From: Joe Mama (jsmith1234550@gmail.com)
Date: Thu Sep 06 2007 - 22:14:18 ART
If you are not multihomed then you probably will have a very tough
time justifying a public AS....especially when there is a range for
private ASs that most smaller and less complicated setups use all of
the time....
You may want to take a look at Halabi's BGP book as it is quite
practicial and spot on. it goes in to may different reasons for
needing and not needing an AS.....
Just to throw it out there, you may not even need BGP if you are not
multihomed.....
Joe
On 9/6/07, Gabriel Nunes <gabriel.nunes@gmail.com> wrote:
> Hi,
>
> My question is just about the second option, when you are not multihomed...
>
> But feel free to discuss this as welll...
>
> Gabriel Nunes CCIE#17737
>
>
> On 9/6/07, Scott Morris <smorris@ipexpert.com> wrote:
> >
> > I'm not sure that's going to justify it as those Ips are not owned by you.
> > Do you have permission to multihome advertising those more specific
> > prefixes
> > from both sides?
> >
> > I'm not sure where you're seeing the /9 from because out of the 63.x.x.x
> > block, Verizon (old UUNet) owns 63.0.0.0/9 but advertises it as eight /12s
> > plus a bunch more specific (assuming other assigned customers multihome).
> >
> > smorris@Emanon-Edge-J4300> show route 63.0.0.0/8 terse | match /9
> >
> > smorris@Emanon-Edge-J4300> show route 63.0.0.0/8 terse | match /12
> > * 63.0.0.0/12 B 170 100 12.118.111.101 7018 701
> > I
> > * 63.16.0.0/12 B 170 100 >12.118.111.101 7018 701
> > I
> > * 63.32.0.0/12 B 170 100 12.118.111.101 7018 701
> > I
> > * 63.48.0.0/12 B 170 100 >12.118.111.101 7018 701
> > I
> > * 63.64.0.0/12 B 170 100 12.118.111.101 7018 701
> > I
> > * 63.80.0.0/12 B 170 100 >12.118.111.101 7018 701
> > I
> > * 63.96.0.0/12 B 170 100 12.118.111.101 7018 701
> > I
> > * 63.112.0.0/12 B 170 100 >12.118.111.101 7018 701
> > I
> > * 63.144.0.0/12 B 170 100 >12.118.111.101 7018 209
> > I
> > * 63.160.0.0/12 B 170 100 12.118.111.101 7018
> > 1239
> > I
> > * 63.192.0.0/12 B 170 100 12.118.111.101 7018
> > 7132
> > I
> > * 63.224.0.0/12 B 170 100 12.118.111.101 7018 209
> > I
> >
> > smorris@Emanon-Edge-J4300> show route 65.0.0.0/8 terse | match /12
> > * 65.0.0.0/12 B 170 100 >12.118.111.101 7018
> > 6389
> > I
> > * 65.112.0.0/12 B 170 100 12.118.111.101 7018 209
> > I
> > * 65.224.0.0/12 B 170 100 >12.118.111.101 7018 701
> > I
> >
> > Qwest on the other hand advertises 65.112.0.0/12 and 362 more specific
> > routes.
> >
> > smorris@Emanon-Edge-J4300> show route 65.112.0.0/12 terse | count
> > Count: 363 lines
> >
> > smorris@Emanon-Edge-J4300>
> >
> > Get permission first from your upstreams (Verizon 'n' Qwest) then fill out
> > your forms with ARIN in order to request an ASN.
> >
> > HTH,
> >
> >
> > Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
> > #153, CISSP, et al.
> > CCSI/JNCI-M/JNCI-J
> > VP - Technical Training - IPexpert, Inc.
> > IPexpert Sr. Technical Instructor
> >
> > A Cisco Learning Partner - We Accept Learning Credits!
> >
> > smorris@ipexpert.com
> >
> > Telephone: +1.810.326.1444
> > Fax: +1.810.454.0130
> > http://www.ipexpert.com
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > Joseph Brunner
> > Sent: Thursday, September 06, 2007 4:17 PM
> > To: 'Gabriel Nunes'; 'Cisco certification'
> > Subject: RE: Requesting an AS number
> >
> > Here is what I used 6 years ago to justify my AS #
> >
> > Our network is multi-homed to two AS's that will not advertise our network
> > prefix with the network length associated with our external addressing.
> > Only
> > our AS will advertise this prefix to the global internet. Our network
> > policy
> > involves advertising 63.X.X.X/24 and 65.X.X.X/24 from behind AS 701 & AS
> > 209. These networks only advertise 63.X.X.X/9 and 65.X.X.X/12.
> >
> > The longer /24 prefix is required to influence inbound traffic flow and
> > redundancy.
> >
> > -Joe
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > Gabriel Nunes
> > Sent: Thursday, September 06, 2007 3:54 PM
> > To: Cisco certification
> > Subject: Requesting an AS number
> >
> > Hi all,
> >
> > Does someone know to explain exactly what routing policy requirements is
> > the
> > last option bellow:
> >
> >
> > When completing the template, your organization must first establish
> > justification for the request. Justification can be made by meeting at
> > least
> > one of the following two requirements.
> >
> > Multi-homed:
> >
> > If your organization is multi-homed, or intends to be multi-homed within
> > the
> > next thirty (30) days, you must show exactly how your organization is
> > connected to the Internet by providing the following information:
> >
> > 1. Exterior gateway protocol to be used
> > 2. The IP network addresses presently in use on the network
> > 3. The AS number and name of each upstream provider and/or peer
> >
> > Unique Routing Policy:
> >
> > *Your organization must demonstrate how the routing policy of the AS will
> > differ from the routing policies of its border peers*
> >
> > Thanks,
> >
> > Gabriel Nunes CCIE#17737
> >
> > _______________________________________________________________________
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> >
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