Since this old thread recently became alive (momentarily), and I read
through the posts, (perhaps, again!) ...
Patrick, I would like to understand why you said that routers handling 10G
traffic in DFZ are not bothered (much) by a few extra prefixes? Isn't this
counter-intuitive? For example, for t
On Tue, 21 Jul 2009 14:55:24 +0800
Kanagaraj wrote:
> Basically /24s are the longest prefix size accepted by providers
> unless you are dealing RTBH (triggered blackholing services). Another
> requirement to ensure acceptance of an IP block, especially smaller
> assignments are equivalent route o
: lion...@samsung.com
> Tel +82 70 7015 0623, Mobile +82 17 520 9193
> Fax +82 70 7016 0031
> =
>
> --- Original Message ---
> Sender : Danny McPherson
> Date : 2008-12-21 02:42 (GMT+09:00)
> Title : Re: What is the most standard subnet length on internet
From: Jon Lewis [mailto:jle...@lewis.org]
Sent: Monday, December 22, 2008 8:12 PM
To: Seth Mattinen
Cc: NANOG list
Subject: Re: What is the most standard subnet length on internet
On Mon, 22 Dec 2008, Seth Mattinen wrote:
> Anyone running a platform that can't take a full table would apply
On Tue, Dec 23, 2008 at 08:25:40AM -0600, Alex H. Ryu wrote:
> Also one of the reason why not putting default route may be because of
> recursive lookup from routing table.
> If you have multi-homed site within your network with static route, and
> if you use next-hop IP address instead of named in
aldis.kletni...@vt.edu; Nathan Ward
>Cc: nanog list
>Subject: RE: What is the most standard subnet length on internet
>
>Snarky replies aside, it might be interesting to hear if there are any
>real examples of this being done intentionally and not out of not
>knowing better or oth
Also one of the reason why not putting default route may be because of
recursive lookup from routing table.
If you have multi-homed site within your network with static route, and
if you use next-hop IP address instead of named interface, you will see
the problem when you have default route in rout
Nathan Ward wrote:
Let me rephrase; Are there people who are filtering /24s received from
eBGP peers who do not have a default route?
of course.
Curiously, it was really meant as a rhetorical question where the answer
was "no".
Why are people doing this? Are they lacking clue, or, is there
On 23/12/2008, at 6:40 PM, Church, Charles wrote:
I help a buddy who works for a small ISP. I believe they're
ignoring or
null routing large chunks of APNIC. Their customers are aware of the
policy, and cool with it. Port scanning and other malicious stuff
dropped 50% afterwards.
That sor
:skyw...@valhallalegends.com]
Sent: Monday, December 22, 2008 10:08 PM
To: valdis.kletni...@vt.edu; Nathan Ward
Cc: nanog list
Subject: RE: What is the most standard subnet length on internet
Snarky replies aside, it might be interesting to hear if there are any
real examples of this being
On Tue, Dec 23, 2008 at 02:08:25PM +1300, Nathan Ward wrote:
> On 23/12/2008, at 1:31 PM, Seth Mattinen wrote:
> >Anyone running a platform that can't take a full table would apply
> >such a filter to weed out anyone who likes to announce all of their
> >space as /24's for "traffic engineering"
s speaking of someone
doing this filtering on a one-off basis and not on all /24's in the DFZ.
- S
-Original Message-
From: valdis.kletni...@vt.edu [mailto:valdis.kletni...@vt.edu]
Sent: Monday, December 22, 2008 10:05 PM
To: Nathan Ward
Cc: nanog list
Subject: Re: What is the most
On Tue, 23 Dec 2008 14:44:46 +1300, Nathan Ward said:
> Why are people doing this? Are they lacking clue, or, is there some
> reasonable purpose?
The total number of routing cluons is apparently a fixed quantity. The number
of AS's is known to be increasing. Do the math.
pgpgjsmzfULU0.pgp
D
From: Nathan Ward
Sent: Monday, December 22, 2008 19:45
To: nanog list
Subject: Re: What is the most standard subnet length on internet
On 23/12/2008, at 2:39 PM, Joe Provo wrote:
> On Tue, Dec 23, 2008 at 02:34:39PM +1300, Nathan Ward wrote:
> [snip]
>> Let me rephrase; Are there
5:45 PM
>To: nanog list
>Subject: Re: What is the most standard subnet length on internet
>
>On 23/12/2008, at 2:39 PM, Joe Provo wrote:
>
>> On Tue, Dec 23, 2008 at 02:34:39PM +1300, Nathan Ward wrote:
>> [snip]
>>> Let me rephrase; Are there people who are filte
lion...@samsung.com
Tel +82 70 7015 0623, Mobile +82 17 520 9193
Fax +82 70 7016 0031
=
--- Original Message ---
Sender : Nathan Ward
Date : 2008-12-23 10:44 (GMT+09:00)
Title : Re: What is the most standard subnet length on internet
On 23/12
On 23/12/2008, at 2:39 PM, Joe Provo wrote:
On Tue, Dec 23, 2008 at 02:34:39PM +1300, Nathan Ward wrote:
[snip]
Let me rephrase; Are there people who are filtering /24s received
from
eBGP peers who do not have a default route?
of course.
