Jacques, The only addition I'd like to make to Sascha's comments is that we, as standard practice, allow the origination of more specifics for a probation/migration period of 3-6 months. If the prefix is larger than /24 the client is advised of it's possibilities of being blocked by tier 1 backbones. The migration period is for the client to either obtain PI space, become a registry (if the request is for a significant number of prefixes), or migrate into our PA block. There are no strict deadlines, it's reviewed at the end of agreed migration period .. this is simply encouraging the practice of drilling holes in PA aggregate blocks ... though deadlines have been imposed in some extreme cases :) Regards, Rush
Jacques,
We have the usual case of a customer asking us to route a /24 out of somebody else's PA block, which I was about to send back to the customer (or at least have him ask for authorization from the "owner" of that range to have it routed as a more specific), but I wanted to give our support people the right RIPE document that says we're not allowed to do that, and I didn't find it...
We had that issue here several times and I discussed that with many people. We actually did exactly that thing several times in the past.
The only thing that is definitely not allowed due to bgp4-specifications is to announce the same prefix from different origin-ASes. On Ciscos you would see them when doing "sh ip bgp incon".
So, is there really a document saying so, or is a customer allowed to ask that as long as he keeps a contractual relationship with the other ISP that allows him to keep the address space?
I don't think that there is some kind of document prohibiting that setup. We did that in the past and it's definitely working. The only problem is, that many ISPs don't want to set up this kind of custom configuration since it doesn't fit into their "standard procedures". Anyway, setting things up this way doesn't really differ from setting up customer's PI-Space or whatever.
Any pointers welcome.
Thanks,
Jacques.
Hope that helps!
Regards, Sascha
--- Sascha E. Pollok Internet Port Hamburg Technical Staff / Network Operations Grosse Reichenstrasse 27 D-20457 Hamburg Germany Tel.�� +49 (0)40 37 49 19-0 Fax��� +49 (0)40 37 49 19-29 Email: sp@iphh.de ICQ #38955239