[64062] in North American Network Operators' Group
Re: Pitfalls of annoucing /24s
daemon@ATHENA.MIT.EDU (Phil Rosenthal)
Wed Oct 15 16:49:57 2003
In-Reply-To: <026b01c3935c$aae49fd0$3119d797@JPALMERWIN2K>
Cc: <nanog@merit.edu>
From: Phil Rosenthal <pr@isprime.com>
Date: Wed, 15 Oct 2003 16:46:50 -0400
To: "John Palmer" <nanog@adns.net>
Errors-To: owner-nanog-outgoing@merit.edu
http://info.us.bb.verio.net/routing.html#PeerFilter
That's how Verio does it, and I assume, that's how most people who
filter by length do it as well.
--Phil
On Oct 15, 2003, at 4:40 PM, John Palmer wrote:
>
> Good question.
>
> You know there are thousands of legacy /24's out there that were
> allocated by
> IANA as /24's How can you aggregate them up if all you have is the /24?
>
> To those who filter out /24's - how is this done - just by the netmask
> size?
>
> ----- Original Message -----
> From: "Jean-Christophe Smith" <jsmith@vitalstream.com>
> To: <nanog@merit.edu>
> Sent: Wednesday, October 15, 2003 15:34
> Subject: Pitfalls of annoucing /24s
>
>
>>
>>
>> In current practice would there be serious jeopardy of portions of the
>> internet not being able to reach this address space due to bgp
>> filters or
>> other restrictions? What is the smallest acceptable block of IPs that
>> can be
>> announced without adverse or unpredictable results? Verio would most
>> likely
>> be picking up these routes from us. I don't want to cause a religious
>> debate, but I am interested in what the industry consensus is.
>>
>> I'm just doing some research, any comments would be appreciated.
>>
>> Thanks,
>> Jean-Christophe Smith
>>
>>
>
>
--Phil Rosenthal
ISPrime, Inc.
