upink uplink | | | | RouterA-----RouterB \ / \ / \ / RouterC so ,that's is the topology. router A,B,C runs ospf router A,B, and uplink router runs ISIS
routerC 's loopback0 is redistributed into OSPF (1.1.1.1/32), so A,B,C all have this ospf external route, default preference 150 routerA & routerB BOTH redistribute this ospf route 1.1.1.1/32 into ISIS Here is the problem, in my opinion, when A & B redistribute this ospf external route into ISIS, A&B should have this route in both OSPF & ISIS,(A advertise this route to B via ISIS, and B advertise this route to A in ISIS). The fact is not this. When i show route on A, i find 1 route in OSPF, and another in ISIS(B advertise to A). But only the ospf route is found on B. Seems that A didn't advertise this route 1.1.1.1/32 to B. This route ( 1.1.1.1/32) was redistribute into ISIS on A coz i find it in the A's ISIS database. Wat's more, A didn't advertise this route to the uplink router either. Could anyone explain this? Any advise ll be appreciated. Regards runt _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp