[routing-wg] May a tier1 transit change bgp origin attribute?

Dear WG,

We (ACOnet, the Austrian NREN, AS1853) do have several upstreams. More
or less per random we detected that one of them delivers prefixes with a
different route origin parameter (IGP instead of incomplete) than
others. This obviously has a big influence in the BGP best-path
selection. After asking why this is the case we learned from them:

On 28.11.13 10:32, support at xxx.com wrote:>
> Hi Harald,
>
> The XXX standard route map sets origin IGP as standard across all
> customer learned routes...

Now we are currently debating with them whether this is ok or not. We
are arguing that the origin is an attribute that _only_ the originating
AS can set and that transit providers _must not_ change that. Especially
on (not even cheap) paid upstream connections from a tier1.

Now we would be interested what the routing-community thinks about that.
Are we picky or do they breaching best current practices?

Has anyone else (had) the same issues?

Any feedback is appreciated.

Cheers,
Harald


-- 
 Harald Michl                <harald.michl at univie.ac.at>
 Vienna University - ACOnet www.ACO.net - VIX www.VIX.at
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