I advertise a default route via an igp. (Ospf) when traffic gets to the border routers, the best path is chosen thanks to ibgp between the two border routers. I also maintain redundant links between the two border routers so that an outage won't matter.
Will O'Brien On Sep 30, 2013, at 5:52 PM, "George Hong" <georgehon...@gmail.com> wrote: > Hi Juniper Guru's. > > I Have a question regarding the best way to generate a default route in BGP. > > The topology is as below. Rtr1 and rtr2 both have a full EBGP feed > from different providers (incl Default route) > rtr1 and rtr2 have an IBGP session and exchange full tables. > There's also IBGP sessions between: > rtr1- fw1 > rtr1- fw2 > rtr2- fw1 > rtr2- fw2 > > On these sessions we only announce a default route from the routers to > Firewalls. > > > -------- ------- > | rtr1 | | rtr2 | > -------- -------- > > > -------- ------- > | fw1 | | fw2 | > -------- -------- > > The challenge I have is a good way of originating a default route. > For example rtr1 - fw1 is most preferred path (done using local > prefs). But I'm preferring the ISP on rtr2 (localpref). > as a result rtr1 is not sending the default route to fw1, since its > best route was learned through IBGP from rtr2 (unless I'd set it up as > route-reflector). > > Also I don't want the ASpath original ASpath to show up in the > default. It should just be the "I" Locally originated, not the AS of > my provider in there. > > I *do* need the default on both routers as well (I have a few remote > sites using same AS, so rely on default to get there, not interested > in allow-as-in etc now). > So I can't put in a static pointing to my iso, cause I want to make > sure it fails over correctly if that connections becomes unavailable. > I'm guessing that also eliminates the " no-install discard " option as > it will over ride the default route I learned from my ISP and/or other > border router. > > So, wondering what's the best way to do this? any recommendations? > tips? This is for both IPv4 and IPv6 > > Thanks, > George > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp