On 10/3/2014 12:38 AM, Saku Ytti wrote: > On (2014-10-02 12:29 -0700), Bruce Pinsky wrote: > > Hi Bruce, > >> How about not taking the default from them and set your own default based >> on whatever criteria you chose. You could, for instance, use Conditional >> Advertisements to inject the default based on the presence or absence of >> routing information from one or the other provider. You could also use PfR >> to select the outbound path based on availability/performance/cost. > > You don't actually need anything this complex. Just recursing static route > will do, and IOS by default recurses. > So both upstreams would advertise to you some prefix they don't originate in > the peer router, maybe their PA network from the core. > > Then you'd have something like > ip route 0.0.0.0 0.0.0.0 <pa-prefix> > > If one upstream peer gets disconnected from their core, the PA-prefix is no > longer sent via that peer, and it'll now recurse to the other provider. >
This can certainly work. The good thing about conditional advertisements is that they don't have to depend on just one prefix. With the recurse method, they do. -- ========= bep _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
