目次
概要
広域イーサネットで相互接続している4拠点の社内ネットワークにおいて、OSPFによるルーティングを行う演習です。Part3では、小規模な拠点をスタブエリアとしてLSDBを最適化します。
Part1:OSPFの基本設定
Part2:デフォルトルートの生成
Part3:スタブエリア
Part4:ルート集約
Part5:トラブルシューティング
ネットワーク構成
設定条件
Part1:OSPFの基本設定
- 図 ルーティングプロトコルの構成のように、OSPFおよびRIPv2の設定を行います。OSPFルータのルータIDは、YY.YY.YY.YY(YY:ルータ番号)とします。また、将来的なギガビットイーサネット導入に対応できるように設定します。
- 不要なインタフェースにはルーティングプロトコルのパケットを送信しないようにします。
- R42では、RIPv2のルートをOSPFへ再配送します。また、R42はR43へRIPv2でデフォルトルートをアドバタイズします。
- 10.0.0.0/24上では、R11がDR、R12がBDRとなるようにします。また、MD5によるネイバー認証を行い、ネイバーの障害検出を4秒以内にできるようにします。
Part2デフォルトルートの生成 -> このページで設定
- R13、R14でインターネットへルーティングするためのデフォルトルートをスタティックで設定します。
- R13、R14でOSPFドメインにデフォルトルートを生成します。インターネットへのルーティングはR13を優先します。
Part3:スタブエリアの設定 -> このページで設定
- エリア2、エリア4にはLSAタイプ5をアドバタイズしないように設定します。エリア4にはインターネットへの接続性を確保するために、デフォルトルートをアドバタイズできるようにします。
- エリア3のLSDBのサイズが最も小さくなるように設定します。
Part4:ルート集約
- エリア1、エリア2、エリア3、エリア4のネットワークアドレスを集約してバックボーンエリアにアドバタイズします。
- RIPv2ドメインのルートを集約してOSPFドメインへアドバタイズします。
初期設定
「演習:実践的なOSPFルーティング Part2」完了時点から開始します。
R11 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R11 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.1.11.11 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.11 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 255 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.1.1.11 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 11.11.11.11 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.1.0.0 0.0.255.255 area 1 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R12 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R12 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.1.12.12 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.12 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 100 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.1.1.12 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 12.12.12.12 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.1.0.0 0.0.255.255 area 1 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R13 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R13 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.1.13.13 255.255.255.255 ! interface FastEthernet0/0 ip address 10.1.2.13 255.255.255.0 ip nat inside ip virtual-reassembly duplex auto speed auto ! interface FastEthernet1/0 ip address 10.1.1.13 255.255.255.0 ip nat inside ip virtual-reassembly duplex auto speed auto ! interface Serial2/0 ip address 100.1.0.1 255.255.255.252 ip nat outside ip virtual-reassembly serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 13.13.13.13 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.1.0.0 0.0.255.255 area 1 default-information originate metric-type 1 ! ip http server ip forward-protocol nd ip route 0.0.0.0 0.0.0.0 100.1.0.2 ! ! ip nat inside source list 1 interface Serial2/0 overload ! access-list 1 permit 10.0.0.0 0.255.255.255 access-list 1 permit 172.16.0.0 0.0.255.255 ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R14 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R14 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.1.14.14 255.255.255.255 ! interface FastEthernet0/0 ip address 10.1.3.14 255.255.255.0 ip nat inside ip virtual-reassembly duplex auto speed auto ! interface FastEthernet1/0 ip address 10.1.1.14 255.255.255.0 ip nat inside ip virtual-reassembly duplex auto speed auto ! interface Serial2/0 ip address 100.1.0.5 255.255.255.252 ip nat outside ip virtual-reassembly serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 14.14.14.14 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.1.0.0 0.0.255.255 area 1 default-information originate ! ip http server ip forward-protocol nd ip route 0.0.0.0 0.0.0.0 100.1.0.6 ! ! ip nat inside source list 1 interface Serial2/0 overload ! access-list 1 permit 10.0.0.0 0.255.255.255 access-list 1 permit 172.16.0.0 0.0.255.255 ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R21 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R21 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.2.21.21 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.21 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.2.1.21 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 21.21.21.21 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.2.0.0 0.0.255.255 area 2 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R22 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R22 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.2.22.22 255.255.255.255 ! interface FastEthernet0/0 ip address 10.2.2.22 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.2.1.22 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 22.22.22.22 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.2.0.0 0.0.255.255 area 2 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R23 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R23 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.2.23.23 255.255.255.255 ! interface FastEthernet0/0 ip address 10.2.3.23 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.2.1.23 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 23.23.23.23 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.2.0.0 0.0.255.255 area 2 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R31 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R31 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.3.31.31 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.31 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.3.1.31 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 23.23.23.23 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.2.0.0 0.0.255.255 area 2 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R41 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R41 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.4.41.41 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.41 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.4.1.41 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 41.41.41.41 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.4.0.0 0.0.255.255 area 4 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R42 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R42 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.4.42.42 255.255.255.0 ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet1/0 ip address 10.4.1.42 255.255.255.0 duplex auto speed auto ! interface Serial2/0 ip address 172.16.0.42 255.255.255.0 serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 42.42.42.42 log-adjacency-changes auto-cost reference-bandwidth 3000 redistribute rip subnets passive-interface Loopback0 network 10.4.0.0 0.0.255.255 area 4 ! router rip version 2 network 172.16.0.0 default-information originate ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R43 Initial Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R43 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.4.43.43 255.255.255.255 ! interface Loopback1 ip address 172.16.2.43 255.255.255.0 secondary ip address 172.16.1.43 255.255.255.0 ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet1/0 no ip address shutdown duplex auto speed auto ! interface Serial2/0 ip address 172.16.0.43 255.255.255.0 serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router rip version 2 passive-interface default no passive-interface Serial2/0 network 172.16.0.0 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
