目次
概要
複数のASでBGPによるルーティングを行う演習です。Part2では、各AS内のBGPルートを集約します。そのときに、集約ルートのアトリビュートや集約前のルートのアドバタイズを制御します。
Part1:BGP基本設定
Part2:ルート集約
Part3:ポリシーベースルーティング
Part4:トラブルシューティング
ネットワーク構成
![図 [演習]BGP応用 論理構成](https://www.n-study.com/wp-content/uploads/2023/03/bgp-advanced-configuration-exercises-part1-01.png)
![図 [演習]BGP応用 AS構成](https://www.n-study.com/wp-content/uploads/2023/03/bgp-advanced-configuration-exercises-part1-02.png)
| 機器 | AS内のネットワークアドレス |
|---|---|
| R11 Lo1 | 110.1.1.0/24 |
| R12 Lo1 | 110.1.2.0/24 |
| R13 Lo1 | 110.1.3.0/24 |
| R14 Lo1 | 110.1.4.0/24 |
| R15 Lo1 | 110.1.5.0/24 |
| R16 Lo1 | 110.1.6.0/24 |
| R21 Lo1 | 120.1.1.0/24 |
| R22 Lo1 | 120.1.2.0/24 |
| R23 Lo1 | 120.1.3.0/24 |
| R31 Lo1 | 130.1.1.0/24 130.1.2.0/24 130.1.3.0/24 |
| R41 Lo1 | 140.1.1.0/24 140.1.2.0/24 140.1.3.0/24 |
| R51 Lo1 | 150.1.1.0/24 150.1.2.0/24 150.1.3.0/24 |
設定条件
Part1:BGP基本設定
- R11/R13/R15でAS65100を構成します。また、R12/R14/R16でAS65200を構成します。AS65100、AS65200は他のASから見るとAS110として動作します。R11～R16の間のBGPネイバーはすべてLoopback0のIPアドレスを利用して確立します。AS65100とAS65200間はR13とR14でネイバーを確立します。
- R11/R15、R12/R16ではIBGPネイバーの設定を1つだけしか行なってはいけません。
- R21/R22/R23でAS120を構成します。AS120内のBGPネイバーはすべてLoopback0のIPアドレスを利用して確立します。
- R31でAS130を構成します。R41でAS140を構成します。R51でAS150を構成します。
- AS間は、直接接続のIPアドレスを利用してEBGPネイバーを確立します。EBGPネイバーはすべてネイバー認証を行います。ネイバー認証のパスワードは「cisco」とします。
- AS110内のネットワークアドレス 110.1.1.0/24～110.1.6.0/24をR11～R16のそれぞれのルータでnetworkコマンドを利用してBGPルートとして生成します。同様にAS130、AS140、AS150においてもAS内のネットワークアドレスをnetworkコマンドによってBGPルートとして生成します。
- R21とR22でAS120内のネットワークアドレスをBGPルートとして生成します。ただし、networkコマンドを利用してはいけません。パスアトリビュートはnetworkコマンドを利用した場合と同等にします。
Part2:ルート集約 → このページで設定
- AS110内のBGPルートを可能なかぎり長いサブネットマスクで集約します。集約ルートとともに第3オクテットが偶数である集約前のBGPルートもアドバタイズします。
- AS120内のBGPルートを可能な限り長いサブネットマスクで集約します。ネイバーには集約ルートのみをアドバタイズします。
- AS130内のBGPルートを可能な限り長いサブネットマスクで集約します。ネイバーには集約ルートのみをアドバタイズします。また、集約ルートにはCOMMUNITYアトリビュート「130:1」を付加します。
- AS140内のBGPルートを可能な限り長いサブネットマスクで集約します。R51にだけ集約ルートとともに140.1.2.0/24のBGPルートもアドバタイズします。
- AS150内のBGPルートをR31/R41で集約します。集約ルートのAS_PATHアトリビュートにAS150の情報が含まれるようにします。
Part3:ポリシーベースルーティング
- AS150の先にAS151およびAS152が接続されているようにAS構成をエミュレートします。AS151には、151.1.1.0/24が含まれています。AS152には、152.1.1.0/24が含まれています。これらのルートはR51でLoopback2インタフェースを利用するものとします。
- AS110からAS151へパケットをルーティングするときにはR15を経由するようにします。また、AS110からAS152へパケットをルーティングするときにはR16を経由するようにします。
- AS110の集約前のルートは、AS150にアドバタイズされないようにします。ただし、このための設定はAS110のルータでのみ行います。
- AS120にパケットをルーティングするときにはR21を経由するようにします。このための設定はAS120のルータでのみ行います。
初期設定
「[演習]BGP応用 Part1:BGP基本設定」完了時点から開始します。
R11 Initical 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 192.168.0.11 255.255.255.255 ! interface Loopback1 ip address 110.1.1.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.1.11 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.1.11 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 11.11.11.11 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65100 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 network 110.1.1.0 mask 255.255.255.0 neighbor 1.1.1.21 remote-as 120 neighbor 1.1.1.21 password cisco neighbor 192.168.0.13 remote-as 65100 neighbor 192.168.0.13 update-source Loopback0 neighbor 192.168.0.13 next-hop-self no auto-summary ! 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 Initical 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 192.168.0.12 255.255.255.255 ! interface Loopback1 ip address 110.1.2.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.2.12 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.1.12 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 12.12.12.12 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65200 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 network 110.1.2.0 mask 255.255.255.0 neighbor 1.1.2.22 remote-as 120 neighbor 1.1.2.22 password cisco neighbor 192.168.0.14 remote-as 65200 neighbor 192.168.0.14 update-source Loopback0 neighbor 192.168.0.14 next-hop-self no auto-summary ! 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 Initical 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 192.168.0.13 255.255.255.255 ! interface Loopback1 ip address 110.1.3.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 192.168.1.13 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.2.13 255.255.255.0 duplex auto speed auto ! interface FastEthernet2/0 ip address 192.168.3.13 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 13.13.13.13 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65100 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 bgp confederation peers 65200 network 110.1.3.0 mask 255.255.255.0 neighbor 192.168.0.11 remote-as 65100 neighbor 192.168.0.11 update-source Loopback0 neighbor 192.168.0.11 route-reflector-client neighbor 192.168.0.14 remote-as 65200 neighbor 192.168.0.14 ebgp-multihop 255 neighbor 192.168.0.14 update-source Loopback0 neighbor 192.168.0.15 remote-as 65100 neighbor 192.168.0.15 update-source Loopback0 neighbor 192.168.0.15 route-reflector-client no auto-summary ! 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
