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IP4 Space

On Thu, Mar 4, 2010 at 1:52 PM, Thomas Magill
<tmagill at providecommerce.com> wrote:
> 1. ? ? ? ?Why don't providers use /31 addresses for P2P links? ?This
> works fine per rfc 3021 but nobody seems to believe it or use it. ?Are
> there any major manufacturers out there that do not support it?

Because those who want to hyper-optimize use a /32 loopback address on
each router instead and rely on SNMP instead of Ping to determine
whether an interface is up.


> 2. ? ? ? Longer than /24 prefixes in global BGP table. ?The most obvious
> answer is that some hardware may not handle it...

That's the most obvious answer?



On Thu, Mar 4, 2010 at 2:12 PM, Joel Jaeggli <joelja at bogus.com> wrote:
> handling the v6 table is not currently hard (~2600 prefixes) while long
> term the temptation to do TE is roughly that same in v6 as in v4, the
> prospect of having a bunch of non-aggregatable direct assignments should
> be much lower...

Because we expect far fewer end users to multihome tomorrow than do today?

Regards,
Bill Herrin


-- 
William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
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