>Does that mean registering with RADB guarantee global routability ?
It will make it more likely, but NOTHING guarantees global routability.
>
>
> ----------
> From: Howard C. Berkowitz [SMTP:[EMAIL PROTECTED]]
> Sent: Thursday, September 28, 2000 10:40 PM
> To: [EMAIL PROTECTED]
> Subject: RE: RADB - BGP routing
>
> Being assigned PI space does NOT guarantee global routability. See
>RFC 2050.
>
> In the real world, prefixes shorter than /21 will probably be
> globally routable. Indeed, /24 may very well be routable. Hint: do
>
> NOT call a /24 a Class C. Registries and providers get very
> suspicious of addressing plans
> in which everything falls on a /24 or /16 boundary.
>
> But the address registries -- APNIC, RIPE NCC, and ARIN -- do not
> control what prefix length filters are implemented by providers. No
>
> organization guarantees global reachability, because no organization
>
> controls global routing.
>
> Incidentally, the registries may differ in other policies. RIPE NCC
>
> now requires that you must register your routing policies before
> being assigned an AS.
>
> It's not even as simple as length. Some filter policies are on the
> NANOG web page. A given carrier, for example, may permit a /24 from
>
> the 192/8 "traditional" or "swamp" space, but not permit a /24 from
> more recently assigned blocks for which people are expected to know
> about CIDR.
>
> Unfortunately, a lot of this real-world global routing conventions
> are not well documented. My understanding of them began with
> RIPE-181, which was superceded by RPSL. That simply taught me the
> language. A good working knowledge comes from daily reading of
> NANOG, RIPE, and APNIC mailing lists, and, even then, I need to
> discuss policies with every specific provider involved in a
> particular peering situation.
>
> There's good news, I suppose, that Cisco certifications and global
> routing practice have little to do with one another.
> There's bad news, I suppose, that Cisco certifications and global
> routing practice have little to do with one another.
>
> Guilherme Spolidoro wrote,
>
> >If APNIC gave you only a single class C, yes.
> >
> >The bottow line is: you need to follow the APNIC rules. If they
>assigned a
> >class C to you is because their current rules for that class C
>range is to
> >assign on a /24 manner. Most likely they have other blocks of class
>C that
> >they assign on CIDR mode.
> >
> >Does it help?
> >
> >From: Benny Leong (HTHK - Senior Engineer II - iServices
>Development,
> >NNSD) [mailto:[EMAIL PROTECTED]]
> >Sent: Thursday, September 28, 2000 2:19 AM
> >To: 'Brian'
> >
> >I have PI class C address applied from APNIC. Am I globally
>routable ?
> >
> > ----------
> > From: Brian [SMTP:[EMAIL PROTECTED]]
> >
> > On Wed, 27 Sep 2000, Benny Leong (HTHK - Senior Engineer II
>-
> >iServices Development, NNSD) wrote: >
> > > >From the ARIN, there is a statement shown below :
> > >
> > > *The minimum block of IP address space assigned by ARIN is
>a /20.
> >Smaller
> > > blocks obtained directly from ARIN are the least likely to
>be
> >globally
> > > routable.
> > >
> > > What does that mean ? Thanks.
> >
> > It means that if you got an allocation from arin of say a
>/24, /23,
> > etc. That its the least likely space to be routable. Back
>in the
> >day,
> > ARIN would allocate a /24 to just about anyone on the net
>with a
> > presense......this space is not part of any provider
>aggregate, and
> >its
> > the least likely to be routable.
> >
> > > ----------
> > > From: Spolidoro, Guilherme
> >[SMTP:[EMAIL PROTECTED]]
> > > Sent: Monday, September 25, 2000 9:15 PM
> >
> > > You can find a lot of information about RADB on the
>RADB.net
> >web
> > > site. The
> > > problem is that I never found some examples or
>explanations
> >on how
> > > large
> > > ISPs use the information stored on the IRRd servers
>on real
> >life.
> > > Maybe
> > > somebody with more experience could comment about
>that.
> > >
> > > Anyway, RADB runs an IRRd server that is used to
>store each
> >ISP
> > > routing
> > > policy, for example: what are your AS numbers, your
> >networks, what
> > > networks
> > > you'll accept from ISP xxx or what networks you're
>going to
> > > advertise to ISP
> > > wwww (just two simple examples). You write your
>policy using
> >a
> > > specific
> > > language (like an script) that can be used to
>configure the
> >BGP on
> > > your
> > > NAP/MAE routers.
> > >
> > > There are serveral IRRd servers and RADB.net host
>the
> >"official" one
> > > for the
> > > US. RIPE has another server for Europe and some ISPs
>have
> >their own
> > > server.
> > > I'm not sure why an ISP would want to have his own
>IRRd
> >server, but
> > > my guess
> > > is that they probably use that information to know
>what are
> >their
> > > customers's BGP policies for them, i.e. what
>networks their
> > > customers will
> > > advertise for them so they can configure the BGP
>filters
> >properly.
> > >
> > > I know of at least one ISP that won't accept any
> >advertisement from
> > > their
> > > customers unless register on the RADB IRRd server.
> > >
> > > It's my opinion that since everybody can use the
>information
> >on the
> > > IRRd
> > > servers as they want, it's always good to keep it up
>to date
> >so you
> > > don't
> > > have somebody blocking your networks because you
>didn't
> >register
> > > your latest
> > > policy there.
> > >
> > > Good luck.
> > >
> > > -----Original Message-----
> > > From: Benny Leong (HTHK - Senior Engineer II -
>iServices
> > > Development,
> > > NNSD) [mailto:[EMAIL PROTECTED]]
> > > Sent: Monday, September 25, 2000 2:09 AM
> > > To: '[EMAIL PROTECTED]'
> > > Subject: RADB - BGP routing
> > >
> > > What is the use of RADB ?
> > > Is it a must to register AS number and the route to
>the RADB
>
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