R14 Initical 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 192.168.0.14 255.255.255.255 ! interface Loopback1 ip address 110.1.4.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 192.168.1.14 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.2.14 255.255.255.0 duplex auto speed auto ! interface FastEthernet2/0 ip address 192.168.3.14 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 14.14.14.14 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65200 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 bgp confederation peers 65100 network 110.1.4.0 mask 255.255.255.0 neighbor 192.168.0.12 remote-as 65200 neighbor 192.168.0.12 update-source Loopback0 neighbor 192.168.0.12 route-reflector-client neighbor 192.168.0.13 remote-as 65100 neighbor 192.168.0.13 ebgp-multihop 255 neighbor 192.168.0.13 update-source Loopback0 neighbor 192.168.0.16 remote-as 65200 neighbor 192.168.0.16 update-source Loopback0 neighbor 192.168.0.16 route-reflector-client no auto-summary ! 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
R15 Initical Configuration(Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R15 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 192.168.0.15 255.255.255.255 ! interface Loopback1 ip address 110.1.5.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.3.15 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.2.15 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 15.15.15.15 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65100 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 network 110.1.5.0 mask 255.255.255.0 neighbor 1.1.3.31 remote-as 130 neighbor 1.1.3.31 password cisco neighbor 192.168.0.13 remote-as 65100 neighbor 192.168.0.13 update-source Loopback0 neighbor 192.168.0.13 next-hop-self no auto-summary ! 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
R16 Initical Configuration(Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R16 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 192.168.0.16 255.255.255.255 ! interface Loopback1 ip address 110.1.6.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.4.16 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.2.16 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 16.16.16.16 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65200 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 network 110.1.6.0 mask 255.255.255.0 neighbor 1.1.4.41 remote-as 140 neighbor 1.1.4.41 password cisco neighbor 192.168.0.14 remote-as 65200 neighbor 192.168.0.14 update-source Loopback0 neighbor 192.168.0.14 next-hop-self no auto-summary ! 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
R21 Initical 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 172.16.0.21 255.255.255.255 ! interface Loopback1 ip address 120.1.1.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.1.21 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 172.16.1.21 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 21.21.21.21 log-adjacency-changes network 120.1.0.0 0.0.255.255 area 0 network 172.16.0.0 0.0.255.255 area 0 ! router bgp 120 no synchronization bgp log-neighbor-changes redistribute ospf 1 route-map AS120 neighbor 1.1.1.11 remote-as 110 neighbor 1.1.1.11 password cisco neighbor 172.16.0.22 remote-as 120 neighbor 172.16.0.22 update-source Loopback0 neighbor 172.16.0.22 next-hop-self neighbor 172.16.0.23 remote-as 120 neighbor 172.16.0.23 update-source Loopback0 neighbor 172.16.0.23 next-hop-self no auto-summary ! ip http server ip forward-protocol nd ! ! ! access-list 1 permit 120.1.0.0 0.0.255.255 ! route-map AS120 permit 10 match ip address 1 set origin igp ! ! ! 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 Initical 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 172.16.0.22 255.255.255.255 ! interface Loopback1 ip address 120.1.2.