Hi Clemens, What version of BSDRP are you using? I would suggest that you check your configuration for some errors in peers definitions in the first place. A help from a colleague of yours would help a lot (I have had some stupid typos like using /29 instead of /30 and the sort, also metrics here and there in route-maps could be good place to look for errors) Another thing you could try is to reconfigure the peers one by one but not copy and paste. Take some time to make the configurations again. Most probably it is a matter of configuration.
Regards, Lyubo On Fri, 18 Jun 2021 at 16:05, Clemens Zauner <czau...@atnoc.net> wrote: > > We changed a Borderrouter to an BSDRP, 2 Weeks ago. I have some strange > issues. There ist one BSDRP/FRR and one Cisco involved, on this part of > the Network: > > We are AS35339, One Upstream is AS179 the oder is AS1299 > > For Instance, now I'm having a 'looping' towards 51.15.183.144 > (www.lymo.fr). My core finds a valid path to the BSDR (facing AS179), > routing packets towards this machine. > > On the BSDRP-Box: > > amarklor.atnoc.net# sh ip route 51.15.183.144 > Routing entry for 51.15.0.0/16 > Known via "bgp", distance 20, metric 25061, best > Last update 3d17h44m ago > * 149.6.174.241, via cxl0, weight 1 > > amarklor.atnoc.net# sh ip bgp 51.15.0.0/16 > BGP routing table entry for 51.15.0.0/16 > Paths: (1 available, best #1, table default) > Advertised to non peer-group peers: > 193.239.188.34 193.239.188.36 193.239.188.214 193.239.188.216 > 174 12876 > 149.6.174.241 (metric 1) from 149.6.174.241 (154.26.32.25) > Origin IGP, metric 25061, valid, external, best (First path > received) > Community: 174:21101 174:22008 > Last update: Mon Jun 14 19:07:01 2021 > amarklor.atnoc.net# > > > Which is also reflected in the kernel routing-table: > [root@amarklor]/etc# route -n get 51.15.183.144 > route to: 51.15.183.144 > destination: 51.15.0.0 > mask: 255.255.0.0 > gateway: 149.6.174.241 > fib: 0 > interface: cxl0 > flags: <UP,GATEWAY,DONE,PROTO1> > recvpipe sendpipe ssthresh rtt,msec mtu weight expire > 0 0 0 0 1500 1 0 > [root@amarklor]/etc# > > > *BUT*: > [root@amarklor]/etc# traceroute -n 51.15.183.144 > traceroute to 51.15.183.144 (51.15.183.144), 64 hops max, 40 byte > packets > 1 193.239.188.36 0.486 ms 0.297 ms 0.271 ms > 2 193.239.188.38 0.341 ms 0.154 ms 0.094 ms > 3 193.239.188.36 0.312 ms 0.382 ms 0.300 ms > 4 193.239.188.38 0.295 ms 0.260 ms 0.254 ms > 5 193.239.188.36 0.563 ms 0.512 ms 0.558 ms > > With 193.239.188.36 beeing the Cisco towards AS1299; and 193.239.188.38 > beeing the BSDRP. Why does BSDRP send the packets to 193.239.188.36, > even if an 'route get' clearly shows the correct nex-hop 149.6.174.241 > within AS179? > > > > The routing-Inforation on the Cisco reflects the Cisco's FIB: > gant#sh ip route 51.15.183.144 > Routing entry for 51.15.0.0/16 > Known via "bgp 35339", distance 200, metric 25061 > Tag 174, type internal > Last update from 149.6.174.241 3d18h ago > Routing Descriptor Blocks: > * 149.6.174.241, from 193.239.188.38, 3d18h ago > Route metric is 25061, traffic share count is 1 > AS Hops 2 > Route tag 174 > MPLS label: none > gant#sh ip bgp 51.15.0.0/16 > BGP routing table entry for 51.15.0.0/16, version 66104870 > Paths: (2 available, best #1, table default) > Not advertised to any peer > Refresh Epoch 1 > 174 12876 > 149.6.174.241 (metric 20) from 193.239.188.38 (193.239.188.197) > Origin IGP, metric 25061, localpref 100, valid, internal, best > Community: 174:21101 174:22008 > rx pathid: 0, tx pathid: 0x0 > Refresh Epoch 1 > 1299 3356 12876 > 213.248.76.28 from 213.248.76.28 (2.255.254.134) > Origin IGP, localpref 100, valid, external > Community: 1299:20000 > rx pathid: 0, tx pathid: 0 > gant# > > Am I missing something? > Clemens. > > _______________________________________________ > Bsdrp-users mailing list > Bsdrp-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bsdrp-users >
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