From: Liban.Mohamed@mail.sprint.com
Date: Sun Mar 02 2003 - 11:34:13 GMT-3
Most ISP will accept /24. so you should be fine. The only ISP that I
know that wants /20 is Verio
Liban Mohamed
IP Engineer
Sprintlink
www.sprint.net
-----Original Message-----
From: anthonypace [mailto:anthonypace@fastmail.fm]
Sent: Saturday, March 01, 2003 3:08 PM
To: ccielab
Subject: Best practices with BGP and smallest CIDR block advertisement
I am helping a friend who is developing an appliance to dynamically load
balance BGP outbound advertisments using "the old PREPEND the AS-PATH on
some networks going to one provider, and vice-versa going to the other".
The "special" part is they will adjust this periodically based on a
number of factors (load, latency etc...)
I remember a year or two ago there were alot of problems in breaking up
advertisments into blocks of less than /20. Some major providor(s) were
dropping the routes and customers were getting "black holed".
DOES ANYONE KNOW THE SMALLEST BLOCKS WHICH ARE PRACTICAL WHEN
ADVERTISING
TO UPSTREAM PROVIDERS?
Halabi's book has alot of examples with /24 networks being advertised,
but I am thinking it is just used as an example to conceptualize the
concepts.
Any help would be greatly appriciated.
Anthony Pace CCIE #10349
-- Anthony Pace anthonypace@fastmail.fm-- http://www.fastmail.fm - A fast, anti-spam email service.
This archive was generated by hypermail 2.1.4 : Sat Apr 05 2003 - 08:51:30 GMT-3