Pitfalls of annoucing /24s

Wed Oct 15 20:40:40 UTC 2003

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 at vitalstream.com>
To: <nanog at 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
> 
> 