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.2.22 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 172.16.2.22 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 22.22.22.22 log-adjacency-changes network 120.1.0.0 0.0.255.255 area 0 network 172.16.0.0 0.0.255.255 area 0 ! router bgp 120 no synchronization bgp log-neighbor-changes redistribute ospf 1 route-map AS120 neighbor 1.1.2.12 remote-as 110 neighbor 1.1.2.12 password cisco neighbor 172.16.0.21 remote-as 120 neighbor 172.16.0.21 update-source Loopback0 neighbor 172.16.0.21 next-hop-self neighbor 172.16.0.23 remote-as 120 neighbor 172.16.0.23 update-source Loopback0 neighbor 172.16.0.23 next-hop-self no auto-summary ! ip http server ip forward-protocol nd ! ! ! access-list 1 permit 120.1.0.0 0.0.255.255 ! route-map AS120 permit 10 match ip address 1 set origin igp ! ! ! 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 Initical 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 172.16.0.23 255.255.255.255 ! interface Loopback1 ip address 120.1.3.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 172.16.1.23 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 172.16.2.23 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 23.23.23.23 log-adjacency-changes network 120.1.0.0 0.0.255.255 area 0 network 172.16.0.0 0.0.255.255 area 0 ! router bgp 120 no synchronization bgp log-neighbor-changes neighbor 172.16.0.21 remote-as 120 neighbor 172.16.0.21 update-source Loopback0 neighbor 172.16.0.22 remote-as 120 neighbor 172.16.0.22 update-source Loopback0 no auto-summary ! 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 Initical 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 Loopback1 ip address 130.1.3.1 255.255.255.0 secondary ip address 130.1.2.1 255.255.255.0 secondary ip address 130.1.1.1 255.255.255.0 ! interface FastEthernet0/0 ip address 1.1.3.31 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 1.1.5.31 255.255.255.0 duplex auto speed auto ! ! router bgp 130 no synchronization bgp log-neighbor-changes network 130.1.1.0 mask 255.255.255.0 network 130.1.2.0 mask 255.255.255.0 network 130.1.3.0 mask 255.255.255.0 neighbor 1.1.3.15 remote-as 110 neighbor 1.1.3.15 password cisco neighbor 1.1.5.51 remote-as 150 neighbor 1.1.5.51 password cisco no auto-summary ! 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 Initical 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 Loopback1 ip address 140.1.3.1 255.255.255.0 secondary ip address 140.1.2.1 255.255.255.0 secondary ip address 140.1.1.1 255.255.255.0 ! interface FastEthernet0/0 ip address 1.1.4.41 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 1.1.6.41 255.255.255.0 duplex auto speed auto ! ! router bgp 140 no synchronization bgp log-neighbor-changes network 140.1.1.0 mask 255.255.255.0 network 140.1.2.0 mask 255.255.255.0 network 140.1.3.0 mask 255.255.255.0 neighbor 1.1.4.16 remote-as 110 neighbor 1.1.4.16 password cisco neighbor 1.1.6.51 remote-as 150 neighbor 1.1.6.51 password cisco no auto-summary ! 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
R51 Initical Configuration(Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R51 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback1 ip address 150.1.2.1 255.255.255.0 secondary ip address 150.1.3.1 255.255.255.0 secondary ip address 150.1.1.1 255.255.255.0 ! interface FastEthernet0/0 ip address 1.1.5.51 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 1.1.6.51 255.255.255.0 duplex auto speed auto ! ! router bgp 150 no synchronization bgp log-neighbor-changes network 150.1.1.0 mask 255.255.255.0 network 150.1.2.0 mask 255.255.255.0 network 150.1.3.0 mask 255.255.255.0 neighbor 1.1.5.31 remote-as 130 neighbor 1.1.5.31 password cisco neighbor 1.1.6.41 remote-as 140 neighbor 1.1.6.41 password cisco no auto-summary ! 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 Part2:ルート集約
Step1:AS110内のBGPルートの集約の設定
R11/R12/R15/R16でAS110内のBGPルートの集約ルート110.1.0.0/21を生成します。また、Suppress-mapによって、第3オクテットが奇数である集約前のBGPルートのアドバタイズを抑制します。これにより、第3オクテットが偶数である集約前のBGPルートを集約ルートともにアドバタイズできます。
R11/R15 AS110 ルート集約
router bgp 65100 aggregate-address 110.1.0.0 255.255.248.0 suppress-map ODD access-list 10 permit 110.1.1.0 0.0.254.0 route-map ODD permit 10 match ip address 10 route-map ODD deny 20
R12/R16 AS110 ルート集約
router bgp 65200 aggregate-address 110.1.0.0 255.255.248.0 suppress-map ODD access-list 10 permit 110.1.1.0 0.0.254.0 route-map ODD permit 10 match ip address 10 route-map ODD deny 20
Step2:AS110内のBGPルートの集約の確認
集約ルート生成の設定をしたルータで集約ルートの生成を確認します。そのために、次のshowコマンドを利用します。
- show ip bgp | include 110.1.
