注:所有以下分类操作都需要在对端ospf路由器上使用clear ip ospf process命令刷新LSDB。
 

1>ip ospf demand-circuit
抑制周期性refresh(使用DoNotAge位flood LSAs),无Hello更新。
 
+++++++++++++++++++++++++++++++++++++++++++++++++
注:抑制除邻居Router LSA之外的所有LSAs,因为还需要邻居Router LSA维护Adjacency。
+++++++++++++++++++++++++++++++++++++++++++++++++

2>dababase-filter all out
抑制LSA向指定邻居、接口扩散,有Hello更新。
 
+++++++++++++++++++++++++++++++++++++++++++++++++
注:抑制除邻居Router LSA之外的所有LSAs,因为还需要邻居Router LSA维护Adjacency。
+++++++++++++++++++++++++++++++++++++++++++++++++
 
R1(config-router)#neighbor ip-address database-filter all out
只能用于NBMA和P2M网络。
R1(config-if)#ip ospf database-filter all out
可以应用于所有接口。
 
3>ip ospf flood-reductoin
抑制周期性refresh(使用DoNotAge位flood LSAs),有Hello更新。
 
+++++++++++++++++++++++++++++++++++++++++++++++++
注:抑制除邻居Router LSA之外的所有LSAs,因为还需要邻居Router LSA维护Adjacency。
+++++++++++++++++++++++++++++++++++++++++++++++++

4>area area-id filter-list prefix prefix-name in/out
过滤area之间的type-3 LSA。
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
area-id想要过滤LSA的立足area。
如有两个area:area1,area2。如果想要过滤从area1->area2的1.1.1.0/24条目,则可以写为:
area 1 filter-list prefix deny_1.1.1.0 out
也可以写为:
area 0 filter-list prefix deny_1.1.1.0 in
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
 
 
OSPF LSA抑制详解_type-3lsa

Section I.  ip ospf demand-circuit配置实例

r2#sh run
interface FastEthernet0/0
 description conn_to_r3_f0/0_192.168.1.6
 ip address 192.168.1.5 255.255.255.252
 duplex auto
 speed auto
!
interface Serial1/0
 description conn_to_r1_s1/0_192.168.1.2
 ip address 192.168.1.1 255.255.255.252
 ip ospf demand-circuit
 serial restart-delay 0
!
router ospf 100
 router-id 10.0.0.1
 log-adjacency-changes
 network 192.168.1.0 0.0.0.3 area 0
 network 192.168.1.4 0.0.0.3 area 0
----------------------------------------------
r1#sh run
interface FastEthernet0/0
 description conn_to_r3_f0/0_192.168.1.10
 ip address 192.168.1.9 255.255.255.252
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial1/0
 description conn_to_r2_s1/0_192.168.1.1
 ip address 192.168.1.2 255.255.255.252
 serial restart-delay 0
!
router ospf 100
 router-id 10.0.0.2
 log-adjacency-changes
 network 192.168.1.0 0.0.0.3 area 0
 network 192.168.1.8 0.0.0.3 area 0
-------------------------------------------------
R4#sh run
interface Loopback0
 ip address 4.4.0.1 255.255.255.0
 ip ospf network point-to-point
!
interface Loopback1
 ip address 4.4.1.1 255.255.255.0
!
interface FastEthernet0/0
 description conn_to_r2_f0/0_192.168.1.5
 ip address 192.168.1.6 255.255.255.252
 duplex auto
 speed auto
!        
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
router ospf 100
 router-id 10.0.0.4
 log-adjacency-changes
 network 4.4.0.0 0.0.0.255 area 0
 network 4.4.1.0 0.0.0.255 area 0
 network 192.168.1.4 0.0.0.3 area 0
----------------------------------------------------
r1#clea ip ospf p
Reset ALL OSPF processes? [no]: y
r1#
r1#sh ip ospf da
            OSPF Router with ID (10.0.0.2) (Process ID 100)
                Router Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        5     (DNA) 0x80000024 0x00BFDD 3
10.0.0.2        10.0.0.2        233         0x80000002 0x00F239 3
10.0.0.4        10.0.0.4        452   (DNA) 0x80000007 0x00CC27 3
                Net Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum
192.168.1.5     10.0.0.1        249   (DNA) 0x80000002 0x003375
 
+++++++++++++++++++++++++++++++++++++++++++++++++
注:抑制除邻居Router LSA之外的所有LSAs,因为还需要邻居Router LSA维护Adjacency。
+++++++++++++++++++++++++++++++++++++++++++++++++
 
r1#sh ip ospf int s1/0
Serial1/0 is up, line protocol is up
  Internet Address 192.168.1.2/30, Area 0
  Process ID 100, Router ID 10.0.0.2, Network Type POINT_TO_POINT, Cost: 64
  Run as demand circuit.
  DoNotAge LSA allowed.

  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 00:00:06
  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 1, Adjacent neighbor count is 1
    Adjacent with neighbor 10.0.0.1  (Hello suppressed)
  Suppress hello for 1 neighbor(s)
----------------------------------------------------------------------------
 

Section II. database-filter all out命令配置实例:
r2#sh run
interface FastEthernet0/0
 description conn_to_r3_f0/0_192.168.1.6
 ip address 192.168.1.5 255.255.255.252
 duplex auto
 speed auto
!
interface Serial1/0
 description conn_to_r1_s1/0_192.168.1.2
 ip address 192.168.1.1 255.255.255.252
 ip ospf database-filter all out
 serial restart-delay 0
!
router ospf 100
 router-id 10.0.0.1
 log-adjacency-changes
 network 192.168.1.0 0.0.0.3 area 0
 network 192.168.1.4 0.0.0.3 area 0
----------------------------------------------
r1#sh run
interface FastEthernet0/0
 description conn_to_r3_f0/0_192.168.1.10
 ip address 192.168.1.9 255.255.255.252
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial1/0
 description conn_to_r2_s1/0_192.168.1.1
 ip address 192.168.1.2 255.255.255.252
 serial restart-delay 0
!
router ospf 100
 router-id 10.0.0.2
 log-adjacency-changes
 network 192.168.1.0 0.0.0.3 area 0
 network 192.168.1.8 0.0.0.3 area 0
-------------------------------------------------
R4#sh run
interface Loopback0
 ip address 4.4.0.1 255.255.255.0
 ip ospf network point-to-point
!
interface Loopback1
 ip address 4.4.1.1 255.255.255.0
!
interface FastEthernet0/0
 description conn_to_r2_f0/0_192.168.1.5
 ip address 192.168.1.6 255.255.255.252
 duplex auto
 speed auto
!        
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
router ospf 100
 router-id 10.0.0.4
 log-adjacency-changes
 network 4.4.0.0 0.0.0.255 area 0
 network 4.4.1.0 0.0.0.255 area 0
 network 192.168.1.4 0.0.0.3 area 0
----------------------------------------------------
r2#sh ip ospf int s1/0
Serial1/0 is up, line protocol is up
  Internet Address 192.168.1.1/30, Area 0
  Process ID 100, Router ID 10.0.0.1, Network Type POINT_TO_POINT, Cost: 64
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Database-filter all out
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    oob-resync timeout 40
    Hello due in 00:00:08
  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 4 msec
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 10.0.0.2
  Suppress hello for 0 neighbor(s)
-----------------------------------------------------
r1#clea ip ospf p
Reset ALL OSPF processes? [no]: y
r1#sh ip ospf database
            OSPF Router with ID (10.0.0.2) (Process ID 100)
                Router Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.2        10.0.0.2        11          0x80000002 0x00F239 3
 
+++++++++++++++++++++++++++++++++++++++++++++++++
注:抑制除邻居Router LSA之外的所有LSAs,因为还需要邻居Router LSA维护Adjacency。
+++++++++++++++++++++++++++++++++++++++++++++++++
 
 
 
