nanog mailing list archives
Re: Pitfalls of annoucing /24s
From: Sean Donelan <sean () donelan com>
Date: Wed, 15 Oct 2003 17:34:53 -0400 (EDT)
On Wed, 15 Oct 2003, Jean-Christophe Smith wrote:
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?
The longest CIDR block that all ISPs accept is a /8. Anything longer than a /8 runs into some policy at some ISP. There are many rules of thumb about what is acceptable to a wide range of ISPs. Generally if you follow the number registry policies, and announce the block delegated directly from the registry most providers will accept it. Different address ranges have different historical CIDR lengths.
Current thread:
- Pitfalls of annoucing /24s Jean-Christophe Smith (Oct 15)
- Re: Pitfalls of annoucing /24s John Palmer (Oct 15)
- Re: Pitfalls of annoucing /24s Phil Rosenthal (Oct 15)
- Re: Pitfalls of annoucing /24s Matt Levine (Oct 15)
- Re: Pitfalls of annoucing /24s Andrew - Supernews (Oct 15)
- Re: Pitfalls of annoucing /24s Phil Rosenthal (Oct 15)
- Re: Pitfalls of annoucing /24s Sean Donelan (Oct 15)
- <Possible follow-ups>
- RE: Pitfalls of annoucing /24s Jean-Christophe Smith (Oct 15)
- RE: Pitfalls of annoucing /24s william (Oct 15)
- RE: Pitfalls of annoucing /24s William Caban (Oct 15)
- RE: Pitfalls of annoucing /24s H. Michael Smith, Jr. (Oct 15)
- Re: Pitfalls of annoucing /24s Phil Rosenthal (Oct 15)
- Re: Pitfalls of annoucing /24s Andy Ellifson (Oct 15)
- Re: Pitfalls of annoucing /24s K. Scott Bethke (Oct 15)
- Re: Pitfalls of annoucing /24s Phil Rosenthal (Oct 15)
- Re: Pitfalls of annoucing /24s John Palmer (Oct 15)
- RE: Pitfalls of annoucing /24s Forrest (Oct 15)
- RE: Pitfalls of annoucing /24s H. Michael Smith, Jr. (Oct 15)
- RE: Pitfalls of annoucing /24s H. Michael Smith, Jr. (Oct 15)