""Howard C. Berkowitz"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > At 12:30 AM -0400 5/12/02, Erwin wrote: > >Suppose we are the ISP having 3 different AS connected to users for > >multihoming. If it is requested that the users prefer a particular path, say > >from AS1, instead of from AS2 or AS3. What is the best way to apply the > >configuration? Is it using BGP path selection process criteria, then we > >apply weight or Local Preference, or we use the policy for controlling > >inbound traffic by configuring MED or AS PATH? > > > >Thanks in advance > > I'd need to know a lot more about what problem you are trying to > solve. Are AS1-3 all internal to you, or are some of them your > upstreams? It's highly unlikely that an ISP could get three > registered AS, but you could use private ASNs.
In case anyone is interested, AS-1 is registered to Genuity ( formerly GTE ), AS-2 is registered to ACES Research out of Phoenix AZ, whcih in turn was sold to RMI Net of Denver a couple of years ago, and AS-3 is registered to MIT. For some reason I kinda doubt this person is connected through all three of these. So he is probably using these numbers for simplicity sake. ( I would hope ) Idle curiousity - in cases like AS 2, if the buying ISP already has an AS number, do they get to keep the one acquired in the purchase? Or does ARIN require that to be relinquished? Probably not, meaning that worlCom must have about a dozen AS numbers, but you never can tell. > > Do the users have ASNs of their own? Do any multihome to other > providers? Is their address space provider-assigned? If so, by you > or another ISP? > > Why do you want different paths? Traffic management? Controlling the > exit to your upstreams? > -- > "What Problem are you trying to solve?" > ***send Cisco questions to the list, so all can benefit -- not > directly to me*** > **************************************************************************** **** > Howard C. Berkowitz [EMAIL PROTECTED] > Chief Technology Officer, GettLab/Gett Communications http://www.gettlabs.com > Technical Director, CertificationZone.com http://www.certificationzone.com > "retired" Certified Cisco Systems Instructor (CID) #93005 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43977&t=43962 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
