On Mon, Oct 27, 2008 at 11:56 PM, <[EMAIL PROTECTED]> wrote: > So what would be the behavior if I set the community for Cogent to set > the Local Preference to 50 in terms of transit traffic? Does that mean > that Cogent's originated traffic would use ATT but Cogent's peers (with > a shorter AS path through Cogent) would still traverse Cogent even > though the lower local preference is there?
Check out "BGP Best Path Selection" on google :-) I think it would go like this : if Cogent has a direct connection to ATT, then traffic from Cogent and everywhere closer to Cogent will go from Cogent to ATT and then to you. If Cogent does not have a direct connection to ATT (OK so that is unlikely), then traffic will leave Cogent on a path towards ATT . . . and the intermediary might just send it back to Cogent . . . -- HTH, Nathan _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
