RE: RADB - BGP routing
>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 RIPE-181, which was superceded by RPSL.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 > > >
RE: RADB - BGP routing
Does that mean registering with RADB guarantee 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
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 > > (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. > > > >
RE: RADB - BGP routing
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? -Original Message- From: Benny Leong (HTHK - Senior Engineer II - iServices Development, NNSD) [mailto:[EMAIL PROTECTED]] Sent: Thursday, September 28, 2000 2:19 AM To: 'Brian' Cc: '[EMAIL PROTECTED]'; 'Spolidoro, Guilherme' Subject: RE: RADB - BGP routing I have PI class C address applied from APNIC. Am I globally routable ? -- From: Brian [SMTP:[EMAIL PROTECTED]] Sent: Wednesday, September 27, 2000 9:25 PM To: Benny Leong (HTHK - Senior Engineer II - iServices Development, NNSD) Cc: '[EMAIL PROTECTED]'; 'Spolidoro, Guilherme' Subject: RE: RADB - BGP routing 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 > To: '[EMAIL PROTECTED]' > Subject: RE: RADB - BGP routing > > 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 > (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 ? > > **NOTE: New CCNA/CCDA List has been formed. For more information go >
RE: RADB - BGP routing
I have PI class C address applied from APNIC. Am I globally routable ?
--
From: Brian [SMTP:[EMAIL PROTECTED]]
Sent: Wednesday, September 27, 2000 9:25 PM
To: Benny Leong (HTHK - Senior Engineer II - iServices Development,
NNSD)
Cc: '[EMAIL PROTECTED]'; 'Spolidoro, Guilherme'
Subject: RE: RADB - BGP routing
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
> To: '[EMAIL PROTECTED]'
> Subject: RE: RADB - BGP routing
>
> 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
> (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
?
>
> **NOTE: New CCNA/CCDA List has been formed. For more
information go
> to
> http://www.groupstudy.com/list/Associates.html
> _
> UPDATED Posting Guidelines:
> http://www.groupstudy.com/list/guide.html
> FAQ, list archives, and subscription info:
http://www.groupstudy.com
> Report misconduct and Nondisclosure violations to
> [EMAIL PROTECTED]
>
> **NOTE: New CCNA/CCDA List has been formed. For more
information go
> to
> http://www.groupstudy.com/list/Associates.html
>
RE: RADB - BGP routing
I think that is their block for globally recognised address other than that
it is not globally recongisable.
Jason
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Benny Leong (HTHK - Senior Engineer II - iServices Development, NNSD)
Sent: Wednesday, September 27, 2000 12:15 PM
To: '[EMAIL PROTECTED]'; 'Spolidoro, Guilherme'
Subject: RE: RADB - BGP routing
>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.
--
From: Spolidoro, Guilherme [SMTP:[EMAIL PROTECTED]]
Sent: Monday, September 25, 2000 9:15 PM
To: '[EMAIL PROTECTED]'
Subject: RE: RADB - BGP routing
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
(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 ?
**NOTE: New CCNA/CCDA List has been formed. For more information go
to
http://www.groupstudy.com/list/Associates.html
_
UPDATED Posting Guidelines:
http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to
[EMAIL PROTECTED]
**NOTE: New CCNA/CCDA List has been formed. For more information go
to
http://www.groupstudy.com/list/Associates.html
_
UPDATED Posting Guidelines:
http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to
[EMAIL PROTECTED]
**NOTE: New CCNA/CCDA List has been formed. For more information go to
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_
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
**NOTE: New CCNA/CCDA List has been formed. For more information go to
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_
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Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: RADB - BGP routing
I think it means that ARIN will only give you a /20. But don't worry, I have a /23 and I am globally routable. MGR "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. > > -- > From: Spolidoro, Guilherme [SMTP:[EMAIL PROTECTED]] > Sent: Monday, September 25, 2000 9:15 PM > To: '[EMAIL PROTECTED]' > Subject: RE: RADB - BGP routing > > 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 > (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 ? > > **NOTE: New CCNA/CCDA List has been formed. For more information go > to > http://www.groupstudy.com/list/Associates.html > _ > UPDATED Posting Guidelines: > http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to > [EMAIL PROTECTED] > > **NOTE: New CCNA/CCDA List has been formed. For more information go > to > http://www.groupstudy.com/list/Associates.html > _ > UPDATED Posting Guidelines: > http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to > [EMAIL PROTECTED] > > **NOTE: New CCNA/CCDA List has been formed. For more information go to > http://www.groupstudy.com/list/Associates.html > _ > UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: RADB - BGP routing
The following is my understanding, please somebody correct me if I'm wrong.
It means that if you ask for a network on ARIN, the smaller block they will
give you today is a /20 = 16 classes C. In regards of "Smaller blocks
obtained directly from ARIN are the least likely to be globally routable": I
could be getting the picture completely wrong here, but I think they didn't
express themselves the best way. I guess they were trying to say that if you
receive a /20 and announce to the Internet as 16x/24 networks (instead of a
/20 CIDR block), some ISPs might block your advertisement, what makes sense.
The reason why ARIN assign those blocks instead of smaller ones is to reduce
the growth ratio of the BGP tables on the internet. So, it makes no sense if
they give a /20 to an ISP/company and this ISP/company advertise it on
smaller blocks to the internet.
Now, if you already own one or two classes C (/24) that were assigned to you
by ARIN years ago, I doubt that an ISP would block your advertisement.
Typically an ISP will put a filter /20 only for the blocks that were
assigned by ARIN on that fashion.
About 5 years ago, Sprint said to the Internet community that they wouldn't
accept anything smaller than /27 (I think was /27, not sure), unless if you
were a customers. At that time, Sprint was probably the largest ISP. After a
lot of people screaming, they decided not to do it (most likely because this
would affect the ability of their customers to reach other ISPs). Anyway, in
the real world today, I don't think any ISP will block /24 that were
assigned as /24 (not CIDR fashion).
Not sure if that helps.
Good luck.
-Original Message-
From: Benny Leong (HTHK - Senior Engineer II - iServices Development,
NNSD) [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 27, 2000 12:15 AM
To: '[EMAIL PROTECTED]'; 'Spolidoro, Guilherme'
Subject: RE: RADB - BGP routing
>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.
--
From: Spolidoro, Guilherme [SMTP:[EMAIL PROTECTED]]
Sent: Monday, September 25, 2000 9:15 PM
To: '[EMAIL PROTECTED]'
Subject: RE: RADB - BGP routing
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
(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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RE: RADB - BGP routing
>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.
--
From: Spolidoro, Guilherme [SMTP:[EMAIL PROTECTED]]
Sent: Monday, September 25, 2000 9:15 PM
To: '[EMAIL PROTECTED]'
Subject: RE: RADB - BGP routing
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
(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 ?
**NOTE: New CCNA/CCDA List has been formed. For more information go
to
http://www.groupstudy.com/list/Associates.html
_
UPDATED Posting Guidelines:
http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to
[EMAIL PROTECTED]
**NOTE: New CCNA/CCDA List has been formed. For more information go
to
http://www.groupstudy.com/list/Associates.html
_
UPDATED Posting Guidelines:
http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to
[EMAIL PROTECTED]
**NOTE: New CCNA/CCDA List has been formed. For more information go to
http://www.groupstudy.com/list/Associates.html
_
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Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: RADB - BGP routing
Have a look at http://www.isi.edu/ra/rps/training/tutorial/ Patrick [Charset iso-8859-1 unsupported, filtering to ASCII...] > 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 > (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 ? > > **NOTE: New CCNA/CCDA List has been formed. For more information go to > http://www.groupstudy.com/list/Associates.html > _ > UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > **NOTE: New CCNA/CCDA List has been formed. For more information go to > http://www.groupstudy.com/list/Associates.html > _ > UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: RADB - BGP routing
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 (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 ? **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: RADB - BGP routing
>What is the use of RADB ? Lots of things, both for the Internet community in general and to be able to use registry-based tools. See http://www.radb.net >Is it a must to register AS number and the route to the RADB ? It depends. RIPE requires it. I believe it's optional for ARIN, and I'm honestly not sure for APNIC. Wny not register it? **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: RADB - BGP routing
Check www.arin.net, you should be able to find some answers there. -- Kevin - Original Message - From: "Benny Leong (HTHK - Senior Engineer II - iServices Development, NNSD)" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, September 24, 2000 11:09 PM Subject: RADB - BGP routing > What is the use of RADB ? > Is it a must to register AS number and the route to the RADB ? > > **NOTE: New CCNA/CCDA List has been formed. For more information go to > http://www.groupstudy.com/list/Associates.html > _ > UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