Section III. ip ospf flood-reduction配置实例
 
r2(config)#int s1/0
r2(config-if)#no ip ospf database-filter all out
r2(config-if)#
r2(config-if)#
*Mar  1 01:06:54.199: %OSPF-5-ADJCHG: Process 100, Nbr 10.0.0.2 on Serial1/0 from FULL to
DOWN, Neighbor Down: Interface down or deta   
r2(config-if)#
r2(config-if)#
r2(config-if)#
*Mar  1 01:06:56.775: %OSPF-5-ADJCHG: Process 100, Nbr 10.0.0.2 on Serial1/0 from LOADING
to FULL, Loading Doneip ospf
r2(config-if)#
r2(config-if)#
r2(config-if)#      
r2(config-if)#ip ospf flood-reduction
-----------------------------------------------------------------------------
r1#sh ip ospf database      
            OSPF Router with ID (10.0.0.2) (Process ID 100)
                Router Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        1     (DNA) 0x8000001F 0x00C9D8 3
10.0.0.2        10.0.0.2        86          0x80000002 0x00F239 3
10.0.0.4        10.0.0.4        206   (DNA) 0x80000007 0x00CC27 3
                Net Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum
192.168.1.5     10.0.0.1        2     (DNA) 0x80000002 0x003375
-------------------------------------------------------------------------------
 
 

Section IV. area area-id filter-list prefix prefix-name in/out配置实例

r2#sh run
interface FastEthernet0/0
 description conn_to_r3_f0/0_192.168.1.6
 ip address 192.168.1.5 255.255.255.252
 duplex auto
 speed auto
!
interface Serial1/0
 description conn_to_r2_s1/0_192.168.1.2
 ip address 192.168.1.1 255.255.255.252
 serial restart-delay 0
!        
router ospf 100
 router-id 10.0.0.1
 log-adjacency-changes
 network 192.168.1.0 0.0.0.3 area 0
 network 192.168.1.4 0.0.0.3 area 1
----------------------------------------------------
r1#sh run
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
!
interface Serial1/0
 description conn_to_r2_s1/0_192.168.1.1
 ip address 192.168.1.2 255.255.255.252
 serial restart-delay 0
!
router ospf 100
 router-id 10.0.0.2
 log-adjacency-changes
 network 192.168.1.0 0.0.0.3 area 0
 network 192.168.1.8 0.0.0.3 area 0
----------------------------------------------------
r4#sh run
interface Loopback0
 ip address 4.4.0.1 255.255.255.0
 ip ospf network point-to-point
!
interface Loopback1
 ip address 4.4.1.1 255.255.255.0
!
interface FastEthernet0/0
 description conn_to_r2_f0/0_192.168.1.5
 ip address 192.168.1.6 255.255.255.252
 duplex auto
 speed auto
!
router ospf 100
 router-id 10.0.0.4
 log-adjacency-changes
 network 4.4.0.0 0.0.0.255 area 1
 network 4.4.1.0 0.0.0.255 area 1
 network 192.168.1.4 0.0.0.3 area 1
----------------------------------------------------
r2#clear ip ospf p
r2#clear ip ospf process
Reset ALL OSPF processes? [no]: y
r2#
r2#
r2#
*Mar  1 01:31:57.139: %OSPF-5-ADJCHG: Process 100, Nbr 10.0.0.2 on Serial1/0 from FULL to
DOWN, Neighbor Down: Interface down or detached
*Mar  1 01:31:57.183: %OSPF-5-ADJCHG: Process 100, Nbr 10.0.0.4 on FastEthernet0/0 from
FULL to DOWN, Neighbor Down: Interface down or detached
-----------------------------------------------------
r2#sh ip ospf database
            OSPF Router with ID (10.0.0.1) (Process ID 100)
                Router Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        11          0x80000003 0x00406C 2
10.0.0.2        10.0.0.2        18          0x80000004 0x002F7B 2
                Summary Net Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum
4.4.0.0         10.0.0.1        8           0x80000001 0x00D84F
4.4.1.1         10.0.0.1        8           0x80000001 0x00C362
192.168.1.4     10.0.0.1        12          0x80000004 0x00368C
                Router Link States (Area 1)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        11          0x80000004 0x004FE9 1
10.0.0.4        10.0.0.4        18          0x80000008 0x00D120 3
                Net Link States (Area 1)
         