ISP Initial Configuration (Click)
! ! ! ! ! ! ! ! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname ISP ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 100.1.1.1 255.255.255.0 ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet1/0 no ip address shutdown duplex auto speed auto ! interface Serial2/0 ip address 100.1.0.2 255.255.255.252 serial restart-delay 0 ! interface Serial2/1 ip address 100.1.0.6 255.255.255.252 serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
設定と確認 Part3:スタブエリア
Step1:エリア2のLSDBの確認
エリア2にLSAタイプ5をアドバタイズしないようにするためには、エリア2をスタブエリアとして設定します。スタブエリアの設定にともなうLSDBの変化を確認するために、現在のエリア2のLSDBを確認します。そのために、R22でshow ip ospf databaseコマンドを実行します。
R22 show ip ospf database
R22#show ip ospf database
OSPF Router with ID (22.22.22.22) (Process ID 1)
Router Link States (Area 2)
Link ID ADV Router Age Seq# Checksum Link count
21.21.21.21 21.21.21.21 1001 0x80000039 0x005A4C 2
22.22.22.22 22.22.22.22 1708 0x80000038 0x0078E8 3
23.23.23.23 23.23.23.23 1632 0x80000038 0x007ADA 3
Net Link States (Area 2)
Link ID ADV Router Age Seq# Checksum
10.2.1.23 23.23.23.23 1632 0x80000037 0x00DA9B
Summary Net Link States (Area 2)
Link ID ADV Router Age Seq# Checksum
10.0.0.0 21.21.21.21 1001 0x80000035 0x005339
10.1.1.0 21.21.21.21 1001 0x80000035 0x006903
10.1.2.0 21.21.21.21 1001 0x80000035 0x008BC1
10.1.3.0 21.21.21.21 1001 0x80000035 0x0080CB
10.1.11.11 21.21.21.21 1001 0x80000035 0x00690B
10.1.12.12 21.21.21.21 1001 0x80000035 0x00541E
10.1.13.13 21.21.21.21 1001 0x80000035 0x006CE5
10.1.14.14 21.21.21.21 1001 0x80000035 0x0057F8
10.3.1.0 21.21.21.21 1001 0x80000035 0x005119
10.3.31.31 21.21.21.21 1001 0x80000035 0x00AB9E
10.4.1.0 21.21.21.21 1001 0x80000035 0x004524
10.4.41.41 21.21.21.21 1001 0x80000035 0x00CC68
10.4.42.42 21.21.21.21 1001 0x80000035 0x00E430
Summary ASB Link States (Area 2)
Link ID ADV Router Age Seq# Checksum
13.13.13.13 21.21.21.21 1747 0x80000017 0x00D888
14.14.14.14 21.21.21.21 1747 0x80000017 0x00AAB2
42.42.42.42 21.21.21.21 1001 0x80000035 0x00616D
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
0.0.0.0 13.13.13.13 1540 0x80000017 0x0004E4 1
0.0.0.0 14.14.14.14 1346 0x80000017 0x0069FA 1
172.16.0.0 42.42.42.42 884 0x80000036 0x0007FE 0
172.16.1.0 42.42.42.42 884 0x80000036 0x00FB09 0
172.16.2.0 42.42.42.42 884 0x80000036 0x00F013 0
エリア2のLSDBには、LSAタイプ4およびLSAタイプ5が含まれていることがわかります。
Step2:エリア2のスタブエリアの設定
エリア2にLSAタイプ5をアドバタイズしないように、R21～R23でスタブエリアの設定を行います。
R21/R22/R23 スタブエリアの設定
router ospf 1 area 2 stub
Step3:エリア2のLSDBの確認
エリア2をスタブエリアにしたあとのLSDBを確認します。R22では、次のような出力になります。
R22 show ip ospf database
R22#show ip ospf database
OSPF Router with ID (22.22.22.22) (Process ID 1)
Router Link States (Area 2)
Link ID ADV Router Age Seq# Checksum Link count
21.21.21.21 21.21.21.21 75 0x8000003B 0x007432 2
22.22.22.22 22.22.22.22 74 0x8000003B 0x0090CF 3
23.23.23.23 23.23.23.23 73 0x8000003B 0x0092C1 3
Net Link States (Area 2)
Link ID ADV Router Age Seq# Checksum
