subnet prefix length > 64 breaks IPv6?
sthaug at nethelp.no
sthaug at nethelp.no
Sat Jan 7 13:24:28 UTC 2012
> "Note: An IPv4 route requires only one TCAM entry. Because of the
> hardware compression scheme used for IPv6, an IPv6 route can take
> more than one TCAM entry, reducing the number of entries forwarded
> in hardware. For example, for IPv6 directly connected IP addresses,
> the desktop template might allow less than two thousand entries."
>
>
> Translated: "The stated numbers for IPv6 routes are twice the real max.
> However, prefix compression may give better utilisation under certain
> conditions".
Thanks, that's the first *specific* information I've seen of equipment
that might have problems (reduced number of entries) with longer than
64 bit prefixes. Fortunately we're not using 3560/3750 for IPv6 routing
at the moment.
Any other takers?
Steinar Haug, Nethelp consulting, sthaug at nethelp.no
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