华为交换机 HCDP实验 BFD基础配置（静态路由备份）
| 发布时间: 2019-06-10 21:16:19 | 1542 次浏览
一、实验拓扑实验拓扑比较容易理解，一主一备两条广域网链路，连接两台PC
二、基础实验配置R1的基础配置
#
interface Vlanif1
ip address 192.168.10.1 255.255.255.0
#
interface GigabitEthernet0/0/0
ip address 12.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 102.1.1.1 255.255.255.0
#
ip route-static 192.168.20.0 255.255.255.0 102.1.1.2
ip route-static 192.168.20.0 255.255.255.0 12.1.1.2 preference 100
#
|
R2的基础配置
#
interface Vlanif1
ip address 192.168.20.1 255.255.255.0
#
interface GigabitEthernet0/0/0
ip address 12.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 102.1.1.2 255.255.255.0
#
ip route-static 192.168.10.0 255.255.255.0 102.1.1.1
ip route-static 192.168.10.0 255.255.255.0 12.1.1.1 preference 100
#
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三、测试现况（未使能BFD）移除HUB2和HUB3之间的链路，发现在PC间的通信中断，因为静态路由不能进行收敛
PC>ping 192.168.20.20
Ping 192.168.20.20: 32 data bytes, Press Ctrl_C to break
Request timeout!
Request timeout!
Request timeout!
Request timeout!
Request timeout!
--- 192.168.20.20 ping statistics ---
5 packet(s) transmitted
0 packet(s) received
100.00% packet loss
|
四、 配置BFD功能实现静态路由的备份功能
这里BFD有两种方式：手工方式 或 自动方式，配置时二选一即可
如果是手工方式，R1配置如下
bfd
bfd manual001 bind peer-ip 102.1.1.2 source-ip 102.1.1.1
discriminator local 100
discriminator remote 200
min-tx-interval 500
min-rx-interval 500
commit
|
如果是手工方式，R2配置如下
bfd
bfd manual001 bind peer-ip 102.1.1.1 source-ip 102.1.1.2
discriminator local 200
discriminator remote 100
min-tx-interval 500
min-rx-interval 500
commit
|
查看BFD会话的命令
[AR2]dis bfd session all
--------------------------------------------------------------------------------
Local Remote PeerIpAddr State Type InterfaceName
--------------------------------------------------------------------------------
200 100 102.1.1.1 Up S_IP_PEER -
--------------------------------------------------------------------------------
Total UP/DOWN Session Number : 1/0
|
（和手工二选一）如果是自动方式配置BFD，R1配置如下
bfd
bfd testauto bind peer-ip 102.1.1.2 source-ip 102.1.1.1 auto
min-tx-interval 500
min-rx-interval 500
commit
|
（和手工二选一）如果是自动方式配置BFD，R2配置如下
bfd
bfd testauto bind peer-ip 102.1.1.1 source-ip 102.1.1.2 auto
min-tx-interval 500
min-rx-interval 500
commit
|
检查的命令如下
[AR2]dis bfd session dynamic
--------------------------------------------------------------------------------
Local Remote PeerIpAddr State Type InterfaceName
--------------------------------------------------------------------------------
8193 8192 102.1.1.1 Up S_AUTO_PEER -
--------------------------------------------------------------------------------
Total UP/DOWN Session Number : 1/0
|
五、配置路由调用BFDR1的配置
[AR1]ip route-static 192.168.20.0 24 102.1.1.2 track bfd-session manual001
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R2的配置
[AR2]ip route-static 192.168.10.0 24 102.1.1.1 track bfd-session manual001
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六、测试网络备份能力在PC上发起PING包并且同时中断HUB2和HUB3之间的连线，观察PING的情况如下（只有一个丢包）
PC>ping 192.168.20.20 -c 20Ping 192.168.20.20: 32 data bytes, Press Ctrl_C to break
From 192.168.20.20: bytes=32 seq=1 ttl=126 time=31 ms
From 192.168.20.20: bytes=32 seq=2 ttl=126 time=16 ms
From 192.168.20.20: bytes=32 seq=3 ttl=126 time=15 ms
From 192.168.20.20: bytes=32 seq=4 ttl=126 time=15 ms
From 192.168.20.20: bytes=32 seq=5 ttl=126 time=15 ms
From 192.168.20.20: bytes=32 seq=6 ttl=126 time=15 ms
Request timeout!
From 192.168.20.20: bytes=32 seq=8 ttl=126 time=31 ms
From 192.168.20.20: bytes=32 seq=9 ttl=126 time=16 ms
From 192.168.20.20: bytes=32 seq=10 ttl=126 time=16 ms
|
观察静态路由表发现主链路因BFD失效变成了inactive
[AR1]dis ip routing-table protocol static
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Public routing table : Static
Destinations : 1 Routes : 2 Configured Routes : 2
Static routing table status : <Active>
Destinations : 1 Routes : 1
Destination/Mask Proto Pre Cost Flags NextHop Interface
192.168.20.0/24 Static 100 0 RD 12.1.1.2 GigabitEthernet0
/0/0
Static routing table status : <Inactive>
Destinations : 1 Routes : 1
Destination/Mask Proto Pre Cost Flags NextHop Interface
192.168.20.0/24 Static 60 0 R 102.1.1.2 GigabitEthernet0
/0/1
[AR1]
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