HI Geroge, Thanks for the input. Appreciate some more info wrt TCAM usuage if possible.
Another thought, I agree ip schema is individual preference, but I want to know the best practise (vague term best practice). Personally even I am in favor of /64 p-t-p. Regards, Vikas On Wed, Feb 9, 2011 at 12:11 PM, George Bonser <gbon...@seven.com> wrote: > > I am looking for the recommendation for core interfaces IP addressing > > schema > > for Ipv6. Some different views are (PE- P - PE, point to point link) > as > > below - > > > > 1- Use Public Ipv6 with /122 and do not advertise to Internet > > 2- Use Public Ipv6 with /127 and do not advertise to Internet > > 3- Use Unique local ipv6 address > > 4- Use Public Ipv6 with /64 > > > > Also I am interested to understand the impact on TCAM ... > > > > Regards, > > Vikas > > I would use a /64 with ND turned off and static neighbors configured. > TCAM impact will depend on vendor. Some vendors give you the option of > storing the first 64 bits of a V6 IP or the entire address. Using a /64 > means your CAM usage might be less depending on your vendor. > > If the addresses on the point-to-point links never accept or source > direct traffic to/from outside your net, you can use whatever you want > on them. ULA might be ok there. I am using public IPs but I filter > traffic destined for them at the edge but to each their own choice. But > if you use ULA you aren't going to be able to ping anything outside your > net if you source the pings from the ULA interface. Just something to > keep in mind. > > What you are asking is a matter of individual preference. > >