Hi Jim, Some thoughts inline.
On Tue, 2002-12-03 at 02:16, Jim Devane wrote: > Hello all, > > Long time lurker, first time poster. > > I have a router that is multi-homed between 16631 and 701. > I have a new client who is buying transit from us. > They are multi-homed to us and 1239. > A business decision was made to policy route their traffic out 16631. Sound fair. Likely cheaper than 701 I expect. > As a result I will only publish 16631 routes to them. Can you elaborate on why you would do this? Also, do you send 0/0 to the customer? > However, if 16631 goes away, I want to be able to push the 701 routes to > them. Not sure why you are worried about sending both in the first place? Injecting a default wouldn't be very effective here since 1239 will most > likely have a more specific route! > So Conditional Adv to the rescue. However..I have a few questions I am > unsure about and I don't have a lab to try it out on. > > In this config: > > router bgp XXXX > nei New_Client remote-as Client_AS > nei New_Client filter-list 4 in > nei New_Client filter-list 3 out > > ip as path access-list 3 permit .* > ip as-path access-list 4 permit ^Client_AS$ > > so far so good.... > I want to add this... > > nei New_Client advertise-map MAP1 non-exist-map MAP2 > > route-map MAP1 permit 10 > match as-path 5 > route-map MAP2 permit 10 > match as-path 6 > > ip as-path access-list 5 ^$ _16631_ > ip as-path access-list 6 ^$ _701_ > > > SO NOW THE QUESTIONS!!! > > 1) What is the order of operation for the advertisement out? Will the > Filter-list showing all routes cancel any effect of the route-map? > 2) Are the MAP1 and MAP2 route maps valid in this config because they use > as-path? The config's I could find as example were based on Prefix. I made > up the part about using the as-path, but it seems logical (boy, I wish I had > a couple extra routers!) > 3) Is there a better way to go about this! > > Thanks in advance. And thanks to everybody who posts. I have taken away a > lot from this mailing-list! > > Jim Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=58443&t=58428 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