- show ip bgp neighbor <ip-address> advertised-routes | include 110.1.
R11では、次のような表示になります。
R11 集約ルートの確認
R11#show ip bgp | include 110.1. *> 110.1.0.0/21 0.0.0.0 32768 i s> 110.1.1.0/24 0.0.0.0 0 32768 i r>i110.1.2.0/24 192.168.0.12 0 100 0 (65200) i r>i110.1.3.0/24 192.168.0.13 0 100 0 i r>i110.1.4.0/24 192.168.0.14 0 100 0 (65200) i r>i110.1.6.0/24 192.168.0.16 0 100 0 (65200) i R11#show ip bgp neighbors 1.1.1.21 advertised-routes | include 110.1. *> 110.1.0.0/21 0.0.0.0 32768 i r>i110.1.2.0/24 192.168.0.12 0 100 0 (65200) i r>i110.1.4.0/24 192.168.0.14 0 100 0 (65200) i r>i110.1.6.0/24 192.168.0.16 0 100 0 (65200) i
R11はR21に対して110.1.0.0/21、110.1.2.0/24、110.1.4.0/24、110.1.6.0/24のBGPルートをアドバタイズしていることがわかります。
Step3:AS120内のBGPルートの集約の設定
R21/R22でAS120内のBGPルートを集約した120.1.0.0/22の集約ルートを生成します。集約ルートのみをアドバタイズするために、aggregate-addressコマンドにsummary-onlyオプションを付加します。
R21/R22 AS120 ルート集約
router bgp 120 aggregate-address 120.1.0.0 255.255.252.0 summary-only
Step4:AS120内のBGPルートの集約の確認
集約ルート生成の設定をしたルータで集約ルートの生成を確認します。そのために、次のshowコマンドを利用します。
- show ip bgp | include 120.1.
- show ip bgp neighbor <ip-address> advertised-routes | include 120.1.
R21では、次のような表示になります。
R21 集約ルートの確認
R21#show ip bgp | include 120.1. * i120.1.0.0/22 172.16.0.22 0 100 0 i s> 120.1.1.0/24 0.0.0.0 0 32768 i s> 120.1.2.0/24 172.16.1.23 3 32768 i s> 120.1.3.0/24 172.16.1.23 2 32768 i R21#show ip bgp neighbors 1.1.1.11 advertised-routes | include 120.1. *> 120.1.0.0/22 0.0.0.0 32768 i
R21はR11に対して集約ルート 120.1.0.0/22のみをアドバタイズしていることがわかります。
Step5:AS130内のBGPルートの集約の設定
R31でAS130内のBGPルートを集約した130.1.0.0/22の集約ルートを生成します。集約ルートのみをアドバタイズするためにsummary-onlyオプションを付加します。さらに、attribute-mapによって集約ルートにCOMMUNITYアトリビュートを付加します。
R31 AS130 ルート集約
router bgp 130 aggregate-address 130.1.0.0 255.255.252.0 summary-only attribute-map ATT route-map ATT permit 10 set community 130:1 ip bgp-community new-format
Step6:AS130内のBGPルートの集約の確認
集約ルート生成の設定をしたルータで集約ルートの生成を確認します。そのために、次のshowコマンドを利用します。
- show ip bgp 130.1.0.0
- show ip bgp neighbor <ip-address> advertised-routes | include 130.1.
