[c-nsp] SoO For Every Route Advertised

[Alex K.]

 Hi All,

During translation from JunOS to IOS I ran into interesting problem.

Juniper CLI has an option called vrf-export. I basically replace the basic
RTs export with a policy which allows you to put any community wherever you
want. Now, in this particular network, every Juniper box attaches the same
SoO to every route it exports (per VRF, i.e. every VRF has its own SoO).

Many traffic flows are based on this idea. For instance, a router will
prefer a path to the nearest router advertising a prefix (based on matching
the SoO).

Cisco, on the other hand, does what the SoO is intended to do.

In Cisco's world, there is no way to put a SoO on each and very route being
exported from a VRF.  Cisco simply says, put a SoO on the interface
connected to the multi-homed CE and we'll do the rest. Now, that's
perfectly fine with me and that's what SoO should do in the first place but
that's not the way it goes here. We're talking of moving configuration from
some MX960 boxes to Cat6500/Sup-2T boxes and the idea to go over each and
every interface of these and put there a sitemap sounds very unattractive.
Not to mention is not as generic as it was before (i.e. Juniper attached
SoO by export policy, now we need to remember the sitemap for every
interface).

I've tried vrf export-maps (did nothing as long as SoO is concerned), per
neighbor SoO is not available.

So the question is, will somebody here can come up with a trick to
replicate JunOS behavior in a Cisco environment?



Thanks in advance,
Alex.