North American Network Operators Group

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Re: multi-homing fixes

  • From: Brian Whalen
  • Date: Fri Aug 24 20:26:15 2001

The global visibility point you address isn't that hard to solve.  Most
service providers you buy service from, if you tell em you're going to
multihome to multiple providers, well they all know that a mask longer
than /24 id to be filtered for sure and will allocate a /24 just based on
multihoming, even if a smaller portion of the ips is all that is needed.
Problems occur when you try to announce the /24 out of classful A or B

Brian "Sonic" Whalen
Success = Preparation + Opportunity

On Fri, 24 Aug 2001, Steve Noble wrote:

> On Fri, Aug 24, 2001 at 04:51:15PM -0700, Randy Bush wrote:
> > > Now on the other hand by saying "and if it's smaller then a /20 you will
> > > be filtered" you cause undue pressure on people to "spin" their designs in
> > > ways to show that they can use a /20 and get the allocation from ARIN
> > > directly.
> >
> > you mean not use nat?  should i be broken-hearted?
> NAT?!?  You are obviously not understanding the point I was attempting
> to make.
> The point was that companies may not need more then a /24 to put their
> entire site on, yet may be pushed to say they have more in order to
> acquire a /20 from ARIN, just to be globally visable.
> If you were in a position where you did NOT have your own previously allocated
> swamp/b/a space, you wanted to multihome to a few different providers
> in such a way that you were globally reachable no matter who went offline
> and you only needed a /24 or less, what would you do?
> --
> -------------------------------------------------------------------------------
> : Steven Noble / Network Janitor / Be free my soul and leave this world alone :
> :   My views = My views != The views of any of my past or present employers   :
> -------------------------------------------------------------------------------