2.6 OSPF LSA过滤、overflow

2.过滤基于区域的LSA

1)先删除基于接口的LSA过滤，创建ACL，设置过滤R4的环回口,R2出口做过滤ACL

[R2-GigabitEthernet0/0/1]undo ospf filter-lsa-out summary ase
[R2]acl 2000
[R2-acl-basic-2000]rule deny source 4.4.4.4 0
[R2-acl-basic-2000]rule permit 
[R2]ospf 1
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]filter 2000 export 

2)R3查看LSDB

<R3>display ospf lsdb
         OSPF Process 1 with Router ID 3.3.3.3
                 Link State Database 
                         Area: 0.0.0.1
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 Router    2.2.2.2         2.2.2.2            752  48    8000001C       0
 Router    3.3.3.3         3.3.3.3            741  36    80000019       1
 Network   23.1.1.3        3.3.3.3            741  32    80000002       0
 Sum-Net   14.0.0.0        2.2.2.2           1199  28    80000002       2
 Sum-Net   24.0.0.0        2.2.2.2           1199  28    80000002       1
 Sum-Net   12.0.0.0        2.2.2.2           1199  28    80000002       1
 Sum-Asbr  1.1.1.1         2.2.2.2           1199  28    80000002       1
                 AS External Database
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 External  33.1.2.1        3.3.3.3           1083  36    80000001       1
 External  33.1.3.1        3.3.3.3           1083  36    80000001       1
 External  33.1.1.1        3.3.3.3           1083  36    80000001       1
 External  23.0.0.0        3.3.3.3           1083  36    80000001       1
 External  3.3.3.3         3.3.3.3           1083  36    80000001       1
 External  11.1.2.1        1.1.1.1           1325  36    80000002       1
 External  11.1.3.1        1.1.1.1           1325  36    80000002       1
 External  11.1.1.1        1.1.1.1           1325  36    80000002       1
 External  14.0.0.0        1.1.1.1           1325  36    80000002       1
 External  12.0.0.0        1.1.1.1           1325  36    80000002       1
 External  1.1.1.1         1.1.1.1           1325  36    80000002       1

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