雙向轉發檢測BFD(Bidirectional Forwarding Detection)是一種全網統一的檢測機制,用於快速檢測、
監控網絡中鏈路或者IP路由的轉發連通狀況。此處列舉了BFD與靜態路由聯動配置,以及BFD與ospf聯動配置。
實驗拓撲圖
一、BFD與靜態路由聯動配置
(1)ip地址的配置
R1:
sys
sysn R1
inter g0/0/1
ip address 10.0.13.1 24
inter g0/0/0
ip address 10.0.12.1 24
quit
R2:
sys
sysn R2
inter g0/0/0
ip address 10.0.13.13 24
quit
R3:
sys
sysn R3
inter g0/0/0
ip address 10.0.12.12 24
quit
(2)在R2和R3上配置靜態路由實現通信
R2:
ip route-static 10.0.12.0 24 10.0.13.1
R3:
ip route-static 10.0.13.0 24 10.0.12.1
(3)在R1和R2路徑上啓用BFD配置,檢測R1到R2接口
R1:
[R1]bfd //啓用BFD配置
[R1-bfd]quit
[R1]bfd 1 bind peer-ip 10.0.13.13 source-ip 10.0.13.1 auto //創建BFD會話綁定信息,
並進入BFD會話視圖。
[R1-bfd-session-1]commit //提交BFD會話配置
[R1-bfd-session-1]quit
R2:
[R2]bfd
[R2-bfd]quit
[R2]bfd 1 bind peer-ip 10.0.13.1 source-ip 10.0.13.13 auto
[R2-bfd-session-1]commit
[R2-bfd-session-1]quit
(4)檢查BFD會話信息
[R1]display bfd session all
(5)在R1上配置靜態路由並聯動BFD:
[R1] ip route-static 0.0.0.0 0.0.0.0 10.0.13.13 track bfd-session 1'
此時,靜態路由與BFD的聯動已配置完成,bfd可以快速檢測、監控網絡中鏈路或者IP路由的轉發連通狀況。
二、BFD與OSPF聯動配置
(1)刪除靜態路由、bfd
R1:
undo ip route-static 0.0.0.0 0.0.0.0 10.0.13.13
undo ip route-static 0.0.0.0 0.0.0.0 10.0.12.12
undo bfd 1
R2:
undo ip route-static 10.0.12.0 255.255.255.0 10.0.13.1
undo bfd 1
R3:
undo ip route-static 10.0.13.0 255.255.255.0 10.0.12.1
undo bfd 1
(2)配置ospf協議實現路由通信
R1:
ospf 1
area 0.0.0.0
network 10.0.12.0 0.0.0.255
network 10.0.13.0 0.0.0.255
return
R2:
sys
ospf 1
area 0.0.0.0
network 10.0.13.0 0.0.0.255
return
R3:
sys
ospf 1
area 0.0.0.0
network 10.0.12.0 0.0.0.255
area 0.0.0.1
return
(3)配置bfd與ospf聯動
配置 BFD session需要在系統全局下開啓BFD,並且在OSPF視圖下啓用聯動BFD。
R1:
sys
bfd // 啓用bfd
quit
ospf 1
bfd all-interfaces enable //在osp視圖下啓用聯動bfd
return
R2:
sys
bfd
quit
ospf 1
bfd all-interfaces enable
return
(4)
dis bfd session all 查看bfd會話