R31では、次のような表示になります。
R31 集約ルートの確認
R31#show ip bgp 130.1.0.0
BGP routing table entry for 130.1.0.0/22, version 39
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Flag: 0x8A0
Advertised to update-groups:
1
Local, (aggregated by 130 130.1.1.1)
0.0.0.0 from 0.0.0.0 (130.1.1.1)
Origin IGP, localpref 100, weight 32768, valid, aggregated, local, atomic-aggregate, best
Community: 130:1
R31#show ip bgp neighbors 1.1.3.15 advertised-routes | include 130.1.
BGP table version is 42, local router ID is 130.1.1.1
*> 130.1.0.0/22 0.0.0.0 32768 i
R31で生成したBGP集約ルート 130.1.0.0/22に130:1のCOMMUNITYアトリビュートが付加されていることがわかります。また、集約ルートのみをネイバーにアドバタイズしています。
Step7:AS140内のBGPルートの集約の設定
R41でAS130内のBGPルートを集約した140.1.0.0/22の集約ルートを生成します。集約ルートのみをアドバタイズするためにsummary-onlyオプションを付加します。そして、Unsuppress-mapによって、R51にだけ集約前の140.1.2.0/24のBGPルートもアドバタイズします。
R41 AS140 ルート集約
router bgp 140 aggregate-address 140.1.0.0 255.255.252.0 summary-only neighbor 1.1.6.51 unsuppress-map UNSUPP access-list 1 permit 140.1.2.0 route-map UNSUPP permit 10 match ip address 1
Step8:AS140内のBGPルートの集約の確認
集約ルート生成の設定をしたルータで集約ルートの生成を確認します。そのために、次のshowコマンドを利用します。
- show ip bgp 140.1.0.0
- show ip bgp neighbor <ip-address> advertised-routes | include 140.1.
R41では、次のような表示になります。
R41 集約ルートの確認
R41#show ip bgp 140.1.0.0
BGP routing table entry for 140.1.0.0/22, version 11
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Flag: 0x820
Advertised to update-groups:
1 2
Local, (aggregated by 140 140.1.1.1)
0.0.0.0 from 0.0.0.0 (140.1.1.1)
Origin IGP, localpref 100, weight 32768, valid, aggregated, local, atomic-aggregate, best
R41#show ip bgp neighbors 1.1.4.16 advertised-routes | include 140.1.
BGP table version is 17, local router ID is 140.1.1.1
*> 140.1.0.0/22 0.0.0.0 32768 i
R41#show ip bgp neighbors 1.1.6.51 advertised-routes | include 140.1.
BGP table version is 17, local router ID is 140.1.1.1
*> 140.1.0.0/22 0.0.0.0 32768 i
s> 140.1.2.0/24 0.0.0.0 0 32768 i
R41はR16に対して集約ルート140.1.0.0/22のみをアドバタイズしています。一方、R51に対して集約ルート140.1.0.0/22と140.1.2.0/24をアドバタイズしていることがわかります。
Step9:AS150内のBGPルートの集約の設定
R31/R41でAS150内のBGPルートを集約した150.1.0.0/22の集約ルートを生成します。as-setオプションを付加することで、生成した集約ルートのAS_PATHアトリビュートに元のAS番号150の情報を継承させます。
R31 AS150 ルート集約
router bgp 130 aggregate-address 150.1.0.0 255.255.252.0 as-set
R41 AS150 ルート集約
router bgp 140 aggregate-address 150.1.0.0 255.255.252.0 as-set
Step10:AS150内のBGPルートの集約の確認
集約ルート生成の設定をしたルータで集約ルートの生成を確認します。そのために、次のshowコマンドを利用します。
- show ip bgp 150.1.0.0
R31では、次のような表示になります。
R41 集約ルートの確認
R31#show ip bgp 150.1.0.0
BGP routing table entry for 150.1.0.0/22, version 52
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to update-groups:
1
150, (aggregated by 130 130.1.1.1)
0.0.0.0 from 0.0.0.0 (130.1.1.1)
Origin IGP, localpref 100, weight 32768, valid, aggregated, local, best
R31で生成したAS150内のネットワークアドレスを集約した集約ルート150.1.0.0/22のAS_PATHアトリビュートが150であることがわかります。これは、集約前の150.1.1.0/24～150.1.3.0/24のAS_PATHアトリビュート内のAS番号を継承しています。
図は集約ルートのみに注目しています。summary-onlyオプションをつけていないので、R31/R41は集約前のAS150のルートもアドバタイズしていますが、図では省略しています。
Part2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 192.168.0.11 255.255.255.255 ! interface Loopback1 ip address 110.1.1.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.1.11 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.1.11 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 11.11.11.11 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65100 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 network 110.1.1.0 mask 255.255.255.0 aggregate-address 110.1.0.0 255.255.248.0 suppress-map ODD neighbor 1.1.1.21 remote-as 120 neighbor 1.1.1.21 password cisco neighbor 192.168.0.13 remote-as 65100 neighbor 192.168.0.13 update-source Loopback0 neighbor 192.168.0.13 next-hop-self no auto-summary ! ip http server ip forward-protocol nd ! ! ! access-list 10 permit 110.1.1.0 0.0.254.0 ! route-map ODD permit 10 match ip address 10 ! route-map ODD deny 20 ! ! ! 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 192.168.0.12 255.255.255.255 ! interface Loopback1 ip address 110.1.2.