[c-nsp] Cursed IP address

[Victor Sudakov]

Davis, Philip wrote:
> When you made your testbed did you have the same problem if the
> subnet mask was different?

The problem persists regardless of the subnet mask:


sw-parabel#sh ip ospf 20 neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
10.65.127.241     1   FULL/DR         958 msec    10.65.127.241   Vlan333
10.65.127.242     1   FULL/BDR        916 msec    10.65.127.242   Vlan333
10.65.127.243     1   INIT/DROTHER    975 msec    10.65.127.243   Vlan333
10.65.127.244     1   INIT/DROTHER    899 msec    10.65.127.244   Vlan333
10.65.127.245     1   INIT/DROTHER    706 msec    10.65.127.245   Vlan333
10.65.127.247     1   INIT/DROTHER    748 msec    10.65.127.247   Vlan333

sw-parabel#sh ip ospf interface vlan 333
Vlan333 is up, line protocol is up
  Internet Address 10.65.127.246/24, Area 0
  Process ID 20, 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) 10.65.127.241, Interface address 10.65.127.241
  Backup Designated router (ID) 10.65.127.242, Interface address 10.65.127.242
  Timer intervals configured, Hello 333 msec, Dead 1, Wait 1, Retransmit 5
    oob-resync timeout 40
    Hello due in 170 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 0, maximum is 7
  Last flood scan time is 0 msec, maximum is 8 msec
  Neighbor Count is 6, Adjacent neighbor count is 2
    Adjacent with neighbor 10.65.127.241  (Designated Router)
    Adjacent with neighbor 10.65.127.242  (Backup Designated Router)
  Suppress hello for 0 neighbor(s)

sw-parabel#sh arp vrf OSPF
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  10.65.127.241           4   6073.5cac.1cc5  ARPA   Vlan333
Internet  10.65.127.242           4   4403.a7cb.2644  ARPA   Vlan333
Internet  10.65.127.243           4   4403.a7d1.7dc3  ARPA   Vlan333
Internet  10.65.127.244           4   4403.a7cc.72c2  ARPA   Vlan333
Internet  10.65.127.245           4   4403.a7d1.64c2  ARPA   Vlan333
Internet  10.65.127.246           -   e4d3.f1cc.f2c1  ARPA   Vlan333
Internet  10.65.127.247           4   4403.a7cf.74c3  ARPA   Vlan333

sw-rrs-nvartovsk#sh arp vrf OSPF
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  10.65.127.241           0   6073.5cac.1cc5  ARPA   Vlan333
Internet  10.65.127.242           0   4403.a7cb.2644  ARPA   Vlan333
Internet  10.65.127.243           0   4403.a7d1.7dc3  ARPA   Vlan333
Internet  10.65.127.244           0   4403.a7cc.72c2  ARPA   Vlan333
Internet  10.65.127.245           0   4403.a7d1.64c2  ARPA   Vlan333
Internet  10.65.127.246           0   e4d3.f1cc.f2c1  ARPA   Vlan333
Internet  10.65.127.247           -   4403.a7cf.74c3  ARPA   Vlan333

sw-rrs-nvartovsk#sh ip ospf 20 neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
10.65.127.241     1   FULL/DR         1000 msec    10.65.127.241   Vlan333
10.65.127.242     1   FULL/BDR        748 msec    10.65.127.242   Vlan333
10.65.127.243     1   2WAY/DROTHER    865 msec    10.65.127.243   Vlan333
10.65.127.244     1   2WAY/DROTHER    916 msec    10.65.127.244   Vlan333
10.65.127.245     1   2WAY/DROTHER    723 msec    10.65.127.245   Vlan333

sw-rrs-nvartovsk#sh ip ospf interface vlan 333
Vlan333 is up, line protocol is up
  Internet Address 10.65.127.247/24, Area 0
  Process ID 20, Router ID 10.65.127.247, 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) 10.65.127.241, Interface address 10.65.127.241
  Backup Designated router (ID) 10.65.127.242, Interface address 10.65.127.242
  Timer intervals configured, Hello 333 msec, Dead 1, Wait 1, Retransmit 5
    oob-resync timeout 40
    Hello due in 22 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 0, maximum is 1
  Last flood scan time is 0 msec, maximum is 8 msec
  Neighbor Count is 5, Adjacent neighbor count is 2
    Adjacent with neighbor 10.65.127.241  (Designated Router)
    Adjacent with neighbor 10.65.127.242  (Backup Designated Router)
  Suppress hello for 0 neighbor(s)
-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov at sibptus.tomsk.ru