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Re: Scalability issues in the Internet routing system
On Wed, 19 Oct 2005, Andre Oppermann wrote:
the rationale behind MPLS. However here we need something that administratively and politically works inter-AS like prefix+BGP today. Maybe the new 32bit AS number may serve as such a perfect match routing identifier.
That'd make up to 4 billion possible entries in the DFZ routing system. Or about 16k at todays size of the DFZ. One AS == one routing policy.That means though that we still need a way for people without an ASN to multi-home. Because clearly the number of ASNs is quite restricted compared to the number of IPv6 prefixes. So:
- we need to change that 4-byte AS draft to (4+X)-byte ASNs
sharpish, X should be 4 probably (good luck with that). And change
all IPv6 stacks in routers (and hosts, but that's easier).
- we also need $AREA allocated IPs (which obviously operators would
love to work on implementing)
- we still will have some end-host "probe with every source address"
and "change every stack" solution, one which adds a sort of
supra-net to the internet which is only visible to end-hosts with
Seems to me at least, pre-coffee.
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