Re: [Idr] Color domains in BGP routes with color

[Robert Raszuk <[e-mail]>]

All,

My intention is to illustrate that for each of the two proposals below
> that as routes go from one domain to another that there are situations
> where
> remapping may have issues.


Practically speaking I am not so sure about the value of complexity
introduced by the notion of remapping colors at domain boundaries. That
goes against the KISS principle.

Instead of remapping I would simply propagate tuples (ASN-Color). Now the
meaning of color in each domain has to be known via some form of publishing
it. Be it a web page or pub-sub or xyz is a different topic.

Why do we need to keep colors flat ? Moreover colors signalled by BGP
interdomain may not be the same as intradomain colors as build by some
constrained protocol.

Here is why I posting the above doubt:

* if things are under same admin control we could presume there is no
issue. When you build policy which takes into account each domain's color
mapped to some anchor points (on the edge or within a domain) and therefor
end to end path will likely be formed and work as expected

* if things are not under same administration each color/class may mean
completely separate thing unless we define in stone what it should mean.
And if we do that there is no need to remap anything any longer.

Thx a lot,
R.