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.2.12 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.1.12 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 12.12.12.12 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65200 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 network 110.1.2.0 mask 255.255.255.0 aggregate-address 110.1.0.0 255.255.248.0 suppress-map ODD neighbor 1.1.2.22 remote-as 120 neighbor 1.1.2.22 password cisco neighbor 192.168.0.14 remote-as 65200 neighbor 192.168.0.14 update-source Loopback0 neighbor 192.168.0.14 next-hop-self no auto-summary ! ip http server ip forward-protocol nd ! ! ! access-list 10 permit 110.1.1.0 0.0.254.0 ! route-map ODD permit 10 match ip address 10 ! route-map ODD deny 20 ! ! ! 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 192.168.0.13 255.255.255.255 ! interface Loopback1 ip address 110.1.3.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 192.168.1.13 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.2.13 255.255.255.0 duplex auto speed auto ! interface FastEthernet2/0 ip address 192.168.3.13 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 13.13.13.13 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65100 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 bgp confederation peers 65200 network 110.1.3.0 mask 255.255.255.0 neighbor 192.168.0.11 remote-as 65100 neighbor 192.168.0.11 update-source Loopback0 neighbor 192.168.0.11 route-reflector-client neighbor 192.168.0.14 remote-as 65200 neighbor 192.168.0.14 ebgp-multihop 255 neighbor 192.168.0.14 update-source Loopback0 neighbor 192.168.0.15 remote-as 65100 neighbor 192.168.0.15 update-source Loopback0 neighbor 192.168.0.15 route-reflector-client no auto-summary ! 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
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 192.168.0.14 255.255.255.255 ! interface Loopback1 ip address 110.1.4.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 192.168.1.14 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.2.14 255.255.255.0 duplex auto speed auto ! interface FastEthernet2/0 ip address 192.168.3.14 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 14.14.14.14 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65200 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 bgp confederation peers 65100 network 110.1.4.0 mask 255.255.255.0 neighbor 192.168.0.12 remote-as 65200 neighbor 192.168.0.12 update-source Loopback0 neighbor 192.168.0.12 route-reflector-client neighbor 192.168.0.13 remote-as 65100 neighbor 192.168.0.13 ebgp-multihop 255 neighbor 192.168.0.13 update-source Loopback0 neighbor 192.168.0.16 remote-as 65200 neighbor 192.168.0.16 update-source Loopback0 neighbor 192.168.0.16 route-reflector-client no auto-summary ! 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
R15 Completed Configuration(Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R15 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 192.168.0.15 255.255.255.255 ! interface Loopback1 ip address 110.1.5.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.3.15 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.2.15 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 15.15.15.15 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65100 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 network 110.1.5.0 mask 255.255.255.0 aggregate-address 110.1.0.0 255.255.248.0 suppress-map ODD neighbor 1.1.3.31 remote-as 130 neighbor 1.1.3.31 password cisco neighbor 192.168.0.13 remote-as 65100 neighbor 192.168.0.13 update-source Loopback0 neighbor 192.168.0.13 next-hop-self no auto-summary ! ip http server ip forward-protocol nd ! ! ! access-list 10 permit 110.1.1.0 0.0.254.0 ! route-map ODD permit 10 match ip address 10 ! route-map ODD deny 20 ! ! ! 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
