If you "sh arp" do you see the right MAC address for the ip. Could that address be in use on some dumb device?
Sent from my iPhone > On Nov 26, 2014, at 2:43, "Victor Sudakov" <v...@mpeks.tomsk.su> wrote: > > Colleagues, > > We have found a very interesting problem. > > There are a dozen routers connected to a common 10.65.127.224/27 L2 > backbone. All are running OSPF area 0. Any router which has the IP > address 10.65.127.246 cannot establish OSPF adjacency with some other > routers, showing them forever in the INIT/DROTHER or EXSTART/DROTHER > state. > > When a different IP address is configured on the same router, the > problem is solved. More over, when 10.65.127.246 is configured on ANY > router in the segment, it experiences adjacency problems. > > We are currently using a workaround of never assigning 10.65.127.246 > to any router. Is this Sauron's IP address, or is there some kind of curse > thereon? > > Below is a typical output > > sw-bptoik#sh ip ospf 12 neighbor > > Neighbor ID Pri State Dead Time Address Interface > 10.65.127.7 130 2WAY/DROTHER 984 msec 10.65.127.249 Vlan22 > 10.65.127.9 130 FULL/DR 707 msec 10.65.127.250 Vlan22 > 10.65.127.10 1 2WAY/DROTHER 942 msec 10.65.127.248 Vlan22 > 10.65.127.12 1 2WAY/DROTHER 841 msec 10.65.127.252 Vlan22 > 10.65.127.13 1 INIT/DROTHER 942 msec 10.65.127.235 Vlan22 > 10.65.127.14 1 INIT/DROTHER 782 msec 10.65.127.245 Vlan22 > 10.65.127.15 130 INIT/DROTHER 908 msec 10.65.127.251 Vlan22 > 10.65.127.17 1 2WAY/DROTHER 866 msec 10.65.127.241 Vlan22 > 10.65.127.19 1 2WAY/DROTHER 959 msec 10.65.127.238 Vlan22 > 10.65.127.21 1 2WAY/DROTHER 740 msec 10.65.127.244 Vlan22 > 10.65.127.22 0 INIT/DROTHER 766 msec 10.65.127.243 Vlan22 > 10.65.127.23 1 2WAY/DROTHER 891 msec 10.65.127.230 Vlan22 > 10.65.127.24 1 2WAY/DROTHER 682 msec 10.65.127.231 Vlan22 > 10.65.155.11 1 2WAY/DROTHER 816 msec 10.65.127.253 Vlan22 > 172.16.146.11 1 2WAY/DROTHER 858 msec 10.65.127.247 Vlan22 > > > sw-bptoik#sh ip ospf int Vlan22 > Vlan22 is up, line protocol is up > Internet Address 10.65.127.246/27, Area 0 > Process ID 12, Router ID 10.65.127.246, Network Type BROADCAST, Cost: 1 > Topology-MTID Cost Disabled Shutdown Topology Name > 0 1 no no Base > Transmit Delay is 1 sec, State DROTHER, Priority 1 > Designated Router (ID) 10.65.127.9, Interface address 10.65.127.250 > Backup Designated router (ID) 10.65.127.9, Interface address 10.65.127.250 > Timer intervals configured, Hello 333 msec, Dead 1, Wait 1, Retransmit 5 > oob-resync timeout 40 > Hello due in 264 msec > Supports Link-local Signaling (LLS) > Cisco NSF helper support enabled > IETF NSF helper support enabled > Index 1/1, flood queue length 0 > Next 0x0(0)/0x0(0) > Last flood scan length is 1, maximum is 1 > Last flood scan time is 0 msec, maximum is 0 msec > Neighbor Count is 15, Adjacent neighbor count is 1 > Adjacent with neighbor 10.65.127.9 (Designated Router) > Suppress hello for 0 neighbor(s) > > > > -- > Victor Sudakov, VAS4-RIPE, VAS47-RIPN > sip:suda...@sibptus.tomsk.ru > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/