Hey, you nailed me on the head! I have a /48 from ARIN and tried to advertise a /51 in datacenter 1 and a /51 in datacenter 2. Upstream, in massive quantity, rejected all advertisements < /48.
Which, unfortunately, is a problem. That means if I want to use my own address space in two datacenters, I have to go get another /48 for the other datacenter. This will indeed grow the routing table, when I have no need for so much address space. Scott On Wed, May 12, 2010 at 4:31 AM, George B. <[email protected]> wrote: > On Wed, May 12, 2010 at 12:50 AM, Rolf Hanßen <[email protected]> wrote: > > Hi, > > > > it looks to me you calculate with an amount of v6 routes similar to the > > number of v4 routes today and I thinks that this won't happen. > > For example: RIPE has assigned 5x IPv4 PA networks to us during the last > > 10 years but we only use one /32 v6 network. We furthermore had to splitt > > up those v4 assignments because we have a split network with several > > independent locations not connected together. This increased the number > of > > prefixes we announce very fast. > > So the amount of v6 prefixes created from us will be much lower and I > > think other providers may have similar spaces they use. > > Even if you enable v6 for all networks currently using v4 I think total > > amount will keep below 100k routes. > > > > kind regards > > Rolf > > For people who can qualify for a /32, particularly those who grew late > in the game, yes, there will be considerable consolidation. What I > was more concerned about was smaller end user networks who currently > have a multi-homed /20 or smaller allocation that will be getting a > /44 or smaller v6 allocation and will keep both the v4 and v6 > addresses. > > There are a lot of multi-homed /24 nets out there that will become a > /24 v4 and a /48 v6 announcement. I suppose the vendors could help > things somewhat by not putting the entire 128 bits into hardware. > There is really no reason to have more than 64 bits for routing as the > last 64 bits are "supposed" to be host IPs ... but how many out there > are using /127 for point-to-points between routers? You aren't > "supposed" to subnet anything smaller than a /64 but many do. > > One thing I have noticed is that some networks are apparently > filtering anything smaller than a /32 from PA space but allowing > smaller nets from PI space designed for that purpose (down to a /48, I > think). Anyone trying to multi-home a /64 is going to have a hard go > of it, I think, but someone is bound to try! > > George > > _______________________________________________ > foundry-nsp mailing list > [email protected] > http://puck.nether.net/mailman/listinfo/foundry-nsp >
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