10.2.1.23 23.23.23.23 73 0x8000003A 0x00F282
Summary Net Link States (Area 2)
Link ID ADV Router Age Seq# Checksum
0.0.0.0 21.21.21.21 88 0x80000001 0x0039B0
10.0.0.0 21.21.21.21 88 0x80000036 0x006F1E
10.1.1.0 21.21.21.21 88 0x80000036 0x0085E7
10.1.2.0 21.21.21.21 88 0x80000036 0x00A7A6
10.1.3.0 21.21.21.21 88 0x80000036 0x009CB0
10.1.11.11 21.21.21.21 88 0x80000036 0x0085EF
10.1.12.12 21.21.21.21 89 0x80000036 0x007003
10.1.13.13 21.21.21.21 89 0x80000036 0x0088CA
10.1.14.14 21.21.21.21 89 0x80000036 0x0073DD
10.3.1.0 21.21.21.21 89 0x80000036 0x006DFD
10.3.31.31 21.21.21.21 89 0x80000036 0x00C783
10.4.1.0 21.21.21.21 89 0x80000036 0x006109
10.4.41.41 21.21.21.21 89 0x80000036 0x00E84D
10.4.42.42 21.21.21.21 89 0x80000036 0x000115
スタブエリアの設定を行うことで、エリア2のLSDBからLSAタイプ4、LSAタイプ5がなくなってしまったことがわかります。そして、外部ルートの代わりにABRであるR21(ルータID:21.21.21.21)がLSAタイプ3でデフォルトルートをアドバタイズしていることがわかります。
Step4:エリア3のLSDBの確認
エリア3のLSDBを最小化するためには、エリア3をトータリースタブエリアとして設定します。トータリースタブエリアの設定にともなうLSDBの変化を確認するために、現在のエリア3のLSDBを確認します。そのために、R31でshow ip ospf databaseコマンドを実行します。
R31 show ip ospf database
R31#show ip ospf database
OSPF Router with ID (31.31.31.31) (Process ID 1)
-- omitted --
Router Link States (Area 3)
Link ID ADV Router Age Seq# Checksum Link count
31.31.31.31 31.31.31.31 164 0x80000039 0x000573 2
Summary Net Link States (Area 3)
Link ID ADV Router Age Seq# Checksum
10.0.0.0 31.31.31.31 919 0x80000036 0x00243F
10.1.1.0 31.31.31.31 919 0x80000036 0x003A09
10.1.2.0 31.31.31.31 919 0x80000036 0x005CC7
10.1.3.0 31.31.31.31 919 0x80000036 0x0051D1
10.1.11.11 31.31.31.31 919 0x80000036 0x003A11
10.1.12.12 31.31.31.31 919 0x80000036 0x002524
10.1.13.13 31.31.31.31 919 0x80000036 0x003DEB
10.1.14.14 31.31.31.31 934 0x80000036 0x0028FE
10.2.1.0 31.31.31.31 934 0x80000036 0x002E14
10.2.2.0 31.31.31.31 1034 0x80000001 0x00BA9D
10.2.3.0 31.31.31.31 1024 0x80000001 0x00AFA7
10.2.21.21 31.31.31.31 934 0x80000036 0x005BDA
10.2.22.22 31.31.31.31 1034 0x80000001 0x00DD6D
10.2.23.23 31.31.31.31 1024 0x80000001 0x00C880
10.4.1.0 31.31.31.31 934 0x80000036 0x00162A
10.4.41.41 31.31.31.31 934 0x80000036 0x009D6E
10.4.42.42 31.31.31.31 934 0x80000036 0x00B536
Summary ASB Link States (Area 3)
Link ID ADV Router Age Seq# Checksum
13.13.13.13 31.31.31.31 934 0x80000018 0x00A98E
14.14.14.14 31.31.31.31 934 0x80000018 0x007BB8
42.42.42.42 31.31.31.31 934 0x80000036 0x003273
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
0.0.0.0 13.13.13.13 935 0x80000018 0x0002E5 1
0.0.0.0 14.14.14.14 769 0x80000018 0x0067FB 1
172.16.0.0 42.42.42.42 310 0x80000037 0x0005FF 0
172.16.1.0 42.42.42.42 310 0x80000037 0x00F90A 0
172.16.2.0 42.42.42.42 310 0x80000037 0x00EE14 0
エリア3のLSDBには、LSAタイプ3、LSAタイプ4およびLSAタイプ5が含まれていることがわかります。
Step5:エリア3のトータリースタブエリアの設定
エリア3のLSDBを最小化するためにエリア3をトータリースタブエリアとして設定します。
R31 トータリースタブエリアの設定
router ospf 1 area 3 stub no-summary
Step6:エリア3のLSDBの確認
エリア3をトータリースタブエリアにしたあとのLSDBを確認します。R31では、次のような出力になります。
R31 show ip ospf database
R31#show ip ospf database
OSPF Router with ID (31.31.31.31) (Process ID 1)
-- omitted --
Router Link States (Area 3)
Link ID ADV Router Age Seq# Checksum Link count
31.31.31.31 31.31.31.31 532 0x80000039 0x000573 2
Summary Net Link States (Area 3)
Link ID ADV Router Age Seq# Checksum
0.0.0.0 31.31.31.31 42 0x80000001 0x000CB5
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
0.0.0.0 13.13.13.13 1288 0x80000018 0x0002E5 1
0.0.0.0 14.14.14.14 1122 0x80000018 0x0067FB 1
