HCDP实验：BFD检测动态路由协议

1、一、实验拓扑和上个实验?使用BFD备份静态路由?的拓扑一样，编址一样。二、根底配置R1的根底配置#sysname AR1#interface Vlanif1ip address 192.168.10.1 255.255.255.0#interface GigabitEthernet0/0/0ip address 12.1.1.1 255.255.255.0ospf cost 5#interface GigabitEthernet0/0/1ip address 102.1.1.1 255.255.255.0#interface LoopBack0ip address 1.1.1.1 255.25

2、5.255.255#bgp 100peer 2.2.2.2 as-number 100peer 2.2.2.2 connect-interface LoopBack0#ipv4-family unicast undo synchronization network 192.168.10.0 peer 2.2.2.2 enable#ospf 1 router-id 1.1.1.1area 0.0.0.0 network 1.1.1.1 0.0.0.0 network 12.1.1.1 0.0.0.0 network 102.1.1.1 0.0.0.0#R2的根底配置#sysname AR2#in

3、terface Vlanif1ip address 192.168.20.1 255.255.255.0#interface GigabitEthernet0/0/0ip address 12.1.1.2 255.255.255.0ospf cost 5#interface GigabitEthernet0/0/1ip address 102.1.1.2 255.255.255.0#interface LoopBack0ip address 2.2.2.2 255.255.255.255#bgp 100peer 1.1.1.1 as-number 100peer 1.1.1.1 connect

4、-interface LoopBack0#ipv4-family unicast undo synchronization network 192.168.20.0 peer 1.1.1.1 enable#ospf 1 router-id 2.2.2.2area 0.0.0.0 network 2.2.2.2 0.0.0.0 network 12.1.1.2 0.0.0.0 network 102.1.1.2 0.0.0.0#三、观查现况未使能BFD在PC上发50个ping包，并同时中断HUB2 和HUB3之间的链路，观察OSPF和BGP的收敛，及PC的丢包PCping 192.168.20.

5、20 -c 50Ping 192.168.20.20: 32 data bytes, Press Ctrl_C to breakFrom 192.168.20.20: bytes=32 seq=1 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 seq=2 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 seq=3 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 seq=4 ttl=126 time=31 msFrom 192.168.20.20: byte

6、s=32 seq=5 ttl=126 time=16 msRequest timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout!Request timeout

7、!Request timeout!Request timeout!From 192.168.20.20: bytes=32 seq=25 ttl=126 time=15 msFrom 192.168.20.20: bytes=32 seq=26 ttl=126 time=15 msFrom 192.168.20.20: bytes=32 seq=27 ttl=126 time=31 msFrom 192.168.20.20: bytes=32 seq=28 ttl=126 time=16 ms- 192.168.20.20 ping statistics - 28 packet(s) tran

8、smitted 9 packet(s) received 67.86% packet loss round-trip min/avg/max = 15/19/31 ms发现PC上发生40秒的丢包，大约20个包，很严重的问题，想想为什么？四、配置BFD进行故障收敛的加速R1的路由器配置BGP的BFD可选，这里是展示命令bfdquitospf 1bfd all-interfaces enablebfd all-interfaces min-tx-interval 500 min-rx-interval 500bgp 100peer 2.2.2.2 bfd enableR2的路由器配置BGP的BFD

9、可选，这里是展示命令bfdquitospf 1bfd all-interfaces enablebfd all-interfaces min-tx-interval 500 min-rx-interval 500bgp 100peer 1.1.1.1 bfd enable配置完成后检查BFD会话AR1dis bfd session all-Local Remote PeerIpAddr State Type InterfaceName-8192 8192 2.2.2.2 Up D_IP_PEER -8193 8193 12.1.1.2 Up D_IP_IF GigabitEthernet0/0

10、/08194 8194 102.1.1.2 Up D_IP_IF GigabitEthernet0/0/1- Total UP/DOWN Session Number : 3/0五、重新测试路由收敛速度重新在PC上发起ping包，再次中断Hub2 和Hub3的连线先要连好等路由计算正确，测试丢包及收敛速度PCping 192.168.20.20 -c 50Ping 192.168.20.20: 32 data bytes, Press Ctrl_C to breakFrom 192.168.20.20: bytes=32 seq=1 ttl=126 time=16 msFrom 192.168

11、.20.20: bytes=32 seq=2 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 seq=3 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 seq=4 ttl=126 time=16 msRequest timeout!From 192.168.20.20: bytes=32 seq=6 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 seq=7 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 se

12、q=8 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 seq=9 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 seq=10 ttl=126 time=15 msFrom 192.168.20.20: bytes=32 seq=11 ttl=126 time=31 msFrom 192.168.20.20: bytes=32 seq=12 ttl=126 time=16 msFrom 192.168.20.20: bytes=32 seq=13 ttl=126 time=15 msFrom 192.168.20.20: bytes=32 seq=14 ttl=126 time=31 msFrom 192.168.20.20: bytes=32 seq=15 ttl=126 time=16 ms- 192.168.20.20 ping statistics - 15 packet(s) transmitted 14 packet(s) received 6.67% packet loss round-