yes, confederation will appear as one unified AS to external peers w/o you having to specify remove private-as. yes, the remove private-as option will only remove private-as's up to the 1st non-private as...remove private-as is used to remove private as from as path for outbound announements - think service provider advertising aggregate route for clients, clients advertising more specific routes to service provider, the service provider will strip the private as before advertising aggregate routes to other providers. -d
On Mon, Jul 25, 2011 at 3:17 PM, Aaron Moreck <[email protected]> wrote: > Is my understanding correct as i outlined in the 2 bullet points? > Also the remove-private-as is for out going updates correct? > > On Mon, Jul 25, 2011 at 1:37 PM, Dwann Hall <[email protected]> wrote: >> >> ISP supporting colo environments via eBGP w/ private AS would be a >> good place to use the remove-private-as. -d >> >> On Mon, Jul 25, 2011 at 1:12 PM, Aaron Moreck <[email protected]> wrote: >> > I am struggling to see the the use of this command. Here is my >> > understanding, please correct me if I am wrong >> > >> > 1.) When you use confederations, the Sub AS's are removed from the AS >> > path when advertising to eBGP peers. If Sub AS's are private then they >> > wont >> > be seen by the eBGP neighbor by default. >> > 2.) The "remove-private-as" does not remove the private AS if there >> > are >> > non-private AS's already in the AS Path. For example if the AS Path >> > was >> > (123 7018 65055) and 65055 was the AS of the router advertising to >> > EBGP >> > with the remove-private-as option, it would NOT remove the 65055 >> > because of >> > the 123 and 7018 present in the AS PATH. >> > >> > So my question is in what circumstance would the remove-private-as be >> > useful? >> > >> > Thanks >> > >> > Aaron >> > _______________________________________________ >> > For more information regarding industry leading CCIE Lab training, >> > please visit www.ipexpert.com >> > >> > Are you a CCNP or CCIE and looking for a job? Check out >> > www.PlatinumPlacement.com >> > > > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
