Operational Issues with 69.0.0.0/8...
Todd A. Blank
todd at ipoutlet.com
Tue Dec 3 22:14:57 UTC 2002
Some of this is beginning to clear up. The Cable and Wireless stuff
seems to be working now.
Still, when we source from the 69.0.0.0/8 CIDR, traffic can't go (http)
to the following destinations:
www.ocas.com
www.lavalife.com
www.indofilms.com
The first two are on AT&T and AT&T Canada. The last one is on
allegiance internet.
Any insight would be much appreciated. We are sure this is affecting
access to other destinations when using 69.0.0.0/8 as a source - we just
haven't found them all yet...
Thanks,
Todd A. Blank
614.207.5853
-----Original Message-----
From: Martin J. Levy [mailto:mahtin at mahtin.com]
Sent: Monday, December 02, 2002 2:17 PM
To: Todd A. Blank; jfeger at feger.net
Cc: nanog at merit.edu
Subject: Re: Operational Issues with 69.0.0.0/8...
Todd,
If this helps. Do something like the following...
telnet route-views.oregon-ix.net > /tmp/file
term len 0
sh ip bgp 69.0.0.0 255.0.0.0 l
quit
cut -c62-2000 < /tmp/file | awk '{print $1}' | sort -n | uniq -c
| more
...your commands will vary.
You will see plenty of routes within 69/8.
A closer look with show that around 121 routes are seen in the 69/8
range via most of the feeds into Oregon. There is one big exception...
69.4.64.0/20
... it shows up via AS-2548 (Digex) and the other feeds, but it's the
only route within 69/8 that shows up via AS-2548. This is valuable
information.
It does not mean there is filtering within AS-2548, but I would
recommend you contact them to further this investigation.
BTW: This is exactly what Oregon is great for! It shows up issues like
this with ease. Thanks!
Martin
---------------------------
At 01:47 PM 12/2/2002 -0500, Todd A. Blank wrote:
>Thanks for the reply, James.
>
>I wish I could tell you the answer. We see traffic passing through
some
>of the routers (transit), but on each network, or their downstreams
>there seem to be different devices filtering. Sometimes it is a border
>or peering router. In other cases, it has been access devices, such as
>firewalls.
>
>One we resolved this morning (with some help from the good folks at
>ARIN) was a downstream provider from one of these transit providers
that
>was filtering in their devices as well.
>
>I am just trying to raise general awareness that the 69.0.0.0/8 block
is
>assigned and out there in use, and to get people to re-examine their
>filters, access lists, etc.
>
>You help and response is appreciated.
>
>Sincerely,
>
>Todd A. Blank
>614.207.5853
>
>-----Original Message-----
>From: Feger, James [mailto:jfeger at feger.net]
>Sent: Monday, December 02, 2002 1:35 PM
>To: Todd A. Blank
>Subject: Re: Operational Issues with 69.0.0.0/8...
>
>When you say 'Networks involved' do you mean those providers are
>blocking
>the traffic, or you see these networks in the transit?
>
>Thanks,
>James
>
>
>On Mon, 2 Dec 2002, Todd A. Blank wrote:
>
>>
>> To all concerned:
>>
>> We have been assigned a CIDR of 69.1.192.0/19.
>>
>> We have had numerous problems getting traffic through to various
>destinations.
>>
>> We are finding that many routers are still filtering 69.0.0.0/8.
>>
>> This block used to be restricted, but was assigned by IANA to ARIN in
>August of 2002.
>>
>> If anyone is still filtering this block in their routers, please
>remove the filters!
>>
>> Here are some of the destinations that are not reachable if your
>source is anywhere in the 69.0.0.0/8 CIDR:
>>
>> www.cplink2.com
>> www.ocas.com
>> www.indofilms.com
>> www.lavalife.com
>>
>>
>> Some of the Networks involved are Cable and Wireless, Allegiance
>Internet and AT&T.
>>
>> Thank you,
>>
>> Todd A. Blank
>> IPOutlet LLC
>> 614.207.5853
>>
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