Address block problem

[Hostmaster, Verant]

Jason, I'd agree with you for most cases, but in our case, we have a /18,
and have a few networks that are distributed geographically, and are
multihomed.  In some cases, there is an imbalance between our connectivity
to the Internet, and our connectivity within an AS.  E.g. one network might
have 2 oc12's to 2 different ISPs, but only  have a ds3 back to the rest of
our network for internal traffic.  I only have a /22 worth of address space
on that network, but I have to waste and announce an entire /20, because
that's all that Verio, mibh, and a few others, will accept from my
64.37.128.0/18 block.  

Now, had I gotten into the game a year ago, my block's first octet would
have been in the 200's, and I would be free to use /24's (which I wouldn't,
the smallest I will announce is a /22).

So possbile solutions are:
1) get in the game early (too late)
2) waste tons of address space (I hate to do this, but it works)
3) make enough noise, and tell my customers to change isp's when they can't
reach my network, and hope that these few ISP's realize that the rest of the
Internet is accepting /24's from all blocks, and their routers haven't
suffered, so they better jump on the bandwagon.

We're going with option 3 for now, and see where that takes us.

Dani D. Roisman
Verant Interactive
hostmaster at verant.com


> -----Original Message-----
> From:	Redisch, Jason [SMTP:JRedisch at virtela.com]
> Sent:	Tuesday, August 01, 2000 8:32 AM
> To:	arin-discuss at arin.net
> Subject:	RE: Address block problem 
> 
> Dani,
> 	Many ISP's have IP Space from legacy Class A space.  A check of the
> whois database would show that anyone still filtering on /8 on that space
> is
> missing a large portion of the Internet.  A simple call to their POC
> should
> fix any connectivity issues.  
> 
> 	However, several ISP's choose to filter all address space based on
> the ARIN min allocation size for that block.  They feel that they can
> reach
> the entire Internet that way while keeping routing tables on their
> networks
> to a minimum size.  This decision to filter or not is made by each ISP
> individually.  In doing so, these ISP's sometimes sacrifice more optimal
> paths, but in can still reach the entire Internet.  Announcing /24's for
> multihomed customers should work for the portion of the Internet that
> wants
> to listen to them, and the larger aggregate blocks of the upstream can be
> used to direct traffic for those ISP's that do filter at the higher bit
> boundaries. 
> 
> /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
> /\
> /\/\/\/\/\/\/\
> Jason Redisch                           (V) 720.493.5533 ext 4120 
> Virtela Communications                  (F) 720.493.5006
> Sr. IP Engineer 
> 
> 
> 
> 
> -----Original Message-----
> From: Hostmaster, Verant [mailto:hostmaster at verant.com]
> Sent: Monday, July 31, 2000 4:35 PM
> To: arin-discuss at arin.net
> Cc: Hostmaster, Verant
> Subject: RE: Address block problem 
> 
> 
> Yeah, /24's are fine as long as you're not a recent recipient of address
> space, like us.  We have a block from the 64.0.0.0/8 space, but we can't
> advertise /24's out of that block because some stick-in-the-mud ISPs out
> there still consider them from the "class A" address space, and filter
> them
> out.  
> 
> ----
> Dani Roisman
> Verant Interactive
> hostmaster at verant.com
> 
> > -----Original Message-----
> > From:	Bruce Robertson [SMTP:bruce at greatbasin.net]
> > Sent:	Monday, July 31, 00 3:20 PM
> > To:	Andy Dills
> > Cc:	arin-discuss at arin.net
> > Subject:	Re: Address block problem 
> > 
> > > Why do you force multihomed customers to get their own address space?
> > You
> > > need to be using 8 /24's to get PI space. None of my multihomed
> > customers
> > > come anywhere near qualifying.
> > 
> > Hmmm... mine do.  A couple have single /24s from the swamp that I'm
> > advertising under protest, but the rest have large blocks.
> > 
> > -- 
> > Bruce Robertson, President/CEO
> > +1-775-348-7299
> > Great Basin Internet Services, Inc.			fax: +1-775-348-9412
> > For PGP key: finger bruce at greatbasin.net
> >