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default originate route is injected in NSSA even in passive interface

jigojar
Level 1
Level 1

Hi Genius,

  default route is injected in NSSA even if we configured passive interface. 

 

KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface
210.18.0.123 0 FULL/ - 00:00:38 100.65.225.173 FastEthernet0/1.802
KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip rou
KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip route 0.0.0.0
Routing entry for 0.0.0.0/0, supernet
Known via "ospf 10", distance 110, metric 1, candidate default path, type NSSA extern 2, forward metric 70
Last update from 100.65.225.175 on FastEthernet0/1.801, 00:02:56 ago
Routing Descriptor Blocks:
* 100.65.225.175, from 202.144.0.12, 00:02:56 ago, via FastEthernet0/1.801
Route metric is 1, traffic share count is 1

KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip os
KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip ospf int
KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip ospf interface FastEthernet0/1.801
FastEthernet0/1.801 is up, line protocol is up
Internet Address 100.65.225.174/31, Area 162.0.0.0
Process ID 10, Router ID 119.227.1.199, Network Type POINT_TO_POINT, Cost: 70
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:00
Supports Link-local Signaling (LLS)
Index 3/3, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 51
Last flood scan time is 0 msec, maximum is 36 msec
Neighbor Count is 0, Adjacent neighbor count is 0
Suppress hello for 0 neighbor(s)
Message digest authentication enabled
Youngest key id is 1
KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#

2 Replies 2

jigojar
Level 1
Level 1

OSPF NEIGHBOR

====================

 

KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface
210.18.0.123 0 FULL/ - 00:00:38 100.65.225.173 FastEthernet0/1.802
KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#s

 

 

DEFAULT ROUTE IS LEARNING VIA PASSIVE INTERFACE

=============================================

 

KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip route 0.0.0.0
Routing entry for 0.0.0.0/0, supernet
Known via "ospf 10", distance 110, metric 1, candidate default path, type NSSA extern 2, forward metric 70
Last update from 100.65.225.175 on FastEthernet0/1.801, 00:02:56 ago
Routing Descriptor Blocks:
* 100.65.225.175, from 202.144.0.12, 00:02:56 ago, via FastEthernet0/1.801
Route metric is 1, traffic share count is 1

 

 

OSPF INTERFACE STATUS

========================

 

KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip ospf interface FastEthernet0/1.801
FastEthernet0/1.801 is up, line protocol is up
Internet Address 100.65.225.174/31, Area 162.0.0.0
Process ID 10, Router ID 119.227.1.199, Network Type POINT_TO_POINT, Cost: 70
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:00
Supports Link-local Signaling (LLS)
Index 3/3, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 51
Last flood scan time is 0 msec, maximum is 36 msec
Neighbor Count is 0, Adjacent neighbor count is 0
Suppress hello for 0 neighbor(s)
Message digest authentication enabled
Youngest key id is 1
KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#

 

 

NSSA ROUTES LEARNING IN OSPF DATABASE

======================================

 

KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#sh ip ospf database nssa-external

OSPF Router with ID (119.227.1.199) (Process ID 10)

Type-7 AS External Link States (Area 162.0.0.0)

Routing Bit Set on this LSA
LS age: 531
Options: (No TOS-capability, No Type 7/5 translation, DC)
LS Type: AS External Link
Link State ID: 0.0.0.0 (External Network Number )
Advertising Router: 202.144.0.12
LS Seq Number: 8000BD62
Checksum: 0x965D
Length: 36
Network Mask: /0
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 1
Forward Address: 100.65.225.175
External Route Tag: 0

Routing Bit Set on this LSA
LS age: 826
Options: (No TOS-capability, No Type 7/5 translation, DC)
LS Type: AS External Link
Link State ID: 0.0.0.0 (External Network Number )
Advertising Router: 210.18.0.123
LS Seq Number: 80015A38
Checksum: 0x54C8
Length: 36
Network Mask: /0
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 1
Forward Address: 119.227.1.69
External Route Tag: 0

KA-DOB-DPB-B4-BS-NCN-BSR-C281-01-DOB#

Please submit the configuration of the router in question, as well as the neighbors. OSPF is a little different than EIGRP in that each router will have all available route information. We might have to solve your problem using a distribute-list or another router filtering mechanism.

 

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