Hi we faced some strange thing with Cumulus Quagga, and suspect same problem can be in the FRR and would like to fix for the FRR actually, but not sure how to reproduce / collect info. There is one bgp neighbor which is not possible to delete pmx2-lc(config-router)# no neighbor 169.254.3.158 this command passes without any error, but neighbor stay in the config pmx2-lc(config-router)# do sh ip bgp sum BGP router identifier 185.47.156.72, local AS number 65002 vrf-id 0 BGP table version 10800 RIB entries 36, using 4320 bytes of memory Peers 15, using 242 KiB of memory Peer groups 1, using 56 bytes of memory Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd sw-r02-lc(eth0) 4 65001 2274657 2302512 0 0 0 11w1d16h 2 sw-r01-lc(eth1) 4 65001 2153318 2181383 0 0 0 01w6d06h 2 lc-asp-03.inn.local(tap142i0) 4 65501 5252 5250 0 0 0 01:55:45 3 kafka3-lc(tap156i0) 4 65501 1386887 1387056 0 0 0 06w6d00h 1 graphite12-lc(tap159i0) 4 65501 155671 155670 0 0 0 5d06h52m 2 169.254.0.22 4 65501 2563492 2254328 0 0 0 06w5d23h 1 169.254.2.178 4 65501 2694 3669 0 0 0 00:09:25 Active 169.254.3.110 4 65501 2506996 2203248 0 0 0 6d06h59m 1 169.254.3.114 4 65501 2506872 2203170 0 0 0 6d06h58m 1 169.254.3.118 4 65501 2506884 2203161 0 0 0 6d06h58m 1 169.254.3.134 4 65501 2565467 2254302 0 0 0 01w6d05h 1 169.254.3.138 4 65501 2564879 2254199 0 0 0 01w6d05h 1 169.254.3.158 4 65501 2561502 2248955 0 0 0 02:07:54 Active <--- THIS one - UNDELETABLE neighbor 169.254.3.162 4 65501 2567715 2255136 0 0 0 11w0d19h 1 169.254.3.170 4 65501 2579032 2265582 0 0 0 02w0d15h 1 (edited) That neighbor is not recognized by configurator which allows to add second neighbor with the same IP 169.254.3.138 4 65501 2565041 2254344 0 0 0 01w6d05h 1 169.254.3.158 4 65501 2561502 2248955 0 0 0 02:15:03 Active <-------- undeletable neighbor 169.254.3.158 4 888 0 0 0 0 0 never Active <-------- new neighbor 169.254.3.162 4 65501 2567879 2255281 0 0 0 11w0d19h 1 then deleting will remove only new one pmx2-lc(config-router)# no neighbor 169.254.3.158 pmx2-lc(config-router)# no neighbor 169.254.3.158 pmx2-lc(config-router)# no neighbor 169.254.3.158 169.254.3.138 4 65501 2565041 2254344 0 0 0 01w6d05h 1 169.254.3.158 4 65501 2561502 2248955 0 0 0 02:15:03 Active <-------- undeletable neighbor 169.254.3.162 4 65501 2567879 2255281 0 0 0 11w0d19h 1 The problem was solved after quagga daemon had been restarted. Best Regards Tigran Martirosyan R&D Director www.xcloudnetworks.com <http://www.xcloudnetworks.com/>