BGP Graceful Restart – アウトプット広場

RT1——RT2——RT3——RT4

Q: Graceful-Restartって何？

A: BGPがリセットされてもしばらくの間経路を保持しておいて、復旧時に経路情報を継続利用できるようにする機能のこと

コンフィグ(RT1~4)

[iosv-1]
int lo0
ip add 100.1.1.1 255.255.255.0
!
int gi0/0
ip add 192.168.12.1 255.255.255.0
no shut
!
router bgp 64700
nei 192.168.12.2 remote 64700
nei 192.168.12.2 next-hop-self
nei 192.168.12.2 ha-mode graceful-restart
net 100.1.1.0 mask 255.255.255.0

[iosv-2]
int lo0
ip add 100.2.2.2 255.255.255.0
!
int gi0/0
ip add 192.168.12.2 255.255.255.0
no shut
!
int gi0/1
ip add 192.168.23.2 255.255.255.0
no shut
!
router bgp 64700
nei 192.168.12.1 remote 64700
nei 192.168.12.1 next-hop-self
nei 192.168.12.1 ha-mode graceful-restart
nei 192.168.23.3 remote 64700
nei 192.168.23.3 next-hop-self
nei 192.168.23.3 ha-mode graceful-restart
net 100.2.2.0 mask 255.255.255.0

[iosv-3]
int lo0
ip address 100.3.3.0 255.255.255.0
!
int gi0/0
ip add 192.168.23.3 255.255.255.0
no shut
!
int gi0/1
ip add 192.168.34.3 255.255.255.0
no shut
!
router bgp 64700
nei 192.168.34.4 remote 64700
nei 192.168.34.4 next-hop-self
nei 192.168.34.4 ha-mode graceful-restart
nei 192.168.23.2 remote 64700
nei 192.168.23.2 next-hop-self
nei 192.168.23.2 ha-mode graceful-restart
net 100.3.3.0 mask 255.255.255.0

[iosv-4]
int lo0
ip add 100.4.4.4 255.255.255.0
!
int gi0/0
ip add 192.168.34.4 255.255.255.0
no shut
!
router bgp 64700
nei 192.168.34.3 remote 64700
nei 192.168.34.3 next-hop-self
nei 192.168.34.3 ha-mode graceful-restart
net 100.4.4.0 mask 255.255.255.0

[コンフィグ要約]