Curiously, it was really meant as a rhetorical que
On Tue, Dec 23, 2008 at 02:34:39PM +1300, Nathan Ward wrote:
[snip]
> Let me rephrase; Are there people who are filtering /24s received from
> eBGP peers who do not have a default route?
of course.
--
RSUC / GweepNet / Spunk / FnB / Usenix / SAGE
On 23/12/2008, at 2:24 PM, Seth Mattinen wrote:
Nathan Ward wrote:
On 23/12/2008, at 1:31 PM, Seth Mattinen wrote:
Anyone running a platform that can't take a full table would apply
such a filter to weed out anyone who likes to announce all of
their space as /24's for "traffic engineering".
On Tue, 23 Dec 2008 14:08:25 +1300, Nathan Ward said:
> People are filtering /24s without a 0/0 route?
Hell - people have been known to filter entire /8's and fail to notice
the resulting damage. See the bogon filters for 69/8, then 70/8, then...
pgpmCG4KKCxGb.pgp
Description: PGP signature
Nathan Ward wrote:
On 23/12/2008, at 1:31 PM, Seth Mattinen wrote:
Anyone running a platform that can't take a full table would apply
such a filter to weed out anyone who likes to announce all of their
space as /24's for "traffic engineering". If one does that and doesn't
announce the aggregat
On Mon, 22 Dec 2008, Seth Mattinen wrote:
Anyone running a platform that can't take a full table would apply such a
filter to weed out anyone who likes to announce all of their space as /24's
for "traffic engineering". If one does that and doesn't announce the
aggregate as well, one could find
On 23/12/2008, at 1:31 PM, Seth Mattinen wrote:
Anyone running a platform that can't take a full table would apply
such a filter to weed out anyone who likes to announce all of their
space as /24's for "traffic engineering". If one does that and
doesn't announce the aggregate as well, one co
정치영 wrote:
Hi all,
I appreciate many people gave me advices,
Some of persons asked me about my questions, I'm sorry for that I couldn't
reply to everyone.
Because of your help, I could get many opinions and standards regarding IP
allocation policy.
by the way, in APNIC's IP allocation sizes
Message ---
Sender : Danny McPherson
Date : 2008-12-21 02:42 (GMT+09:00)
Title : Re: What is the most standard subnet length on internet
On Dec 18, 2008, at 9:43 PM, 정치영 wrote:
> Suresh,
>
> Yes, I guess my concern is close to the second meaning.
>
> It seems so simple. Currently
On Dec 18, 2008, at 9:43 PM, 정치영 wrote:
Suresh,
Yes, I guess my concern is close to the second meaning.
It seems so simple. Currently annoucement of /24 seems to be okey,
most upstream providers accept this.
However I wonder if there is any ground rule based on any standard
or official re
Oh, and before anyone jumps all over me, I am NOT implying you should
deaggregate and blow up the table. Just that 300K prefixes is the DFZ is
not a reason to start filtering /24s. Today. :)
given
o ipv4 bits not scaling to internet growth
o increase in multi-homing
o internet growth
nats
On Dec 19, 2008, at 10:48 AM, Joe Greco wrote:
As for routing table size, no router which can handle 10s of Gbps is
at all bothered by the size of the global table,
... as long as it isn't something like a Cisco Catalyst 6509 with
SUP720
and doesn't have a PFC3BXL helping out ...
... or if
On Dec 19, 2008, at 10:53 AM, Joe Abley wrote:
It'd be nice if some grad student somewhere with friends in the
operations community was to experiment with /24s carved out of
larger blocks from all over the planet and present some empirical
data.
We don't need a student. We have actual ne
[cf http://www.merit.edu/mail.archives/nanog/msg12684.html and
related past threads]
On Fri, Dec 19, 2008 at 10:53:48AM -0500, Joe Abley wrote:
[snip]
> More likely that someone would filter based on the longest assignment
> made in a particular /8 (e.g. in 202/7, 199/8 we might expect to see /
On 2008-12-19, at 00:27, Suresh Ramasubramanian wrote:
Even if a longer prefix like a /24 is announced, chances of people
accepting it is slim. Especially, as you say, if the RIR allocation
is something larger than /24
I think in practice that's over-stating the problem.
