Hi,
let's assume that there is an ISP "A" operating in Europe region who
has /19 IPv4 allocation from RIPE. From this /19 they have leased /24
to ISP "B" who is multi-homed. This means that ISP "B" would like to
announce this /24 prefix to ISP "A" and also to ISP "C". AFAIK this
gives two possibil
:
>>>
>>>
>>>
>>> Option 3?
>>>
>>> ISP A announces the /19 and the /24 while ISP B does just the /24
>>>
>>>> On 9/27/2016 4:20 AM, Martin T wrote:
>>>> Hi,
>>>>
>>>> let's assume that the
eeded.
However, I would like to hear from Roy and Mel why do they prefer a
third option where ISP A announces the /19 and the /24 while ISP B
does just the /24.
thanks,
Martin
On Wed, Oct 5, 2016 at 11:50 PM, Florian Weimer wrote:
> * Martin T.:
>
>> Florian:
>>
>>> Are the au
Hi,
I made a drawing of those two best solutions: http://i.imgur.com/7NQVgUH.png
As much as I understand, both solutions require no special changes
from "ISP C". Only advantage of solution B over solution A, that I can
see, is that at the time when link between "ISP C" and "ISP B" is up,
the traf
Thank you all for the replies! I'll go with the solution where "ISP A"
announces both /19 prefix and /24 prefix.
Martin
On Thu, Oct 20, 2016 at 1:16 AM, Matt Buford wrote:
> On Mon, Oct 10, 2016 at 2:44 PM, Baldur Norddahl
> wrote:
>
>
>> Is that a real problem? In my experience a /24 is honou
Hi!
For testing a script I generated 1 random IPv4 and global unicast
IPv6 addresses. For all those addresses I tried to find the
netname/name attribute value from WHOIS servers using the latest
version of https://github.com/rfc1036/whois and RDAP servers using the
curl. Basically 'whois -H '
Hi,
how to associate AS number with company name in ARIN region? For
example in a small European country, where I leave, it can be done
roughly like that:
1) ISP named "XYZ" and IP transit customer named "KLM Inc." sign an IP
transit contract
2) IP transit customer "KLM Inc." tells to ISP that th
Thanks for replies! Who is allowed to change "OrgName" attribute
value? Only ARIN?
thanks,
Martin
On Fri, Mar 31, 2017 at 11:59 AM, Florian Weimer wrote:
> * Arnold Nipper:
>
>> On 30.03.2017 17:50, Martin T wrote:
>>
>>> Is it possible to make a sim
Hi,
for example there is a small company with /22 IPv4 allocation from
RIPE in European region. This company is dual-homed and would like to
announce 4x /24 prefixes to both ISPs. Both ISP's update their
prefix-lists automatically based on records in RIPE database. For
example Level3 uses this pra
then reject;
}
}
PS: this is a theoretical question :) I'm also for keeping the BGP table as
short as possible.
regards,
Martin
On Thu, Jan 30, 2014 at 5:13 PM, Tore Anderson wrote:
> * Job Snijders
>
> > On Thu, Jan 30, 2014 at 06:51:59PM +0200, Martin T wrot
Hi,
if I make a traceroute to a host in San Jose in Level3 network from
DigitalOcean server in Amsterdam, then in Level3 network(hop 6 in
example below) the RTT remains the same:
# traceroute -q 1 -I ZYNGA-INC.edge1.SanJose3.Level3.net
traceroute to ZYNGA-INC.edge1.SanJose3.Level3.net (4.53.208.1
Hi,
bit weird question, but is it possible to determine
relationship(Internet transit, settlement-free peering, etc) between
the operators based on import and export statements in aut-num object?
Often aut-num objects in RIR database contain the remarks which
describe such relationships. However,
tools like RIPEstat
BGPlay?
thanks,
Martin
On 11/25/14, William Waites wrote:
> On Tue, 25 Nov 2014 17:36:47 +0200, Martin T said:
>
> > Last but not least, maybe there is altogether a more reliable
> > way to understand the relationship between the operators than
>
Hi,
volume-based DDoS attacks should often result with following bandwidth graphs:
http://s12.postimg.org/gy3eps10t/volume_based_DDo_S_graph.png
This is a fabricated bps graph for 100GigE port facing an uplink
provider. As seen on the image, outgoing traffic drops at the time
when incoming traf
Hi,
as around 40% of ASNs allow at least partial IPv4 address spoofing in
their network(http://spoofer.csail.mit.edu/summary.php) and there are
around 30 million open-resolvers(http://openresolverproject.org/) in
the Internet, then DNS amplification traffic is daily occasion for
ISPs. This in prob
Hi,
am I correct that ISPs (in RIPE region), who update their BGP prefix
filters automatically, ask their IP transit customer or peering
partner to provide their "route"/"route6" object(s) or "as-set" object
in order to find all the prefixes which they should accept? If the IP
transit customer or
trouble with those addresses.
thanks,
Martin
On Tue, Apr 28, 2015 at 4:23 PM, Martin T wrote:
> Colin,
>
> this is a good idea, but in this case the network I am interested in
> does not have a RIPE Atlas probe.
