You will find that the binary maths is just the same (only 96 bits longer!).
As to te second part of your question, you will find that in places where you don't need to argue with IPv6 Zealots that a lot of people will utilize a /127 for these links. You run the risk of some equipment not handling it or behaving badly due to "unexpected masks", but it works and I see it a lot when taking IPv6 transit services. I see no reason to use /126 instead of a /127 except because some people are used to assigning in blocks of 4 ;) Of utilizing OSPFv3 you can even get away with nothing more than link local addresses on p2p links - though once again your mileage may vary. Regards, Kurt (@networkjanitor) On Wednesday, September 12, 2012, Bal Birdy wrote: > Ok I know that it's stipulated that IPv6 should be a /64, and never really > change, but I came across some slides talking about using /126 or /127s for > point to point links (which sparked a discussion at work). Thinking along > the lines of the /30 concept with IPv4, for arguments sake, if I wanted to > work out what IP addresses I can manually configure on either end of my p2p > link, that's using IPv6, am I right in saying I use the same approach as > with IPv4 for working out the IP addresses. > > So if I say a /126 is - 1111111111111100 in binary. The last two bits give > me networks of 0,4,8 and so on. with usable ip's of 1,2 and 3. Now the 3 > comes into play as there's no concept of broadcast in IPv6 (!?), so why do > we need the broadcast IP as previously required for IPv4??? > > Is this technically correct? > > Thanks > Bal > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
