正确的 2007-11-12 13:01
（OSPF实验）OSPF ABR Type 3 LSA Filtering
[table][tr][td=1,1,536][align=left][b][font=宋体][size=12pt]目录[/size][/font][/b][/align]
[color=#336666][font=宋体][size=10.5pt][align=left][b][color=#336666][font=宋体][size=10.5pt]提要[/size][/font][/color][/b][b][color=#336666][/color][/b][/align]
[align=left][b][color=#336666][font=宋体][size=10.5pt]正文[/size][/font][/color][/b][b][color=#336666][/color][/b][/align]
[align=left][color=#336666]TOPO[/color][color=#336666][font=宋体][size=10.5pt]如下[/size][/font][/color][color=#336666][/color][/align]
[align=left][color=#336666][font=宋体][size=10.5pt]基本配置如下[/size][/font][/color][color=#336666][/color][/align]
[align=left][b][color=#336666][font=宋体][size=10.5pt]验证[/size][/font][/color][/b][b][color=#336666][/color][/b][/align]
[align=left][b][color=#336666][font=宋体][size=10.5pt]附注[/size][/font][/color][/b][b][color=#336666][/color][/b][/align]
[align=left][/size][/font][/color][color=#336666][font=宋体][size=10.5pt][/size][/font][/color][/align]
[align=center][font=宋体][size=9pt][b][u][size=3][color=#003399][/color][/size][/u][/b][/size][/font][/align]
[align=left][color=#336666][font=宋体][size=10.5pt][b][u][font=宋体][color=#003399][/color][/font][/u][/b][/size][/font][/color][/align]
[/td][/tr][tr][td=1,1,536][align=left][font=宋体][size=12pt][b]提要：[/b][/size][/font][font=宋体][size=12pt][/size][/font][/align]
[align=left][font=宋体]讨论[/font][font=Times New Roman] OSPF ABR Type 3 LSA Filtering[/font][/align]
[align=left][url=http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a00800b5d4f.html][u][size=3][color=#800080][font=Times New Roman]cisco[/font][font=宋体]文档关于[/font][font=Times New Roman]OSPF ABR Type 3 LSA Filtering[/font][font=宋体]的解释[/font][/color][/size][/u][/url][size=10.5pt][/size][/align]
[align=left][b][font=宋体][size=12pt]正文[/size][/font][/b][b][font=宋体][size=12pt]：[/size][/font][/b][/align]
[align=left][font=Times New Roman]OSPF ABR Type 3 LSA Filtering[/font][font=宋体]只能在[/font][font=Times New Roman]ABR[/font][font=宋体]上面做[/font][/align]
[align=left][b][font=宋体][size=12pt]TOPO[/size][/font][/b][b][font=宋体][size=12pt]如下[/size][/font][/b][b][font=宋体][size=12pt]： [/size][/font][/b][font=宋体][size=12pt][img=419,172]http://www.one-tom.com/bbs/uploads/20070326_112152_ddd.gif[/img] [/size][/font][/align]
[align=left][b][font=宋体][size=12pt]基本配置如下[/size][/font][/b][b][font=宋体][size=12pt]：[/size][/font][/b][/align]
[align=left]l
[url=http://www.one-tom.com/bbs/RTE_textarea.asp?mode=new&POID=0&ID=1370#R1][b][u][font=宋体][size=3][color=#003399]R1[/color][/size][/font][/u][/b][/url][/align]
[align=left]l
[url=http://www.one-tom.com/bbs/RTE_textarea.asp?mode=new&POID=0&ID=1370#R2][b][u][font=宋体][size=3][color=#003399]R2[/color][/size][/font][/u][/b][/url][/align]
[align=left]l
[url=http://www.one-tom.com/bbs/RTE_textarea.asp?mode=new&POID=0&ID=1370#R3][b][u][font=宋体][size=3][color=#003399]R3[/color][/size][/font][/u][/b][/url][/align]
[table][tr][td=1,1,406][align=center][b][size=12.5pt]R1[/size][/b][b][size=12.5pt][/size][/b][/align]
[/td][/tr][tr][td=1,1,406][size=12pt]interface Loopback0[/size]
