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Re: IPv6 Multi-homing BOF at NANOG 35

Mohacsi Janos wrote:

Dear all,

On Tue, 4 Oct 2005, John Payne wrote:



On Sep 25, 2005, at 12:48 PM, Iljitsch van Beijnum wrote:
NANOG = network operators in the sense of ISPs and the like. The solution that the shim6 is working on does NOT apply to this demographic.
Whoa there. The NANOG community (as well as other ISP communities) is hugely affected by shim6.
They are the ones who will be fielding customer calls about multihoming - "why can't I just setup BGP like I always have done?". Not everyone at NANOG is going to be big enough to get a /32, but most of the ISPs there are at least multihomed today.
I for one am looking forward to both the BoF and Jason Schiller's general session topic.
I think most of the ISP who are seriously thinking about IPv6 have to have the ability to have a multihoming solution - getting PI-like address (nowadays it is /32). 

The point of shim6 is to *avoid* the need for PI-like space
for multihomed sites, so that we don't do to the IPv6 BGP table
what multihoming is doing to the IPv4 BGP table. We need IPv6
to scale vastly more than IPv4, so this is essential.

I hope the proposed BOF will make this clearer. I personally
think that shim6 will be really cool for ISPs, although as Geoff
says it will take a while to deploy and during that time we'll
need a PI-like approach.

    Brian



For end-systems/customers/enterprises
might agree with upstream providers to accept more specific (and upstream can agree to exchange more specific inside country/region, but announce aggregate to global Internet) or use RFC3178 method (using tunnels) which is quite powerful technique. Any method can be implemented with careful BGP routing policy configuration. The shim6 is attractive method, but requires changes in host and router IPv6 implementations and this requires at least 5 years to be widely accepted....
Shim6 can be a long term solution, but shorter time-frame the operator/provider/user community can use existing methods to support/use multihoming. We can strart using it and if there is some problem we can speak up at NANOG/RIR etc meetings. 


Regards,


Janos Mohacsi
Network Engineer, Research Associate
NIIF/HUNGARNET, HUNGARY
Key 00F9AF98: 8645 1312 D249 471B DBAE  21A2 9F52 0D1F 00F9 AF98




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