172.16.0.0 42.42.42.42 662 0x80000037 0x0005FF 0
172.16.1.0 42.42.42.42 662 0x80000037 0x00F90A 0
172.16.2.0 42.42.42.42 662 0x80000037 0x00EE14 0
エリア3をトータリースタブエリアとすることで、エリア3のLSDBにはLSAタイプ3としてデフォルトルートを表すもののみとなっていることがわかります。
なお、R31はABRなので、LSAタイプ5も表示されています。エリア3の内部ルータであれば、LSDBにはLSAタイプ5は存在しなくなります。
Step7:エリア4のLSDBの確認
エリア4のR42はASBRです。通常のスタブエリアにはASBRを配置できません。ASBRを配置できるようにして、LSAタイプ5をアドバタイズしないようにするためには、エリア4をNSSAとして設定します。NSSAの設定にともなうLSDBの変化を確認するために、現在のエリア4のLSDBを確認します。そのために、R42でshow ip ospf databaseコマンドを実行します。
R42 show ip ospf database
R42#show ip ospf database
OSPF Router with ID (42.42.42.42) (Process ID 1)
Router Link States (Area 4)
Link ID ADV Router Age Seq# Checksum Link count
41.41.41.41 41.41.41.41 1586 0x80000039 0x00F7B8 2
42.42.42.42 42.42.42.42 1316 0x80000039 0x00DBC8 2
Net Link States (Area 4)
Link ID ADV Router Age Seq# Checksum
10.4.1.42 42.42.42.42 812 0x80000038 0x008053
Summary Net Link States (Area 4)
Link ID ADV Router Age Seq# Checksum
10.0.0.0 41.41.41.41 1586 0x80000036 0x00F644
10.1.1.0 41.41.41.41 1586 0x80000036 0x000D0E
10.1.2.0 41.41.41.41 1586 0x80000036 0x002FCC
10.1.3.0 41.41.41.41 1586 0x80000036 0x0024D6
10.1.11.11 41.41.41.41 1586 0x80000036 0x000D16
10.1.12.12 41.41.41.41 1586 0x80000036 0x00F729
10.1.13.13 41.41.41.41 1586 0x80000036 0x0010F0
10.1.14.14 41.41.41.41 1587 0x80000036 0x00FA04
10.2.1.0 41.41.41.41 1587 0x80000036 0x000119
10.2.2.0 41.41.41.41 93 0x80000002 0x008BA3
10.2.3.0 41.41.41.41 93 0x80000002 0x0080AD
10.2.21.21 41.41.41.41 1587 0x80000036 0x002EDF
10.2.22.22 41.41.41.41 93 0x80000002 0x00AE73
10.2.23.23 41.41.41.41 93 0x80000002 0x009986
10.3.1.0 41.41.41.41 1587 0x80000036 0x00F424
10.3.31.31 41.41.41.41 1587 0x80000036 0x004FA9
Summary ASB Link States (Area 4)
Link ID ADV Router Age Seq# Checksum
13.13.13.13 41.41.41.41 1843 0x80000018 0x007C93
14.14.14.14 41.41.41.41 1843 0x80000018 0x004EBD
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
0.0.0.0 13.13.13.13 1946 0x80000018 0x0002E5 1
0.0.0.0 14.14.14.14 1780 0x80000018 0x0067FB 1
172.16.0.0 42.42.42.42 1316 0x80000037 0x0005FF 0
172.16.1.0 42.42.42.42 1316 0x80000037 0x00F90A 0
172.16.2.0 42.42.42.42 1317 0x80000037 0x00EE14 0
Step8:エリア4のNSSAの設定
エリア4をNSSAとして設定します。R41がエリア4へデフォルトルートをアドバタイズできるようにarea nssa default-information originateコマンドを利用します。
R41 エリア4 NSSAの設定
router ospf 1 area 4 nssa default-information-originate
R42 エリア4 NSSAの設定
router ospf 1 area 4 nssa
Step9:エリア4のLSDBの確認
エリア4をNSSAにしたあとのLSDBを確認します。R42では、次のような出力になります。
R42 show ip ospf database
R42#show ip ospf database
OSPF Router with ID (42.42.42.42) (Process ID 1)
Router Link States (Area 4)
Link ID ADV Router Age Seq# Checksum Link count
41.41.41.41 41.41.41.41 41 0x8000003B 0x009F07 2
42.42.42.42 42.42.42.42 40 0x8000003B 0x007D1F 2
Net Link States (Area 4)
Link ID ADV Router Age Seq# Checksum
10.4.1.42 42.42.42.42 40 0x8000003A 0x0022A9
Summary Net Link States (Area 4)
Link ID ADV Router Age Seq# Checksum
10.0.0.0 41.41.41.41 61 0x80000037 0x009A99
10.1.1.0 41.41.41.41 61 0x80000037 0x00B063
10.1.2.0 41.41.41.41 61 0x80000037 0x00D222
10.1.3.0 41.41.41.41 61 0x80000037 0x00C72C
10.1.11.11 41.41.41.41 61 0x80000037 0x00B06B
10.1.12.12 41.41.41.41 61 0x80000037 0x009B7E
10.1.13.13 41.41.41.41 61 0x80000037 0x00B346
10.1.14.14 41.41.41.41 62 0x80000037 0x009E59
10.2.1.0 41.41.41.41 62 0x80000037 0x00A46E
10.2.2.0 41.41.41.41 62 0x80000003 0x002FF8
10.2.3.0 41.41.41.41 62 0x80000003 0x002403
