On 27 Nov 2007, at 11:35, Hank Nussbacher wrote:
This may have been covered before but I'm not sure. I have a client that needs a /24 in Europe, a /24 in AP and a /24 in North America - all for multihoming purposes (in each area). If he becomes a RIPE member, can he get the 3 /24s and 3 ASNs of which only one set will be used in Europe? Or just get the /19 like everyone else, and carve it into 3 chunks and route them each from a different area?
It's normally a /21, which is enough for eight /24 networks - with a caveat. Some networks, to reduce the effects of deaggregation on their routing table size, will filter on the cidr boundaries that RIPE use as minimum allocation size. If you went down the PA route, the addresses would come from a range which some people filter to a /21 smallest subnet size. If you go down the PI route, you will be burning through less IP space and additionally will get your addresses from a range that people are less likely to filter /24s in. Andy