From: Lupi, Guy (Guy.Lupi@eurekaggn.com)
Date: Mon Nov 11 2002 - 17:48:20 GMT-3
I have been assigned /20s by ARIN before, their new policy allows for this,
the link is below. Most providers will accept any /24, some will only
accept /24s if they are out of the traditional class C address space
(192-223). I believe Verio is one of these.
http://www.arin.net/policy/ipv4.html#requirements
-----Original Message-----
From: Hamele Kassa [mailto:hkassa@attrmc.net]
Sent: Monday, November 11, 2002 3:38 PM
To: dmadlan@qwest.com
Cc: Brian T. Albert; ccielab@groupstudy.com
Subject: Re: BGP & multihoming
Madan,
You are correct ISP's accept advertisement as long as /24. For the
individual customer(not an ISP) to secure an address space from ARIN, the
network must be large enough that requires address space /19 or more. In
addition some ISP's do not accept networks with longer prefixes than /19 (
/20,/21 etc) from the peers ISP's, which will cause connectivity problem
with redundant links depending on what is being advertised.
rgs,
HK
----- Original Message -----
From: "MADMAN" <dave@interprise.com>
To: "Hamele Kassa" <hkassa@attrmc.net>
Cc: "Brian T. Albert" <brian.albert@worldnet.att.net>;
<ccielab@groupstudy.com>
Sent: Monday, November 11, 2002 3:22 PM
Subject: Re: BGP & multihoming
>
> I keep seeing people refer to this /19 as the smallest aggregate that
> will be accepted by a provider though I have yet to meet this provider.
> I have set up several customers with dual home full routes and they
> announce a single /24 network or maybe a couple but very few have /19 or
> better. The providers I have worked with that accepted the /24 include
> Qwest, MCI, Sprint, Onvoy, and AT&T come to mind.
>
> Dave
>
> Hamele Kassa wrote:
> >
> > Brian,
> >
> > You do not need to secure your own registered address/es(your network
has to
> > be bigger than /19 space to qualify). The IP address/es assigned to you
> > from your providers (/24 or shorter address space) will work for you as
> > long as you are running BGP(no longer prefix than /24). However you
need to
> > secure and AS from ARIN(if you are multihomed you will qualify).
> >
> > I hope this helps.
> >
> > HK
> >
> > ----- Original Message -----
> > From: "Brian T. Albert" <brian.albert@worldnet.att.net>
> > To: "MADMAN" <dave@interprise.com>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Sunday, November 10, 2002 10:51 AM
> > Subject: RE: BGP & multihoming
> >
> > > When you say "your own registered address/es", do you mean prefixes
> > assigned
> > > to you from your 2 providers or obtained from another authority? What
> > other
> > > authority can assign you prefixes independent of you providers, and
what
> > are
> > > the requirements to obtain them?
> > >
> > > BA
> > >
> > > -----Original Message-----
> > > From: MADMAN [mailto:dave@interprise.com]
> > > Sent: Saturday, November 09, 2002 9:12 PM
> > > To: Brian T. Albert
> > > Cc: ccielab@groupstudy.com
> > > Subject: Re: BGP & multihoming
> > >
> > >
> > >
> > > You don't need NAT if you have your own registered address/es. No
> > special
> > > config required, you simply announce your public address/es
> > >
> > > Dave
> > >
> > > "Brian T. Albert" wrote:
> > >
> > > > In the real world can BGP multihoming to 2 different providers be
> > > > accomplished without NAT for the internal networks? I have found
some
> > > links
> > > > on CCO http://www.cisco.com/warp/public/459/BGP-PIX.htm that show
how to
> > > do
> > > > it with NAT, but is it possible without. If so, can someone supply
some
> > > > config examples or good links.
> > > >
> > > > Thanks
> > > >
> > > > Brian T. Albert
> > > > brian.albert@worldnet.att.net
> > >
> > > --
> > > David Madland
> > > CCIE# 2016
> > > Sr. Network Engineer
> > > Qwest Communications Inc.
> > > 612-664-3367
> > > dave@interprise.com
> > >
>
> --
> David Madland
> CCIE# 2016
> Sr. Network Engineer
> Qwest Communications
> 612-664-3367
>
> "You don't make the poor richer by making the rich poorer." --Winston
> Churchill
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