On (2012-05-31 08:46 -0700), David Barak wrote: > On what precisely do you base the idea that a mandatory transitive attribute > of a BGP prefix is a "purely advisory flag which has no real meaning"? I > encourage you to reconsider that opinion - it's actually a useful attribute, > much the way that MED is a useful attribute. Many providers re-write MED, > and apparently some re-write ORIGIN. Neither of those is "network abuse" - > it's more accurately described as "network routing policy." As has been > stated here before: your network, your rules.
When provider rewrites MED, they do it, because they don't want peer to cause them to cold-potato, to which they may have compelling reason. Then some clever people realise they forgot to rewrite origin, working around the implicit agreement you had with them. -- ++ytti