10.2.21.21 41.41.41.41 62 0x80000037 0x00D135
10.2.22.22 41.41.41.41 62 0x80000003 0x0052C8
10.2.23.23 41.41.41.41 62 0x80000003 0x003DDB
10.3.1.0 41.41.41.41 62 0x80000037 0x009879
10.3.31.31 41.41.41.41 62 0x80000037 0x00F2FE
Type-7 AS External Link States (Area 4)
Link ID ADV Router Age Seq# Checksum Tag
0.0.0.0 41.41.41.41 62 0x80000001 0x003AD2 0
172.16.0.0 42.42.42.42 46 0x80000001 0x00EDE0 0
172.16.1.0 42.42.42.42 46 0x80000001 0x00E2EA 0
172.16.2.0 42.42.42.42 46 0x80000001 0x00D7F4 0
エリア4をNSSAとして設定することで、R41はエリア4にLSAタイプ5をアドバタイズしないようになります。また、R41はLSAタイプ7でデフォルトルートをエリア4にアドバタイズしています。
ASBRであるR42は、RIPドメインのルートをLSAタイプ7でエリア4にアドバタイズしていることがわかります。
Part3完了の設定ファイル
R11 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R11 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.1.11.11 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.11 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 255 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.1.1.11 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 11.11.11.11 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.1.0.0 0.0.255.255 area 1 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R12 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R12 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.1.12.12 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.12 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 100 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.1.1.12 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 12.12.12.12 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.1.0.0 0.0.255.255 area 1 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R13 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R13 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.1.13.13 255.255.255.255 ! interface FastEthernet0/0 ip address 10.1.2.13 255.255.255.0 ip nat inside ip virtual-reassembly duplex auto speed auto ! interface FastEthernet1/0 ip address 10.1.1.13 255.255.255.0 ip nat inside ip virtual-reassembly duplex auto speed auto ! interface Serial2/0 ip address 100.1.0.1 255.255.255.252 ip nat outside ip virtual-reassembly serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 13.13.13.13 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.1.0.0 0.0.255.255 area 1 default-information originate metric-type 1 ! ip http server ip forward-protocol nd ip route 0.0.0.0 0.0.0.0 100.1.0.2 ! ! ip nat inside source list 1 interface Serial2/0 overload ! access-list 1 permit 10.0.0.0 0.255.255.255 access-list 1 permit 172.16.0.0 0.0.255.255 ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R14 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R14 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.1.14.14 255.255.255.255 ! interface FastEthernet0/0 ip address 10.1.3.14 255.255.255.0 ip nat inside ip virtual-reassembly duplex auto speed auto ! interface FastEthernet1/0 ip address 10.1.1.14 255.255.255.0 ip nat inside ip virtual-reassembly duplex auto speed auto ! interface Serial2/0 ip address 100.1.0.5 255.255.255.252 ip nat outside ip virtual-reassembly serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 14.14.14.14 log-adjacency-changes auto-cost reference-bandwidth 3000 passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.1.0.0 0.0.255.255 area 1 default-information originate ! ip http server ip forward-protocol nd ip route 0.0.0.0 0.0.0.0 100.1.0.6 ! ! ip nat inside source list 1 