[size=12pt]
ip address 1.1.1.1 255.255.255.0[/size]
[size=12pt]
ip ospf network point-to-point[/size]
[size=12pt]![/size]
[size=12pt]interface Serial1/0[/size]
[size=12pt]
ip address 12.1.1.1 255.255.255.0[/size]
[size=12pt]
serial restart-delay 0[/size]
[size=12pt]
no fair-queue[/size]
[size=12pt]![/size]
[size=12pt]interface Serial2/0[/size]
[size=12pt]
ip address 13.1.1.1 255.255.255.0[/size]
[size=12pt]
serial restart-delay 0[/size]
[size=12pt]![/size]
[size=12pt]router ospf 1[/size]
[size=12pt]
router-id 1.1.1.1[/size]
[size=12pt]
log-adjacency-changes[/size]
[size=12pt]
network 12.1.1.0 0.0.0.255 area 0[/size]
[size=12pt]
network 13.1.1.0 0.0.0.255 area [/size]
[align=left][size=12pt] [/size][/align]
[/td][/tr][/table][align=left][size=12pt] [/size][/align]
[table][tr][td=1,1,406][align=center][b][size=12.5pt]R2[/size][/b][b][size=12.5pt][/size][/b][/align]
[/td][/tr][tr][td=1,1,406][size=12pt]interface Loopback0[/size]
[size=12pt]
ip address 2.2.2.2 255.255.255.0[/size]
[size=12pt]![/size]
[size=12pt]interface Serial2/0[/size]
[size=12pt]
ip address 12.1.1.2 255.255.255.0[/size]
[size=12pt]
serial restart-delay 0[/size]
[size=12pt]![/size]
[size=12pt]router ospf 1[/size]
[size=12pt]
router-id 2.2.2.2[/size]
[size=12pt]
log-adjacency-changes[/size]
[align=left][size=12pt]
network 12.1.1.0 0.0.0.255 area 0[/size][size=12pt][/size][/align]
[/td][/tr][/table][align=left][size=12pt] [/size][/align]
[table][tr][td=1,1,406][align=center][b][size=12.5pt]R3[/size][/b][b][size=12.5pt][/size][/b][/align]
[/td][/tr][tr][td=1,1,406][size=12pt]interface Loopback0[/size]
[size=12pt]
ip address 3.3.0.3 255.255.255.0 secondary[/size]
[size=12pt]
ip address 3.3.1.3 255.255.255.0 secondary[/size]
[size=12pt]
ip address 3.3.2.3 255.255.255.0 secondary[/size]
[size=12pt]
ip address 3.3.3.3 255.255.255.0[/size]
[size=12pt]
ip ospf network point-to-point[/size]
[size=12pt]![/size]
[size=12pt]interface Serial1/0[/size]
[size=12pt]
ip address 13.1.1.3 255.255.255.0[/size]
[size=12pt]
serial restart-delay 0[/size]
[size=12pt]
no fair-queue[/size]
[size=12pt]![/size]
[size=12pt]router ospf 1[/size]
[size=12pt]
log-adjacency-changes[/size]
[size=12pt]
network 3.3.0.0 0.0.255.255 area 1[/size]
[size=12pt]
network 13.1.1.0 0.0.0.255 area 1[/size]
[align=left][size=12pt] [/size][/align]
[/td][/tr][/table][align=left][size=12pt] [/size][/align]
[align=left][size=12pt] [/size][/align]
[align=left][b][font=宋体][size=12pt]测试：[/size][/font][/b][b][size=12pt][/size][/b][/align]
[align=left][b][size=12pt] [/size][/b][/align]
[font=宋体][size=12pt]没有配置[/size][/font][size=12pt]lsa type3[/size][font=宋体][size=12pt]过滤器之前[/size][/font]
[font=宋体][size=12pt]查看[/size][/font][size=12pt]r2[/size][font=宋体][size=12pt]路由表[/size][/font][size=12pt][/size]
[size=12pt]r2#sho ip route | begin Ga[/size]
[size=12pt]Gateway of last resort is not set[/size]
[size=12pt] [/size]
[size=12pt]
2.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]C
2.2.2.0 is directly connected, Loopback0[/size]
[size=12pt]
3.0.0.0/24 is subnetted, 4 subnets[/size]
