How to multihome endusers [was: Cogent/Level 3 depeering]

Sun Oct 9 19:36:11 UTC 2005

Look into multi6 - which basically proposes new network layer above ip
but below tcp and that new layer would provide common end-point for 
system with multiple ip addresses.

A closer possibility right now is dns "multi-homing" based on incoming 
request ip, i.e. dns server would answer with one provider ip address if 
they are coming from cogent routed ip space and for another from l3 routed
ip space. This requires integration of bgp routing data with dns which 
has only been done by private implementations (I'm sure you all know who 
I mean) so far, but it would be a worthy project to do a open-source 
implementation of this technique if fragmentation of the internet 
continues to happen or becomes permanent.

On Sun, 9 Oct 2005, Peter Dambier wrote:

> Yes, indeed, I think it makes sense to multihome my humble enduser pc.
>
> Right now all I can get is aDSL and it does not matter what provider
> because they all use DTAG.DE infrastructure.
>
> Maybe cable will be choce. It is not as fast as aDSL at least not here
> and it will take another two or three years until they deploy it. If
> it does not get shot on site again by the regulation office or the
> cartell office again.
>
> So I will end up having a cable-modem speaking ethernet/PPPoE and an
> aDSL-modem speaking ethernet/ tcp/ip and DHCP.
>
> My ip adresses probably will be 84.167.xxx.xxx for aDSL and
> 24.xxx.xxx.xxx for the cable.
>
> I can talk to no-ip.com, they will allow a second ip for
>
> host_look("84.167.252.166","echnaton.serveftp.com","1420295334").
> host_name("84.167.252.166","p54A7FCA6.dip.t-dialin.net").
>
> Its entry will look a bit like this one:
>
> host_look("81.88.34.51","Kunden2.KONTENT.de","1364730419").
> host_name("81.88.34.51","kunden2-1.kontent.de").
> host_look("81.88.34.52","Kunden2.KONTENT.de","1364730420").
> host_name("81.88.34.52","kunden2-2.kontent.de").
>
> So I will end up with 3 names and 2 ip addresses for my humble
> host.
>
> Do I need BGP now or OSPF or can I rely on RIP.
> Do I need an AS number?
> How do I get it?
>
> Imagine not a fool like me is asking this but some 32K end
> users of DTAG.DE connected to a DSLAM at Franfurt/Main in
> germany.
>
> I guess the number of end users disconnected be Cogent and
> Level 3 is not much smaller.
>
> Asbestos parapluis opened.
> Shoot now!
>
> Peter and Karin Dambier :)
>
>
>
> Valdis.Kletnieks at vt.edu wrote:
>> On Sat, 08 Oct 2005 20:41:55 BST, "Stephen J. Wilcox" said:
>> 
>>> my rule would be if your provider can manage an autonomous system better 
>>> than you and multihoming isnt a requirement of your business then let 
>>> them take on the management
>> 
>> 
>> I'm willing to bet there's a lot of single-homed customers of both Cogent 
>> and
>> L3 that 2 weeks ago didn't think multihoming was a requirement of their
>> business either, who now are contemplating it.  Plus possibly some 
>> single-homed
>> customers of other large providers as well.
>> 
>> Anybody want to start a pool on how many new AS numbers will get issued as 
>> a
>> result of this tiff, and what percent will commit a BGP whoopsie that 
>> impacts
>> more than just themselves within the first 6 months?
>> 
>> On the other hand, I see a business opportunity to sell new customers 
>> insurance
>> against self-inflicted gunshot wounds to the feet here.  Some providers 
>> might
>> even consider selling a managed service at a slight loss, just for 
>> self-defense.. :)
>> 
>
>
>

-- 
William Leibzon
Elan Networks
william at elan.net