At 7:00 AM -0400 6/2/02, Nigel Taylor wrote: >All, > I was reading the old RIPE(22nd meeting minutes) and was wondering, >what >ever became of the BGP >proposal from Tony Bates and Enke Chen for the use of the Destination >Preference Attribute (DPA) for multi-homed sites.
DPA keeps coming up, at least for end-to-end route selection. Its basic problem is that only ISPs with whom you have an economic relationship have any motivation to respect it. Geoff Huston's NOPEER is a simpler way to accomplish the same thing (probably coupled with class of service request communities). >Based on our preivous thread with the known and unknown implications of >"inconsistant routes", I would think >this could've have been a step in the right direction. > >I did find a link where Enke Chen notes the use of the "LOCLA_PREF" attribute >by many providers, since the >lack of the DPA and rfc1998 also notes how the use of "communities" aid in >this process. You can really solve LOTS of operational issues with creative use of communities. While RFC2547 was one driver for creating an extended community attribute, there are various ideas floating around for other applications thereof. > >Anyone has any thoughts or suggestions on this as it applies to the use of >DPA >and where things stand on >global/ISP-based implementation of this attribute? As far as I know, it's never been implemented in operations. I'm reasonably certain that some versions of Bay RS could generate it, but I don't know of anyone that listens for it. -- "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=45622&t=45619 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