>
>
> regards,
> Martin
>
> On 4/28/15, Colin Johns
Hi,
I watched "Citizenfour"(imdb.com/title/tt4044364/) documentary and at
41:12 Edward Snowden gives a brief overview of some of the leaked
documents to journalists Glenn Greenwald and Ewen MacAskill. At 42:57
Snowden mentions devices which are able to collect data at rate of
1Tbps. This was in 20
tly from
> multiple wavelengths or grey light simultaneously.
>
> Jason Bothe, Manager of Networking
>
> Rice University
>
>
> o +1 713 348 5500
>
> m +1 713 703 3552
>
> ja...@rice.edu
>
>
> On Mar 21, 2015, at 21:05, Martin T wrote:
>
&g
of IP address? If yes, then is there
an API to check if an address is allowed to use Google, Facebook, etc
services or not?
thanks,
Martin
On 9/17/13, Martin T wrote:
> Hi,
>
> when one end-customer has been using for example /24 IPv4 allocation
> for a while and returns this
Colin,
this is a good idea, but in this case the network I am interested in
does not have a RIPE Atlas probe.
regards,
Martin
On 4/28/15, Colin Johnston wrote:
>
>
>
>> On 28 Apr 2015, at 10:32, Martin T wrote:
>>
>> Hi,
>>
>> as far as I know
Hi,
what are the disadvantages of peering(announcing own and all customers
prefixes) with own IP transit customers? One disadvantage is obviously
that amount of traffic on IP transit link is lower and thus customer
pays for smaller amount of Mbps. On the other hand, this can be
somewhat compensate
Hi,
let's say that I need to build an ACL where I block all the IPv4
traffic from Sweden. I considered following solutions:
1) RIR statistics
files(ftp://ftp.ripe.net/ripe/stats/RIR-Statistics-Exchange-Format.txt)
accessible for example at ftp://ftp.apnic.net/pub/stats/. However,
those files cont
John,
> At a brute force country level it is possible to use the Delegated
> ranges lists but that runs into the problem where IP ranges are
> subnetted and allocated to other countries.
Yeah.
In addition, to illustrate the point in my initial post, sometimes
inetnum objects contain more than on
Hi,
there are various tools out there which show the prefix distribution
among the peers/uplinks for given ASN. For example
https://radar.qrator.net/as/graph#96311 or
http://bgp.he.net/AS#_asinfo. As far as I know, those tools build
the graphs mainly based on data from route servers. Am I
Thanks for confirming this! One last question- am I correct that those
graphs referred in my initial e-mail indicate announced prefixes? Only
way to have some insight about received prefixes for particular ASN is
to check the RIR database aut-num object and hope that this is
up-to-date and all the
Hi,
as I understand, ARIN whois database does not contain "route" objects,
which are used for example in RIPE region for automatic BGP prefix
filter generation. How does this work in ARIN region? I know that at
least some ISP's operating in ARIN region use their own whois
databases(for example rr.
uldn't most ISP's
in RIPE region use radb or their own whois database which mirrors all major
IRR databases and thus rr.arin.net among the others?
regards,
Martin
2013/6/12 Joe Abley
>
> On 2013-06-12, at 13:38, Martin T wrote:
>
> > as I understand, ARIN whois databas
Hi,
as probably many of you know, it's possible to create a route object
to RIPE database for an address space which is allocated outside the
RIPE region using the RIPE-NCC-RPSL-MNT maintainer object. For example
an address space is from APNIC or ARIN region and AS is from RIPE
region. However, wh
Hi,
as probably many of you know, it's possible to create a "route" object
to RIPE database for an address space which is allocated outside the
RIPE region using the RIPE-NCC-RPSL-MNT maintainer object. For example
an address space is from APNIC or ARIN region and AS is from RIPE
region. For examp
t; I think most of the folks on the list can attest to that. :-)
>
> - ferg
>
>
> On Wed, Aug 7, 2013 at 1:20 AM, Martin T wrote:
>
>> Hi,
>>
>> as probably many of you know, it's possible to create a "route" object
>> to RIPE database for an
Saku,
> In most cases upstream does not do any automatic prefix filter generation,
> it's maybe somewhat popular in mid-sized european shops but generally not too
> common.
What do you mean? In most cases upstreams do not filter prefixes at all?
> There is active on-going work to secure BGP
Hi,
many Internet exchange points post publicly available graphs which
describe aggregated traffic volumes on IX. For example:
Netnod: http://www.netnod.se/ix-stats/sums/
AMS-IX: https://www.ams-ix.net/technical/statistics
LINX: https://www.linx.net/pubtools/trafficstats.html
Is there a common
Hi,
when one end-customer has been using for example /24 IPv4 allocation
for a while and returns this(for example changes an ISP) to LIR, then
are there some good practices before handing out this same /24 to a
new customer? I guess LIR should:
1) remove all the DNS PTR records, classless of clas
Thanks for all the replies!
Nick,
counting traffic on inter-switch links is kind of cheating, isn't it?
I mean if "input bytes" and "output bytes" on all the ports facing the
IX members are already counted, then counting traffic on links between
the switches in fabric will count some of the traf
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