mpls-linux-general

[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

[mpls-linux-general] Question on outgoing_label table

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

I am learning RSVP-TE. From one of the intermediate router, I got the
outgoing_label table(/proc/net/mpls_out) like this:

0x00000005 0/0/0 1 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(eth1,192.168.4.2)

0x0000000c 0/0/0 1 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(eth2,192.168.5.2)

0x00000018 0/0/0 1 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(eth1,192.168.4.2)

0x0000004b 0/0/0 1 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(eth1,192.168.4.2)

0x00000067 0/0/0 2 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(eth2,192.168.5.2)

There are 5 entries in this table, but only the last one with the KEY
"0x00000067" was working for the current process. I checked the
outgoing_label table again while I restarted that computer but didn't run
the RSVP-TE daemon, the first 4 entries were still there. When I started the
daemon, a new label entry came to the 5th with a fresh new KEY.

My questions are: Why there are some entries always reside in that label
table even without running RSVP-TE daemon? How can I delete those entries?

Thanks.

Helen

Re: [mpls-linux-general] Question on outgoing_label KEY

[James R. L. <jl...@mi...>]

On Mon, Jun 28, 2004 at 11:16:42AM -0700, Helen (Wenjing) Zhang wrote:
> 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?

The outgoing key is generated by the kernel.  It must be unique per
outgoing label.  Are you looking to write a script of program which
creates outgoing labels and modifies the instructions and thus needs the
outgoing label key?  If you are using mplsadm2, any newly created key is
sent to standard out.  If you want to create outgoing labels in C use the
ioctl() command.  You can use the source for mplsadm2 as an example.

> 
> Thanks.
> 
> Helen
> 
> 
> 
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-- 
James R. Leu
jl...@mi...