[size=12pt]O IA
3.3.0.0 [110/129] via 12.1.1.1, 00:00:51, Serial2/0[/size]
[size=12pt]O IA
3.3.1.0 [110/129] via 12.1.1.1, 00:00:57, Serial2/0[/size]
[size=12pt]O IA
3.3.2.0 [110/129] via 12.1.1.1, 00:00:57, Serial2/0[/size]
[size=12pt]O IA
3.3.3.0 [110/129] via 12.1.1.1, 00:00:45, Serial2/0[/size]
[size=12pt]
12.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]C
12.1.1.0 is directly connected, Serial2/0[/size]
[size=12pt]
13.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]O IA
13.1.1.0 [110/128] via 12.1.1.1, 00:10:40, Serial2/0[/size]
[size=12pt] [/size]
[font=宋体][size=12pt]配置过滤器[/size][/font][size=12pt]
[/size][font=宋体][size=12pt]过滤掉[/size][/font][size=12pt]3.3.3[/size][size=12pt].0/24[/size]
[size=12pt]r1(config)#ip prefix-list area1-out seq 10 deny 3.3.3.0/24[/size]
[size=12pt]r1(config)#ip prefix-list area1-out seq 15 permit 0.0.0.0/0 le 32[/size]
[size=12pt]r1(config-router)#area 1 filter-list prefix area1-out out[/size]
[font=宋体][size=12pt]查看[/size][/font][size=12pt]r1[/size][font=宋体][size=12pt]的数据库[/size][/font][size=12pt]area 0[/size][font=宋体][size=12pt]中[/size][/font][size=12pt]
[/size][font=宋体][size=12pt]没有[/size][/font][size=12pt]3.3.3[/size][size=12pt].3[/size]
[size=12pt]1#sho ip os da[/size]
[size=12pt] [/size]
[size=12pt]
OSPF Router with ID (1.1.1.1) (Process ID 1)[/size]
[size=12pt] [/size]
[size=12pt]
Router Link States (Area 0)[/size]
[size=12pt] [/size]
[size=12pt]Link ID
ADV Router
Age
Seq#
Checksum Link count[/size]
[size=12pt]1.1.1[/size][size=12pt].1
1.1.1.1
11
0x80000006 0x00F080 2[/size]
[size=12pt]2.2.2[/size][size=12pt].2
2.2.2.2
1909
0x80000004 0x0091DD 2[/size]
[size=12pt] [/size]
[size=12pt]
Summary Net Link States (Area 0)[/size]
[size=12pt] [/size]
[size=12pt]Link ID
ADV Router
Age
Seq#
Checksum[/size]
[size=12pt]3.3.0[/size][size=12pt].0
1.1.1.1
406
0x80000004 0x00A648[/size]
[size=12pt]3.3.1[/size][size=12pt].0
1.1.1.1
411
0x80000001 0x00A14F[/size]
[size=12pt]3.3.2[/size][size=12pt].0
1.1.1.1
411
0x80000001 0x009659[/size]
[size=12pt]13.1.1[/size][size=12pt].0
1.1.1.1
11
0x80000004 0x0027BF[/size]
[size=12pt] [/size]
[font=宋体][size=12pt]查看[/size][/font][size=12pt]r2[/size][font=宋体][size=12pt]的路由表[/size][/font][size=12pt]
[/size][font=宋体][size=12pt]没有[/size][/font][size=12pt]3.3.3[/size][size=12pt].0/24[/size][font=宋体][size=12pt]的条目[/size][/font][size=12pt][/size]
[size=12pt]r2#sho ip route | begin Ga[/size]
[size=12pt]Gateway of last resort is not set[/size]
[size=12pt]
[/size]
[size=12pt]
2.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]C
2.2.2.0 is directly connected, Loopback0[/size]
[size=12pt]
3.0.0.0/24 is subnetted, 3 subnets[/size]
[size=12pt]O IA
3.3.0.0 [110/129] via 12.1.1.1, 00:07:55, Serial2/0[/size]
[size=12pt]O IA
3.3.1.0 [110/129] via 12.1.1.1, 00:08:01, Serial2/0[/size]
[size=12pt]O IA
3.3.2.0 [110/129] via 12.1.1.1, 00:08:01, Serial2/0[/size]
[size=12pt]
12.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]C
12.1.1.0 is directly connected, Serial2/0[/size]
[size=12pt]
13.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]O IA