interface Serial2/0 overload ! access-list 1 permit 10.0.0.0 0.255.255.255 access-list 1 permit 172.16.0.0 0.0.255.255 ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R21 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R21 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.2.21.21 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.21 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.2.1.21 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 21.21.21.21 log-adjacency-changes auto-cost reference-bandwidth 3000 area 2 stub passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.2.0.0 0.0.255.255 area 2 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R22 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R22 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.2.22.22 255.255.255.255 ! interface FastEthernet0/0 ip address 10.2.2.22 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.2.1.22 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 22.22.22.22 log-adjacency-changes auto-cost reference-bandwidth 3000 area 2 stub passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.2.0.0 0.0.255.255 area 2 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R23 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R23 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.2.23.23 255.255.255.255 ! interface FastEthernet0/0 ip address 10.2.3.23 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.2.1.23 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 23.23.23.23 log-adjacency-changes auto-cost reference-bandwidth 3000 area 2 stub passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.2.0.0 0.0.255.255 area 2 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R31 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R31 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.3.31.31 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.31 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.3.1.31 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 23.23.23.23 log-adjacency-changes auto-cost reference-bandwidth 3000 area 3 stub no-summary passive-interface FastEthernet0/0 passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.2.0.0 0.0.255.255 area 2 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R41 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R41 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.4.41.41 255.255.255.255 ! interface FastEthernet0/0 ip address 10.0.0.41 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ip ospf hello-interval 1 ip ospf priority 0 duplex auto speed auto ! interface FastEthernet1/0 ip address 10.4.1.41 255.255.255.0 duplex auto speed auto ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 41.41.41.41 log-adjacency-changes auto-cost reference-bandwidth 3000 area 4 nssa default-information-originate passive-interface Loopback0 network 10.0.0.0 0.0.0.255 area 0 network 10.4.0.0 0.0.255.255 area 4 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R42 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R42 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.4.42.42 255.255.255.0 ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet1/0 ip address 10.4.1.42 255.255.255.0 duplex auto speed auto ! interface Serial2/0 ip address 172.16.0.42 255.255.255.0 serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router ospf 1 router-id 42.42.42.42 log-adjacency-changes auto-cost reference-bandwidth 3000 area 4 nssa redistribute rip subnets passive-interface Loopback0 network 10.4.0.0 0.0.255.255 area 4 ! router rip version 2 network 172.16.0.0 default-information originate ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
