You should also check for more specific routes inside that block. Using a filter that specifies x.x.x.x/24 exact to prevent smaller announcements.
I Will O'Brien On Mar 29, 2013, at 8:16 AM, "Matthew Crocker" <matt...@corp.crocker.com> wrote: > > Hello, > > I have a weird routing issue where my MX80 is not doing what it is supposed > to do. I have a customer configured with BGP announcing two subnets to me. > The subnets end up in the routing table. One subnet works fine, the other > routes to the wrong machine in my network. Everything looks correct when I > 'show route a.b.c.d' but traceroute goes to the wrong machine creating a > routing loop. > > Is it possible for the FIB to contain different information than what's in > 'show route'? > How do I look at whats in the FIB? > How do I reset the FIB and resync it with the actual routes? > > show route A.B.C.0 detail > > inet.0: 439841 destinations, 876907 routes (439825 active, 0 holddown, 32 > hidden) > Restart Complete > A.B.C.0/24 (1 entry, 1 announced) > *BGP Preference: 170/-101 > Next hop type: Indirect > Address: 0xdeadbeef > Next-hop reference count: 6 > Source: X.Y.Z.11 > Next hop type: Router, Next hop index: 1048574 > Next hop: Q.W.E.195 via ge-1/1/1.0 > Next hop: X.Y.Z.11 via ge-1/1/2.0, selected > Protocol next hop: T.U.V.122 > Indirect next hop: 160865a0 1048575 > State: <Active Int Ext> > Local AS: 1111 Peer AS: 1111 > Age: 13:39 Metric: 0 Metric2: 20 > Task: BGP_1111.X.Y.Z.11+12834 > Announcement bits (3): 0-KRT 4-BGP RT Background 5-Resolve > tree 1 > AS path: 22222 I > Accepted > Localpref: 100 > Router ID: M.N.O.169 > > The routing table clearly shows two paths X.Y.Z.11 & Q.W.E.195 > > trace route shows the packets going to X.Y.Z.13 which sends it back to the > MX80 and we get a happy routing loop. > > The other subnet from the customer looks the same in the show route detail > but it gets routed correctly to X.Y.Z.11 and everything is working. > > -- > Matthew S. Crocker > President > Crocker Communications, Inc. > PO BOX 710 > Greenfield, MA 01302-0710 > > E: matt...@crocker.com > P: (413) 746-2760 > F: (413) 746-3704 > W: http://www.crocker.com > > > > > _______________________________________________ > 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
