North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: 16 vs 32 bit ASNs [Re: BBC does IPv6 ;) (Was: large multi-siteenterprises and PI]
On Mon, 2004-11-29 at 09:58 -0800, Owen DeLong wrote: > > --On Monday, November 29, 2004 5:41 PM +0100 Jeroen Massar > <[email protected]> wrote: > > > On Mon, 2004-11-29 at 08:35 -0800, Owen DeLong wrote: > >> > Also, with 32bit ASN's, also expect upto 2^32 routes in your routing > >> > table when each and every ASN would at least send 1 route and of course > >> > there will be ASN's sending multiple routes. > >> > > >> Only if EVERY ASN were allocated and active. > > > > *BUZZZ* ASN's are a globally unique resource, you not seeing it does not > > mean that it is not in use. For that matter anything from a prefix to a > > ASN that any of the RIR's hands out does not have to show up on the > > public internet, it could even be used by a single company internally, > > just like RFC1918 prefixes, or on a VPN etc. > > > > <SNIP> > > > Duh... You're making my point for me. There won't be 2^32 routes from 1 > route per ASN unless ALL 2^32 ASNs are assigned. You should indeed stop the drool&duh part as that is exactly not what I wrote ;) > Further, lots of ASNs get used for things that don't put routes in the > global table. (If I can't see it, it's not in the global table). > > > Which damage might that be? The prefixes are not supposed to be put in > > the global routing table and even if people did, with 16bit ASN you only > > allow 65536 routes, which is less than current IPv4... oops let's > > disable repeat mode... also see my nice comment on 6to4, that is more > > useful if you want a globally unique /48 for sure, that is if you really > > 'own' the IPv4 space of that prefix. > > > But, that "should" becomes a purely artificial barrier which will be > eliminated by market economics. Finally, with the limitations of > 16 bit ASNs (which we will surpass regardless of reclamation), we won't > likely end up with 1 prefix per ASN. The prefixes will be out there > regardless of the number of ASNs that end up originating them. Which "should" might that be, you most likely cut it. > > For that matter Ford and some other /8's are only 2002:13::/24, which is > > the same size as the 6bone space that was handed out early on. Do also > > realize that if this all becomes a peep-up and the RIR's (or actually > > IANA) runs out of space that they can try all over 7 more times, *that* > > is how much IPv6 space is available. > > > And? Stop the duh and read again ;) Greets, Jeroen Attachment:
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