R43 Completed Configuration (Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R43 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 10.4.43.43 255.255.255.255 ! interface Loopback1 ip address 172.16.2.43 255.255.255.0 secondary ip address 172.16.1.43 255.255.255.0 ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet1/0 no ip address shutdown duplex auto speed auto ! interface Serial2/0 ip address 172.16.0.43 255.255.255.0 serial restart-delay 0 ! interface Serial2/1 no ip address shutdown serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! router rip version 2 passive-interface default no passive-interface Serial2/0 network 172.16.0.0 ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
ISP Completed Configuration (Click)
! ! ! ! ! ! ! ! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname ISP ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 100.1.1.1 255.255.255.0 ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet1/0 no ip address shutdown duplex auto speed auto ! interface Serial2/0 ip address 100.1.0.2 255.255.255.252 serial restart-delay 0 ! interface Serial2/1 ip address 100.1.0.6 255.255.255.252 serial restart-delay 0 ! interface Serial2/2 no ip address shutdown serial restart-delay 0 ! interface Serial2/3 no ip address shutdown serial restart-delay 0 ! ! ip http server ip forward-protocol nd ! ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! ! end
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- OSPFルータのルータIDが重複してしまったら？
- OSPF ネイバーとアジャセンシー
- OSPF DR/BDR
- イーサネット上のshow ip ospf neighborの見え方
- OSPFネットワークタイプ ～OSPFが有効なインタフェースの分類～
- OSPF LSDBの同期処理
- 大規模なOSPFネットワークの問題点
- OSPFエリア ～エリア内は詳しく、エリア外は概要だけ～
- OSPFルータの種類
- OSPF LSAの種類
- OSPF エリアの種類
- OSPFの基本的な設定と確認コマンド [Cisco]
- インタフェースでOSPFを有効化することの詳細
- OSPF ループバックインタフェースのアドバタイズ
- OSPF Hello/Deadインターバルの設定と確認コマンド
- OSPFコストの設定と確認
- OSPFルータプライオリティの設定と確認コマンド
- OSPFネイバー認証の設定 ～正規のルータとのみネイバーになる～
- バーチャルリンク上のネイバー認証
- OSPF スタブエリアの設定と確認[Cisco]
- OSPF スタブエリアの設定例 [Cisco]
- OSPFデフォルトルートの生成 ～default-information originateコマンド～
- OSPFデフォルトルートの生成 ～スタブエリア～
- OSPF バーチャルリンク ～仮想的なエリア0のポイントツーポイントリンク～
- OSPF バーチャルリンクの設定と確認 [Cisco]
- OSPF バーチャルリンクの設定例 [Cisco]
- OSPF 不連続バックボーンのVirtual-link設定例
- OSPFのルート集約と設定
- OSPFルート集約の設定例(Cisco)
- OSPF ルート種類による優先順位
- OSPFネイバーの状態がExstartでスタックする原因
- OSPFパケットの種類とOSPFヘッダフォーマット
- OSPF Helloパケット
- OSPF DD(Database Description)パケット
- OSPF LSR(Link State Request)パケット
- OSPF LSU(Link State Update)パケット
- OSPF LSAck(Link State Acknowledgement)パケット
- OSPF 再配送ルートの制限 ～redistribute maximum-prefixコマンド～
- OSPFでのディストリビュートリスト/プレフィクスリストの動作
- OSPFでのディストリビュートリストの設定例 Part1
- OSPFでのディストリビュートリストの設定例 Part2
- OSPFのLSAフィルタの概要 ～LSAタイプ3/タイプ5をフィルタ～
- LSAタイプ3のフィルタ設定例
- LSAタイプ5のフィルタ設定例
- 3階層モデルLANのOSPFルーティング
- 演習:実践的なOSPFルーティング Part1:OSPFの基本設定
- 演習:実践的なOSPFルーティング Part2:デフォルトルートの生成
- 演習:実践的なOSPFルーティング Part3:スタブエリア
- 演習:実践的なOSPFルーティング Part4:ルート集約
- 演習:実践的なOSPFルーティング Part5:トラブルシューティング
- OSPF 設定ミスの切り分けと修正 Part1
- OSPF 設定ミスの切り分けと修正 Part2
- OSPF 設定ミスの切り分けと修正 Part3
- OSPF 設定ミスの切り分けと修正 Part4
- OSPF 設定ミスの切り分けと修正 Part5
- OSPF 設定ミスの切り分けと修正 Part6
- Cisco OSPFv3 for IPv4の設定と確認コマンド
- Cisco OSPFv3 for IPv4の設定例
- OSPFv3の設定例 [Cisco]
- OSPFv3 ルート集約の設定例 [Cisco]