[Xorp-users] How to AS prepend ?

[Sébastien Namèche]

Hi everybody,

I am new to Xorp (say 3 days). I'm doing some tests and comparisons  
between Quagga, OpenBGP and Xorp.
And Xorp is nice.

We want to redistribute some (carefully selected) OSPF routes to BGP.  
This works.
However, there is still something I can't do : AS prepending.

My configuration is :

.../...
     bgp {
         bgp-id: A.B.C.34
         local-as: "64512"
         peer "A.B.C.33" {
             local-ip: "A.B.C.34"
             as: "65042"
             next-hop: A.B.C.34
             import: "filter_bgp_std"
         }
         export: "ospf_to_bgp"
     }
.../...
     policy-statement "ospf_to_bgp" {
         term ip1 {
             from {
                 protocol: "ospf4"
                 network4: X.Y.Z.0/23
             }
             then {
                 as-path-prepend: 64512
             }
         }
     }
.../...

The prefix "X.Y.Z.0/23" is announced to my peer since I know it from  
my OSPF neighbor. But the AS path seen by my BGP peer is (only) "64512".

I have carefully read the doc, crawled other Google and made several  
tests with several configurations (and also played with "as-path- 
expand"). But still can't find how to do it. Now, I have a terrible  
headache  ;o)

What am I doing wrong ?

Thanks,

-- 
Seb

“Un peuple prêt à sacrifier un peu de liberté pour un peu de sécurité
  ne mérite ni l’une ni l’autre, et finit par perdre les deux.”
  -- Thomas Jefferson.