Re: [v6ops] I-D Action: draft-colitti-v6ops-host-addr-availability-01.txt

[Gert Doering <[e-mail]>]

Hi,

On Mon, Jul 27, 2015 at 03:25:18PM +0200, Andrew ????  Yourtchenko wrote:
> The disjoint nature of IA_NA means a corresponding number of TCAM
> entries is required on L3 switches.
> 
> A prefix, on the other hand, requires just an entry for the link-local
> of the host + an entry for the prefix. Regardless of the prefix
> length.

All true.  But then you excercise pressure on the prefix allocation side
- instead of having "one /64 for that LAN segment, which is big enough
for arbitrary number of hosts" you end up with "a /52[-ish] per LAN segment
to cover DHCP-PD delegation to thousands of hosts".

(Say, 1000 hosts, all doing DHCP-PD and requesting a single /64, you'd
need to provision at least a /54 per segment - which will increase your
prefix usage enormously)

Is that what you want?

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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