13.1.1.0 [110/128] via 12.1.1.1, 00:17:45, Serial2/0[/size]
[size=12pt] [/size]
[font=宋体][size=12pt]－－－－－－－－－－－－－－－－－－－－－－－－－－[/size][/font][size=12pt][/size]
[font=宋体][size=12pt]以下检验[/size][/font][size=12pt]area range[/size][font=宋体][size=12pt]与[/size][/font][size=12pt]lsa [/size][font=宋体][size=12pt]类型[/size][/font][size=12pt]3 [/size][font=宋体][size=12pt]过滤器之间的联系[/size][/font][size=12pt] [/size]
[size=12pt]If the area range command has been configured for this area, type 3 LSAs that correspond to the area range are sent to all other areas, only if at least one prefix in the area range matches an entry in the prefix list. If all specific prefixes are denied by the prefix list, type 3 LSAs that correspond to the area range command will not be sent to any other area. Prefixes that are not permitted by
[/size]
[size=12pt]the prefix list are implicitly denied.――[/size][font=宋体][size=12pt]载自文档[/size][/font][size=12pt][/size]
[font=宋体][size=12pt]在[/size][/font][size=12pt]R1[/size][font=宋体][size=12pt]做汇总[/size][/font][size=12pt][/size]
[size=12pt]r1(config-router)#area 1 range 3.3.0.0 255.255.252.0[/size]
[size=12pt] [/size]
[size=12pt]r2#sho ip route | be Ga[/size]
[size=12pt]Gateway of last resort is not set[/size]
[size=12pt]
2.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]C
2.2.2.0 is directly connected, Loopback0[/size]
[size=12pt]
3.0.0.0/22 is subnetted, 1 subnets[/size]
[size=12pt]O IA
3.3.0.0 [110/129] via 12.1.1.1, 00:04:31, Serial2/0[/size]
[size=12pt]
12.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]C
12.1.1.0 is directly connected, Serial2/0[/size]
[size=12pt]
13.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]O IA
13.1.1.0 [110/128] via 12.1.1.1, 00:23:50, Serial2/0[/size]
[size=12pt] [/size]
[font=宋体][size=12pt]在[/size][/font][size=12pt]r1[/size][font=宋体][size=12pt]上增加几句[/size][/font][size=12pt] prefix-list[/size][font=宋体][size=12pt]把[/size][/font][size=12pt]3.3.0[/size][size=12pt].0[/size][font=宋体][size=12pt]所有网段都排除[/size][/font][size=12pt][/size]
[size=12pt]r1(config)#ip prefix-list area1-out seq 11 deny 3.3.0.0/24[/size]
[size=12pt]r1(config)#ip prefix-list area1-out seq 12 deny 3.3.1.0/24[/size]
[size=12pt]r1(config)#ip prefix-list area1-out seq 13 deny 3.3.2.0/24[/size]
[size=12pt] [/size]
[font=宋体][size=12pt]查看[/size][/font][size=12pt]r2[/size][font=宋体][size=12pt]路由表，那条汇总路由[/size][/font][size=12pt]3.0.0[/size][size=12pt].0/22 [/size][font=宋体][size=12pt]没有了[/size][/font][size=12pt][/size]
[size=12pt]r2#sho ip route | be Ga[/size]
[size=12pt]Gateway of last resort is not set[/size]
[size=12pt] [/size]
[size=12pt]
2.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]C
2.2.2.0 is directly connected, Loopback0[/size]
[size=12pt]
12.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]C
12.1.1.0 is directly connected, Serial2/0[/size]
[size=12pt]
13.0.0.0/24 is subnetted, 1 subnets[/size]
[size=12pt]O IA
13.1.1.0 [110/128] via 12.1.1.1, 00:31:35, Serial2/0[/size]
[font=宋体][size=12pt]结论：如果所有明细的路由都被禁止了，汇总也会没掉[/size][/font]
[/td][/tr][/table]
心依 2007-12-8 23:29
怎么都是实验,就这个结论：如果所有明细的路由都被禁止了，汇总也会没掉