R16 Completed Configuration(Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R16 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 192.168.0.16 255.255.255.255 ! interface Loopback1 ip address 110.1.6.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.4.16 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 192.168.2.16 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 16.16.16.16 log-adjacency-changes network 110.1.0.0 0.0.255.255 area 0 network 192.168.0.0 0.0.255.255 area 0 ! router bgp 65200 no synchronization bgp log-neighbor-changes bgp confederation identifier 110 network 110.1.6.0 mask 255.255.255.0 aggregate-address 110.1.0.0 255.255.248.0 suppress-map ODD neighbor 1.1.4.41 remote-as 140 neighbor 1.1.4.41 password cisco neighbor 192.168.0.14 remote-as 65200 neighbor 192.168.0.14 update-source Loopback0 neighbor 192.168.0.14 next-hop-self no auto-summary ! ip http server ip forward-protocol nd ! ! ! access-list 10 permit 110.1.1.0 0.0.254.0 ! route-map ODD permit 10 match ip address 10 ! route-map ODD deny 20 ! ! ! 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 172.16.0.21 255.255.255.255 ! interface Loopback1 ip address 120.1.1.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.1.21 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 172.16.1.21 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 21.21.21.21 log-adjacency-changes network 120.1.0.0 0.0.255.255 area 0 network 172.16.0.0 0.0.255.255 area 0 ! router bgp 120 no synchronization bgp log-neighbor-changes aggregate-address 120.1.0.0 255.255.252.0 summary-only redistribute ospf 1 route-map AS120 neighbor 1.1.1.11 remote-as 110 neighbor 1.1.1.11 password cisco neighbor 172.16.0.22 remote-as 120 neighbor 172.16.0.22 update-source Loopback0 neighbor 172.16.0.22 next-hop-self neighbor 172.16.0.23 remote-as 120 neighbor 172.16.0.23 update-source Loopback0 neighbor 172.16.0.23 next-hop-self no auto-summary ! ip http server ip forward-protocol nd ! ! ! access-list 1 permit 120.1.0.0 0.0.255.255 ! route-map AS120 permit 10 match ip address 1 set origin igp ! ! ! 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 172.16.0.22 255.255.255.255 ! interface Loopback1 ip address 120.1.2.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 1.1.2.22 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 172.16.2.22 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 22.22.22.22 log-adjacency-changes network 120.1.0.0 0.0.255.255 area 0 network 172.16.0.0 0.0.255.255 area 0 ! router bgp 120 no synchronization bgp log-neighbor-changes aggregate-address 120.1.0.0 255.255.252.0 summary-only redistribute ospf 1 route-map AS120 neighbor 1.1.2.12 remote-as 110 neighbor 1.1.2.12 password cisco neighbor 172.16.0.21 remote-as 120 neighbor 172.16.0.21 update-source Loopback0 neighbor 172.16.0.21 next-hop-self neighbor 172.16.0.23 remote-as 120 neighbor 172.16.0.23 update-source Loopback0 neighbor 172.16.0.23 next-hop-self no auto-summary ! ip http server ip forward-protocol nd ! ! ! access-list 1 permit 120.1.0.0 0.0.255.255 ! route-map AS120 permit 10 match ip address 1 set origin igp ! ! ! 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 172.16.0.23 255.255.255.255 ! interface Loopback1 ip address 120.1.3.1 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip address 172.16.1.23 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 172.16.2.23 255.255.255.0 duplex auto speed auto ! ! router ospf 1 router-id 23.23.23.23 log-adjacency-changes network 120.1.0.0 0.0.255.255 area 0 network 172.16.0.0 0.0.255.255 area 0 ! router bgp 120 no synchronization bgp log-neighbor-changes neighbor 172.16.0.21 remote-as 120 neighbor 172.16.0.21 update-source Loopback0 neighbor 172.16.0.22 remote-as 120 neighbor 172.16.0.22 update-source Loopback0 no auto-summary ! 