[nm-wg] Re: [I2G2-Proto] NMWG schema comments (mainly about IPv6 and multicast)
Dan Gunter
dkgunter at lbl.gov
Fri Aug 26 17:13:19 CDT 2005
>
> Dan,
> It is not a caching issue. It is that ifName & IP Address are not
> sufficent to uniquely identify an interface in all cases.
>
OK, clearly I didn't understand this whole issue, sorry. What you're
saying is that you need N additional identifiers in addition to IP and
interface. So: is N=1 sufficiently general? Or should the model allow
N=2+ as well? (IP=x,IF=y,chassis=z,...)
-Dan
> IP addresses are not guaranteed to be unique. Interface names are not
> unique.
> For example, we have plans to deploy around 4 different DNS servers
> using anycast. All will have the same IP address. All the different
> router
> interfaces connected to the different servers will have the same IP
> address.
> It is possible that they could all be on ge-1/0/0. The name of the
> router or chassis is required to distinguish between the connection to a
> DNS server in California vs one in New York.
>
> I think this concept is generally applicable. Especially if you consider
> deployment in networks that use nat or private address space where you
> could have lots of collisions, not just a couple per network.
>
>
> --Joe
>
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