[j-nsp] EXP based LSP selection

[Adam Vitkovsky]

Hi folks,

How do ya’ll do the below in Junos?
On a core router send EF traffic via one LSP and BE via other LSP.

CR1:
class-map type traffic match-any PBTS_C-MAP_EF
  match mpls experimental topmost 5
end-class-map
!
policy-map type pbr PBTS_P-MAP
 class type traffic PBTS_C-MAP_EF
   set forward-class 5
 class type traffic class-default
end-policy-map
!
interface Te0/0/0/0
  description ingress-mpls-interface
  service-policy type pbr input PBTS-PMAP
!
interface tunnel-te501
  forward-class 5


In Junos I found out that except static route only policy can set LSP next hop (either via "install-nexthop lsp" or via  "cos-next-hop-map" ). But the policy is applied to FIB so I can match only on route properties rather than on actual packet properties.
And with FW filter I can match exp 5 but can't set next-hop.
Do I understand my options correctly or am I missing something.

On a PE I guess I could use the policy to match all other PE's NHs and then set LSP (so that i won't loop packets coming to me to the LSP) - complex.
Or I could use FW filter and the ("then VRF" + vrf statically routed to LSP) trick -which obviously does not scale.

I'll appreciate any pointers.

adam









        Adam Vitkovsky
        IP Engineer

T:      0333 006 5936
E:      Adam.Vitkovsky at gamma.co.uk
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