If an RIR assigns
> As for routing table size, no router which can handle 10s of Gbps is
> at all bothered by the size of the global table,
... as long as it isn't something like a Cisco Catalyst 6509 with SUP720
and doesn't have a PFC3BXL helping out ...
... or if we conveniently don't classify a Catalyst 65x
Email: lion...@samsung.com
> Tel +82 70 7015 0623, Mobile +82 17 520 9193
> Fax +82 70 7016 0031
> =
>
> --- Original Message -------
> Sender : Á¤Ä¡¿µ °úÀå/±â¼ú1ÆÀ/»ï¼º³×Æ®¿÷½º
> Date : 2008-12-19 13:43 (GMT+09:00)
> Title : Re: Re: What is
Even if a longer prefix like a /24 is announced, chances of people
accepting it is slim. Especially, as you say, if the RIR allocation
is something larger than /24
And I have a feeling acceptance /24 route announcements of anything
other than legacy classful space, infrastructure space like the
On Dec 19, 2008, at 12:27 AM, Suresh Ramasubramanian wrote:
Even if a longer prefix like a /24 is announced, chances of people
accepting it is slim. Especially, as you say, if the RIR allocation
is something larger than /24
And I have a feeling acceptance /24 route announcements of anything
o
On 19 Dec 2008, at 04:43, 정치영 wrote:
It seems so simple. Currently annoucement of /24 seems to be okey,
most upstream providers accept this.
However I wonder if there is any ground rule based on any standard
or official recommandation.
The only rule is "my network, my rules" ;-)
But if ge
On Fri, Dec 19, 2008 at 02:40:47AM +, l l9l wrote:
> However, what I am really wondering is what is the most standard subnet
> length that always can be guaranteed through Internet. less than /24 bit ?
>
while one can get away w/ /24s (if that is all one has) for many places,
Even if a longer prefix like a /24 is announced, chances of people
accepting it is slim. Especially, as you say, if the RIR allocation
is something larger than /24
And I have a feeling acceptance /24 route announcements of anything
other than legacy classful space, infrastructure space like the
]
Sent: Thursday, December 18, 2008 20:44
To: Suresh Ramasubramanian
Cc: nanog@nanog.org
Subject: Re: Re: What is the most standard subnet length on internet
Suresh,
Yes, I guess my concern is close to the second meaning.
It seems so simple. Currently annoucement of /24 seems to be okey, most
-
Sender : 정치영 과장/기술1팀/삼성네트웍스
Date : 2008-12-19 13:43 (GMT+09:00)
Title : Re: Re: What is the most standard subnet length on internet
Suresh,
Yes, I guess my concern is close to the second meaning.
It seems so simple. Currently annoucement of /24 seems to be okey, most
upstream providers
esh Ramasubramanian
Date : 2008-12-19 12:37 (GMT+09:00)
Title : Re: What is the most standard subnet length on internet
Chi Young, let me clarify one thing here ..
Do you mean IP allocation as in subnet allocation, swipping in apnic
or through a rwhois server etc?
Or do you mean "what is t
Chi Young, let me clarify one thing here ..
Do you mean IP allocation as in subnet allocation, swipping in apnic
or through a rwhois server etc?
Or do you mean "what is the minimum subnet size I can announce on the
internet and have other providers not drop it on the floor"?
srs
On Fri, Dec 19,
On Dec 18, 2008, at 9:40 PM, 정치영 wrote:
Hi everyone,
I'm going to rebuild IP allocation policy of my company and I am
looking for some standard reference for my policy.
I have already studied some standard like RFC1518, RIPE181, RFC2050
and I got it is very important to maintain hierachy s
Chiyong,
Check out:
http://bgp.potaroo.net/bgprpts/rva-index.html
Since you are on nanog, you probably get the CIDR-REPORT every Friday but if
not, go surf around at http://www.cidr-report.org
Cheers,
Mike
On Thu, Dec 18, 2008 at 6:40 PM, 정치영 wrote:
> Hi everyone,
>
> I'm going to rebuild I
On 08.12.19 11:40, 정치영 wrote:
> what is the most standard subnet length that always can be
> guaranteed through Internet. less than /24 bit ?
nothing can always be guaranteed in life or the internet.
but /24s do seem to be fairly widely used. so they probably work for
the folk announcing them.
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