Link ID         ADV Router      Age         Seq#       Checksum
192.168.1.6     10.0.0.4        18          0x80000005 0x00059C
                Summary Net Link States (Area 1)
Link ID         ADV Router      Age         Seq#       Checksum
192.168.1.0     10.0.0.1        13          0x80000003 0x00D8AF
----------------------------------------------------------
r1#sh ip ospf database
            OSPF Router with ID (10.0.0.2) (Process ID 100)
                Router Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        52          0x80000005 0x003C6E 2
10.0.0.2        10.0.0.2        46          0x80000005 0x002D7C 2
                Summary Net Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum
4.4.0.0         10.0.0.1        268         0x80000001 0x00D84F
4.4.1.1         10.0.0.1        268         0x80000001 0x00C362
192.168.1.4     10.0.0.1        272         0x80000004 0x00368C
----------------------------------------------------------
r2(config)#ip prefix-list deny_4.4.0.0 seq 10 deny 4.4.0.0/24
r2(config)#ip prefix-list deny_4.4.0.0 seq 20 permit 0.0.0.0/0 le 32
r2(config)#router ospf 100
r2(config-router)#area 0 filter-list prefix deny_4.4.0.0 in
----------------------------------------------------------
r2#sh ip ospf da
            OSPF Router with ID (10.0.0.1) (Process ID 100)
                Router Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        658         0x80000009 0x003472 2
10.0.0.2        10.0.0.2        653         0x80000007 0x00297E 2
                Summary Net Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum
4.4.1.1         10.0.0.1        1194        0x80000001 0x00C362
192.168.1.4     10.0.0.1        1198        0x80000004 0x00368C
                Router Link States (Area 1)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        1197        0x80000004 0x004FE9 1
10.0.0.4        10.0.0.4        1204        0x80000008 0x00D120 3
                Net Link States (Area 1)
Link ID         ADV Router      Age         Seq#       Checksum
192.168.1.6     10.0.0.4        1204        0x80000005 0x00059C
                Summary Net Link States (Area 1)
Link ID         ADV Router      Age         Seq#       Checksum
192.168.1.0     10.0.0.1        1199        0x80000003 0x00D8AF
--------------------------------------------------------
r1#sh ip ospf da
            OSPF Router with ID (10.0.0.2) (Process ID 100)
                Router Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        673         0x80000009 0x003472 2
10.0.0.2        10.0.0.2        668         0x80000007 0x00297E 2
                Summary Net Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum
4.4.1.1         10.0.0.1        1209        0x80000001 0x00C362
192.168.1.4     10.0.0.1        1213        0x80000004 0x00368C

---------------------------------------------------------
r2(config)#router ospf 100
r2(config-router)#area 1 filter-list prefix deny_4.4.0.0 out
---------------------------------------------------------
r2#sh ip ospf database
            OSPF Router with ID (10.0.0.1) (Process ID 100)
                Router Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        8           0x8000000A 0x003273 2
10.0.0.2        10.0.0.2        15          0x80000009 0x002580 2
                Summary Net Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum
4.4.1.1         10.0.0.1        5           0x80000001 0x00C362
192.168.1.4     10.0.0.1        9           0x80000005 0x00348D
                Router Link States (Area 1)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        8           0x80000005 0x004DEA 1
10.0.0.4        10.0.0.4        15          0x8000000A 0x00CD22 3
                Net Link States (Area 1)
Link ID         ADV Router      Age         Seq#       Checksum
192.168.1.6     10.0.0.4        15          0x80000007 0x00019E
                Summary Net Link States (Area 1)
Link ID         ADV Router      Age         Seq#       Checksum
192.168.1.0     10.0.0.1        10          0x80000004 0x00D6B0
---------------------------------------------------------------
r1#sh ip ospf database
            OSPF Router with ID (10.0.0.2) (Process ID 100)
                Router Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.1        10.0.0.1        72          0x8000000A 0x003273 2
10.0.0.2        10.0.0.2        77          0x80000009 0x002580 2
                Summary Net Link States (Area 0)
Link ID         ADV Router      Age         Seq#       Checksum
4.4.1.1         10.0.0.1        69          0x80000001 0x00C362
192.168.1.4     10.0.0.1        73          0x80000005 0x00348D