BFD for OSPF典型配置

1.组网需求

l              两台路由器Router A、Router B通过二层交换机互连，并且在双方接口上使能BFD应用，在路由器上运行OSPF，网络层相互可达。

l              在Router A和交换机之间的链路发生故障后，BFD能够快速检测并通告OSPF协议。

    

图1  BFD for OSPF配置举例组网图

2.配置思路

l              配置OSPF基本功能

l              配置BFD for OSPF

3  配置步骤

3.1  路由器A的配置

1. 配置步骤

# 配置OSPF基本功能

<RouterA> system-view

[RouterA] ospf

[RouterA-ospf-1] area 0

[RouterA-ospf-1-area-0.0.0.0] network 192.168.0.0 0.0.0.255

[RouterA-ospf-1-area-0.0.0.0] quit

[RouterA-ospf-1] quit

[RouterA] interface gigabitEthernet 3/1/1

[RouterA-GigabitEthernet3/1/1] ospf bfd enable

# 配置各路由器接口及BFD参数

<RouterA> system-view

[RouterA] bfd session init-mode active

[RouterA] interface gigabitEthernet 3/1/1

[RouterA-GigabitEthernet3/1/1] ip address 192.168.0.102 24

[RouterA-GigabitEthernet3/1/1] bfd min-transmit-interval 100

[RouterA-GigabitEthernet3/1/1] bfd min-receive-interval 100

[RouterA-GigabitEthernet3/1/1] bfd detect-multiplier 5

2. 配置文件

interface GigabitEthernet3/1/1

 port link-mode route

 ip address 192.168.0.102 255.255.255.0

 ospf bfd enable

bfd min-transmit-interval 100

bfd min-receive-interval 100

 bfd detect-multiplier 5

#

interface GigabitEthernet3/1/5

 port link-mode route

 shutdown

#

interface M-Ethernet4/0/0

 ip address 191.1.1.231 255.255.255.0

#

ospf 1

 area 0.0.0.0

  network 192.168.0.0 0.0.0.255

#

return      

3.2  路由器B的配置

1. 配置步骤

# 配置OSPF基本功能

<RouterB> system-view

[RouterB] ospf

[RouterB-ospf-1] area 0

[RouterB-ospf-1-area-0.0.0.0] network 192.168.0.0 0.0.0.255

[RouterB-ospf-1-area-0.0.0.0] quit

[RouterB-ospf-1] quit

[RouterB] interface GigabitEthernet 3/1/2

[RouterB-GigabitEthernet3/1/2] ospf bfd enable

# 配置各路由器接口及BFD参数

<RouterB> system-view

[RouterB] bfd session init-mode active

[RouterB] interface gigabitEthernet 3/1/2

[RouterB-GigabitEthernet3/1/2] ip address 192.168.0.100 24

[RouterB-GigabitEthernet3/1/2] bfd min-transmit-interval 100

[RouterB-GigabitEthernet3/1/2] bfd min-receive-interval 100

[RouterB-GigabitEthernet3/1/2] bfd detect-multiplier 5

2. 配置文件

[RouterB]dis cur

#

 bfd echo-source-ip 10.10.10.10

#

vlan 1

#

vlan 100

#

interface GigabitEthernet3/1/4

 port link-mode route

#

interface GigabitEthernet3/1/6

 port link-mode route

#

interface GigabitEthernet3/1/2

 port link-mode route

 ip address 192.168.0.100 255.255.255.0

 ospf bfd enable

bfd min-transmit-interval 100

bfd min-receive-interval 100

 bfd detect-multiplier 5

#

interface M-Ethernet4/0/0

 ip address 191.1.1.232 255.255.255.0

 ospf trans-delay 23

#

ospf 1

 area 0.0.0.0

  network 192.168.0.0 0.0.0.255

#

return           

3.3  验证结果

可通过以下方式验证上述配置，注意到设备之间已经建立了相应的session：

[RouterA]dis bfd session v

 

 Total Session Num: 1            Init Mode: Active

 

 Session Working Under Ctrl Mode:

 

     Local Discr: 2                   Remote Discr: 3

       Source IP: 192.168.0.102     Destination IP: 192.168.0.100

   Session State: Up                     Interface: GigabitEthernet3/1/1

 Min Trans Inter: 100ms            Act Trans Inter: 100ms

  Min Recv Inter: 100ms           Act Detect Inter: 2800ms

  Establish Time: 272:15:44         Last Down Time: 272:15:44

    Last Up Time: 272:15:45              Auth mode: None

    Connect Type: Direct                 Board Num: 3

        Protocol: OSPF

       Diag Info: No Diagnostic      

 

[RouterB]dis bfd sess v

 Total Session Num: 1            Init Mode: Active

 Session Working Under Ctrl Mode:

     Local Discr: 3                   Remote Discr: 2

       Source IP: 192.168.0.100     Destination IP: 192.168.0.102

   Session State: Up                     Interface: GigabitEthernet3/1/2

 Min Trans Inter: 100ms            Act Trans Inter: 100ms

  Min Recv Inter: 100ms           Act Detect Inter: 2400ms

  Establish Time: 271:50:23         Last Down Time: 271:50:23

    Last Up Time: 271:50:32              Auth mode: None

    Connect Type: Direct                 Board Num: 3

        Protocol: OSPF

       Diag Info: No Diagnostic