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2011年5月アーカイブの最新記事

BGPのトラブル その6 【CCIEレベル】

（所属カテゴリー：IPルーティング | シスコ---投稿日時：2011年5月27日）

ネットワーク構成

R1～R6で次の図のようにAS1を構成しています。

図 BGPのトラブル その6 ネットワーク構成

AS1内では、R1とR2をルートリフレクタとしています。R3～R6はR1、R2との間でIBGPネイバーを確立します。AS1内のIGPとしてOSPFを利用しています。また、R3～R6はLoopback1のルート(172.16.Y.0/24)をBGPルートとして生成しています。

BGPのトラブル その6 Dynamipsネットワーク構成ファイル

設定概要

R1

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
interface Loopback0
 ip address 10.1.1.1 255.255.255.255
!
interface Serial0/0
 ip address 192.168.13.1 255.255.255.0
!
interface Serial0/1
 ip address 192.168.14.1 255.255.255.0
!
interface Serial0/2
 ip address 192.168.15.1 255.255.255.0
!
interface Serial0/3
 ip address 192.168.16.1 255.255.255.0
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.255.255.255 area 0
 network 192.168.0.0 0.0.255.255 area 0
!
router bgp 1
 synchronization
 bgp log-neighbor-changes
 neighbor 10.3.3.3 remote-as 1
 neighbor 10.3.3.3 update-source Loopback0
 neighbor 10.4.4.4 remote-as 1
 neighbor 10.4.4.4 update-source Loopback0
 neighbor 10.5.5.5 remote-as 1
 neighbor 10.5.5.5 update-source Loopback0
 neighbor 10.6.6.6 remote-as 1
 neighbor 10.6.6.6 update-source Loopback0
 no auto-summary
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

R2

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
interface Loopback0
 ip address 10.2.2.2 255.255.255.255
!
interface Serial0/0
 ip address 192.168.23.2 255.255.255.0
!
interface Serial0/1
 ip address 192.168.24.2 255.255.255.0
!
interface Serial0/2
 ip address 192.168.25.2 255.255.255.0
!
interface Serial0/3
 ip address 192.168.26.2 255.255.255.0
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.255.255.255 area 0
 network 192.168.0.0 0.0.255.255 area 0
!
router bgp 1
 no synchronization
 bgp log-neighbor-changes
 neighbor 10.3.3.3 remote-as 1
 neighbor 10.3.3.3 update-source Loopback0
 neighbor 10.3.3.3 route-reflector-client
 neighbor 10.4.4.4 remote-as 1
 neighbor 10.4.4.4 update-source Loopback0
 neighbor 10.4.4.4 route-reflector-client
 neighbor 10.5.5.5 remote-as 1
 neighbor 10.5.5.5 update-source Loopback0
 neighbor 10.5.5.5 route-reflector-client
 neighbor 10.6.6.6 remote-as 1
 neighbor 10.6.6.6 update-source Loopback0
 neighbor 10.6.6.6 route-reflector-client
 no auto-summary
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

R3

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
interface Loopback0
 ip address 10.3.3.3 255.255.255.255
!
interface Loopback1
 ip address 172.16.3.3 255.255.255.0
!
interface Serial0/0
 ip address 192.168.13.3 255.255.255.0
!

interface Serial0/1
 ip address 192.168.23.3 255.255.255.0
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.255.255.255 area 0
 network 192.168.0.0 0.0.255.255 area 0
!
router bgp 1
 no synchronization
 bgp log-neighbor-changes
 network 172.16.3.0 mask 255.255.255.0
 neighbor 10.1.1.1 remote-as 1
 neighbor 10.1.1.1 update-source Loopback0
 neighbor 10.2.2.2 remote-as 1
 neighbor 10.2.2.2 update-source Loopback0
 no auto-summary
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

R4

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
interface Loopback0
 ip address 10.4.4.4 255.255.255.255
!
interface Loopback1
 ip address 172.16.4.4 255.255.255.0
!
interface Serial0/0
 ip address 192.168.14.4 255.255.255.0
!
interface Serial0/1
 ip address 192.168.24.4 255.255.255.0
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.255.255.255 area 0
 network 192.168.0.0 0.0.255.255 area 0
!
router bgp 1
 no synchronization
 bgp log-neighbor-changes
 network 172.16.4.0 mask 255.255.255.0
 neighbor 10.1.1.1 remote-as 1
 neighbor 10.1.1.1 update-source Loopback0
 neighbor 10.2.2.2 remote-as 1
 neighbor 10.2.2.2 update-source Loopback0
 no auto-summary
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

R5

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
interface Loopback0
 ip address 10.5.5.5 255.255.255.255
!
interface Loopback1
 ip address 172.16.5.5 255.255.255.0
!
interface Serial0/0
 ip address 192.168.15.5 255.255.255.0
!
interface Serial0/1
 ip address 192.168.25.5 255.255.255.0
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.255.255.255 area 0
 network 192.168.0.0 0.0.255.255 area 0
!
router bgp 1
 no synchronization
 bgp log-neighbor-changes
 network 172.16.5.0 mask 255.255.255.0
 neighbor 10.1.1.1 remote-as 1
 neighbor 10.1.1.1 update-source Loopback0
 neighbor 10.2.2.2 remote-as 1
 neighbor 10.2.2.2 update-source Loopback0
 no auto-summary
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

R6

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
interface Loopback0
 ip address 10.6.6.6 255.255.255.255
!
interface Loopback1
 ip address 172.16.6.6 255.255.255.0
!
interface Serial0/0
 ip address 192.168.16.6 255.255.255.0
!
interface Serial0/1
 ip address 192.168.26.6 255.255.255.0
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.255.255.255 area 0
 network 192.168.0.0 0.0.255.255 area 0
!
router bgp 1
 no synchronization
 bgp log-neighbor-changes
 network 172.16.6.0 mask 255.255.255.0
 neighbor 10.1.1.1 remote-as 1
 neighbor 10.1.1.1 update-source Loopback0
 neighbor 10.2.2.2 remote-as 1
 neighbor 10.2.2.2 update-source Loopback0
 no auto-summary
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━