H3C万兆核心路由器SR8800 BFD for 静态路由（control方式 ）典型配置

 

1       组网需求

Router A与Router B之间通过二层交换机连接，并存在2条物理路径。配置2条静态路由，要求：

l              稳定情况下，Router A到Router B的路径选择其中1条静态路由转发；

l              当生效的路径故障时，能快速切换到另一静态路由所在路径。

   

图1  BFD for静态路由组网图（双向检测）

2  配置思路

l              配置各接口IP地址

l              Router A配置静态路由，并把优选的静态路由绑定BFD control报文方式。

l              Router B配置静态路由，与Router A优选的静态路由反向，并绑定BFD control报文方式。

3  配置步骤

3.1  路由器A的配置

1. 配置步骤

# 配置各接口IP

<RouterA> system-view

[RouterA] interface gigabitEthernet 3/1/1

[RouterA-GigabitEthernet3/1/1] ip address 192.168.0.1 24

[RouterA-GigabitEthernet3/1/1] interface GigabitEthernet 3/1/2

[RouterA-GigabitEthernet3/1/1] ip address 192.168.1.1 24

# 配置2条静态路由,目的IP相同，preference不同，优选的静态路由绑定BFD Control报文方式。

<RouterA> system-view

[RouterA] ip route-static 2.2.2.2 32 192.168.0.2 bfd control-packet preference 40

[RouterA] ip route-static 2.2.2.2 32 192.168.1.2 preference 50

[RouterA] interface GigabitEthernet 3/1/1

[RouterA-GigabitEthernet3/1/1] bfd min-transmit-interval 10

[RouterA-GigabitEthernet3/1/1] bfd min-receive-interval 10

[RouterA-GigabitEthernet3/1/1] bfd detect-multiplier 3

2. 配置文件

#

interface GigabitEthernet3/1/1

 port link-mode route

 ip address 192.168.0.1 255.255.255.0

 bfd min-transmit-interval 10

 bfd min-receive-interval 10

bfd detect-multiplier 3

#

interface GigabitEthernet3/1/2

 port link-mode route

 ip address 192.168.1.1 255.255.255.0

#

ip route-static 2.2.2.2 255.255.255.255 192.168.0.2 bfd control-packet preference 40

ip route-static 2.2.2.2 255.255.255.255 192.168.1.2 preference 50

#

3.2  路由器B的配置

1. 配置步骤

# 配置各接口IP

<RouterB> system-view

[RouterB] interface LoopBack 0

[RouterB--LoopBack0] ip address 2.2.2.2 32

[RouterB--LoopBack0] interface gigabitEthernet 3/1/1

[RouterB-GigabitEthernet3/1/1] ip address 192.168.0.2 24

[RouterB-GigabitEthernet3/1/1] interface gigabitEthernet 3/1/2

[RouterB-GigabitEthernet3/1/1] ip address 192.168.1.2 24

 

# 对应Router A优选静态路由，配置反向的静态路由，并绑定BFD control报文方式。

[RouterB] ip route-static 192.168.0.1 24 192.168.0.1 bfd control-packet

[RouterB] interface gigabitEthernet 3/1/1

[RouterB-GigabitEthernet3/1/1] bfd min-transmit-interval 10

[RouterB-GigabitEthernet3/1/1] bfd min-receive-interval 10

[RouterB-GigabitEthernet3/1/1] bfd detect-multiplier 3

 

2. 配置文件

#

interface LoopBack0

ip address 2.2.2.2 255.255.255.255

#

interface GigabitEthernet3/1/1

 port link-mode route

 ip address 192.168.0.2 255.255.255.0

 bfd min-transmit-interval 10

 bfd min-receive-interval 10

bfd detect-multiplier 3

#

interface GigabitEthernet3/1/2

 port link-mode route

 ip address 192.168.1.2 255.255.255.0

#

ip route-static 192.168.0.1 255.255.255.0 192.168.0.1 bfd control-packet

#

3.3  验证结果

可通过以下方式验证上述配置：

#查看静态路由，可看到preference值低的被优选。

[RouterA] display ip routing-table protocol static

Public Routing Table : Static

Summary Count : 2

 

Static Routing table Status : < Active>

Summary Count : 1

 

Destination/Mask    Proto  Pre  Cost         NextHop         Interface

 

2.2.2.2/32          Static 40   0            192.168.0.2      GE3/1/1

 

Static Routing table Status : < Inactive>

Summary Count : 1                                  

 

Destination/Mask    Proto  Pre  Cost         NextHop         Interface

 

2.2.2.2/32          Static 50   0            192.168.1.2      GE3/1/2

 

#查看Router A上的BFD会话信息，可以看到设备之间已经建立起了相应的session：

 

[RouterA] display bfd session verbose

 

Total Session Num: 1            Init Mode: Active

 

Session Working Under Ctrl Mode:

 

Local Discr: 21                  Remote Discr: 37

Source IP: 192.168.0.1         Destination IP: 192.168.0.2

Session State: Up                     Interface: GigabitEthernet3/1/1

Min Trans Inter: 10ms            Act Trans Inter: 10ms

Min Recv Inter: 10ms           Act Detect Inter: 30ms

Establish Time: 03:41:33          Last Down Time: 03:41:33

Last Up Time: 03:41:33               Auth mode: None

Connect Type: Direct                 Board Num: 3

Protocol: STATIC

Diag Info: No Diagnostic                     

 

# 查看Router B上的BFD会话信息，可以看到已经建立了相应的session：

 

[RouterB] display bfd session verbose

 

Total Session Num: 1            Init Mode: Active

 

Session Working Under Ctrl Mode:

 

Local Discr: 37                  Remote Discr: 21

Source IP: 192.168.0.2         Destination IP: 192.168.0.1

Session State: Up                     Interface: GigabitEthernet3/1/1

Min Trans Inter: 10ms            Act Trans Inter: 10ms

Min Recv Inter: 10ms           Act Detect Inter: 30ms

Establish Time: 03:41:33          Last Down Time: 03:41:33

Last Up Time: 03:41:33               Auth mode: None

Connect Type: Direct                 Board Num: 3

Protocol: STATIC

Diag Info: No Diagnostic