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 Loopback1 ip address 130.1.3.1 255.255.255.0 secondary ip address 130.1.2.1 255.255.255.0 secondary ip address 130.1.1.1 255.255.255.0 ! interface FastEthernet0/0 ip address 1.1.3.31 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 1.1.5.31 255.255.255.0 duplex auto speed auto ! ! router bgp 130 no synchronization bgp log-neighbor-changes network 130.1.1.0 mask 255.255.255.0 network 130.1.2.0 mask 255.255.255.0 network 130.1.3.0 mask 255.255.255.0 neighbor 1.1.3.15 remote-as 110 neighbor 1.1.3.15 password cisco neighbor 1.1.5.51 remote-as 150 neighbor 1.1.5.51 password cisco no auto-summary ! 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 Loopback1 ip address 140.1.3.1 255.255.255.0 secondary ip address 140.1.2.1 255.255.255.0 secondary ip address 140.1.1.1 255.255.255.0 ! interface FastEthernet0/0 ip address 1.1.4.41 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 1.1.6.41 255.255.255.0 duplex auto speed auto ! ! router bgp 140 no synchronization bgp log-neighbor-changes network 140.1.1.0 mask 255.255.255.0 network 140.1.2.0 mask 255.255.255.0 network 140.1.3.0 mask 255.255.255.0 neighbor 1.1.4.16 remote-as 110 neighbor 1.1.4.16 password cisco neighbor 1.1.6.51 remote-as 150 neighbor 1.1.6.51 password cisco no auto-summary ! 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
R51 Completed Configuration(Click)
! ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R51 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback1 ip address 150.1.2.1 255.255.255.0 secondary ip address 150.1.3.1 255.255.255.0 secondary ip address 150.1.1.1 255.255.255.0 ! interface FastEthernet0/0 ip address 1.1.5.51 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 ip address 1.1.6.51 255.255.255.0 duplex auto speed auto ! ! router bgp 150 no synchronization bgp log-neighbor-changes network 150.1.1.0 mask 255.255.255.0 network 150.1.2.0 mask 255.255.255.0 network 150.1.3.0 mask 255.255.255.0 neighbor 1.1.5.31 remote-as 130 neighbor 1.1.5.31 password cisco neighbor 1.1.6.41 remote-as 140 neighbor 1.1.6.41 password cisco no auto-summary ! 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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- BGPネイバー認証
- BGP Well Known Mandatory アトリビュート -ORIGIN/AS_PATH/NEXT_HOP-
- 図解！BGPベストパス選択アルゴリズム
- BGP 基本的な設定についての演習[Cisco]
- BGPの基本的な設定についての演習 ～トラブルシュート～
- BGP KEEPALIVEタイマ/ホールドタイムの設定
- BGPルート 最小送信間隔の設定
- BGPルートダンプニング
- マルチホーム – インターネット接続の冗長化 –
- マルチホームAS BGPルートフィルタのポイント
- マルチホームAS ベストパス選択のポイント
- マルチホームAS IGPとBGPの連携のポイント
- マルチホームAS BGPの設定例
- IP-VPNでのBGPの利用 設定例
- BGPルートフィルタの種類
- BGPルートフィルタ -ディストリビュートリスト-
- BGPルートフィルタ -ディストリビュートリスト設定例-
- BGPルートフィルタ -プレフィクスリスト-
- BGPルートフィルタ -プレフィクスリスト設定例-
- BGPルートフィルタ -フィルタリスト(AS_PATH ACL)-
- BGPルートフィルタ -フィルタリスト(AS_PATH ACL)設定例-
- BGPルートフィルタ -ルートマップ(route-map)-
- BGPルートフィルタ -ルートマップ(route-map)設定例-
- BGP neighbor allowas-inコマンド
- BGP neighbor as-overrideコマンド
- BGPルート RIB Failure
- BGPルート アドミニストレイティブディスタンスの制御
- BGPルートの負荷分散
- BGPルート 条件付き生成
- BGPルート 条件付きアドバタイズ
- BGP ルート集約 自動集約
- BGPルート集約 networkコマンドによる集約
- BGPルート集約 networkコマンドによる集約 設定例
- BGP ルート集約 aggregate-addressコマンドによる集約
- aggregate-addressコマンドのオプション summary-only
- aggregate-addressコマンドのオプション attribute-map
- aggregate-addressコマンドのオプション as-set
- aggregate-addressコマンドのオプション advertise-map
- aggregate-addressコマンド as-set/attribute-map/advertise-map 設定例
- BGP選択型集約の概要
- BGP選択型集約 suppress-map
- BGP選択型集約 unsuppress-map
- BGP 選択型集約 suppress-map/unsuppress-map 設定例
- BGP local-as ～ネイバーに他のASのように見せる～
- BGP neighbor remove-private-ASコマンド
- bgp fast external-fallover
- BGP プレフィクス数の制限
- BGP COMMUNITYアトリビュートの使い方
- BGP Well-known COMMUNITYのルートフィルタ設定例
- BGP プライベートCOMMUNITYによるルート制御の設定例
- [演習]BGP応用 Part1:BGP基本設定
- [演習]BGP応用 Part2:ルート集約
- [演習]BGP応用 Part3:ポリシーベースルーティング
- [演習]BGP応用 Part4:トラブルシューティング
- BGP 設定ミスの切り分けと修正 Part1
- BGP 設定ミスの切り分けと修正 Part2
- BGP 設定ミスの切り分けと修正 Part3
- BGP 設定ミスの切り分けと修正 Part4
- BGP 設定ミスの切り分けと修正 Part5
- BGP 設定ミスの切り分けと修正 Part6
- BGP 設定ミスの切り分けと修正 Part7
- IPv6 BGPの設定例 Part1
- IPv6 BGPの設定例 Part2
- 2021年10月4日 Facebookに何が起こったか？
- IPv4 BGPネイバーでのIPv6プレフィックスの交換