00000059" is an outgoing _label KEY.

What is the relationship with Label, LSP ID and the outgoing_label KEY?
How to assign this KEY?
How and where can I find the value for this KEY except the outgoing label
table?

Thanks.

Helen