配置VLANIF接口BFD单跳检
组网需求如图6-22所示，RouterA和RouterB通过VLANIF接口实现三层互通。用户希望可以实现设备间链路故障的快速检测。图6-22配置VLANIF接口BFD单跳检测组网图https://download.huawei.com/mdl/image/download?uuid=f87fa9a3355a4f8c966763f74fc75fab
配置思路采用如下思路配置BFD单跳检测：在RouterA和RouterB上分别配置BFD会话，实现RouterA和RouterB间链路的检测。
操作步骤操作步骤
在RouterA和RouterB上创建VLAN，将Eth2/0/0接口配置为hybrid接口并加入VLAN（略）。
为VLANIF接口配置IP地址，使RouterA和RouterB之间实现三层互通（略）。
配置BFD单跳检测。
# 使能RouterA上的BFD功能并配置RouterA上的BFD会话。
<Huawei> system-view
sysname RouterA
bfd
quit
bfd atob bind peer-ip 10.1.1.6 interface vlanif 100
discriminator local 1
discriminator remote 2
commit
quit
# 使能RouterB上的BFD功能并配置RouterB上的BFD会话。
<Huawei> system-view
sysname RouterB
bfd
quit
bfd btoa bind peer-ip 10.1.1.5 interface vlanif 100
discriminator local 2
discriminator remote 1
commit
quit
验证配置结果。
# 配置完成后，在RouterA和RouterB上执行display bfd session all verbose命令，可以看到建立了一个单跳检测的BFD会话，且会话状态为Up。以RouterA上的显示为例：
display bfd session all verbose
--------------------------------------------------------------------------------
Session MIndex : 64 (One Hop) State : Up Name : atob
--------------------------------------------------------------------------------
Local Discriminator : 1 Remote Discriminator : 2
Session Detect Mode : Asynchronous Mode Without Echo Function
BFD Bind Type : Interface(Vlanif100)
Bind Session Type : Static
Bind Peer IP Address : 10.1.1.6
NextHop Ip Address : 10.1.1.6
Bind Interface : Vlanif100
FSM Board Id : 0 TOS-EXP : 7
Min Tx Interval (ms) : 1000 Min Rx Interval (ms) : 1000
Actual Tx Interval (ms): 1000 Actual Rx Interval (ms): 1000
Local Detect Multi : 3 Detect Interval (ms) : 3000
Echo Passive : Disable Acl Number : -
Destination Port : 3784 TTL : 255
Proc Interface Status: Disable Process PST : Disable
WTR Interval (ms) : -
Active Multi : 3 DSCP : -
Last Local Diagnostic: No Diagnostic
Bind Application : No Application Bind
Session TX TmrID : - Session Detect TmrID : -
Session Init TmrID : - Session WTR TmrID : -
Session Echo Tx TmrID: -
PDT Index : FSM-0 | RCV-0 | IF-0 | TOKEN-0
Session Description : -
--------------------------------------------------------------------------------
Total UP/DOWN Session Number : 1/0
# 对RouterA的Eth2/0/0接口执行shutdown操作，模拟链路故障。
interface ethernet 2/0/0
shutdown
quit
# 配置完成后，在RouterA和RouterB上执行display bfd session all verbose命令，可以看到建立了一个单跳检测的BFD会话，且会话状态为Down。以RouterA上的显示为例：
display bfd session all verbose
--------------------------------------------------------------------------------
Session MIndex : 64 （One Hop） State : Down Name : atob
--------------------------------------------------------------------------------
Local Discriminator : 1 Remote Discriminator : 2
Session Detect Mode : Asynchronous Mode Without Echo Function
BFD Bind Type : Interface(Vlanif100)
Bind Session Type : Static
Bind Peer IP Address : 10.1.1.6
NextHop Ip Address : 10.1.1.6
Bind Interface : Vlanif100
FSM Board Id : 0 TOS-EXP : 7
Min Tx Interval (ms) : 1000 Min Rx Interval (ms) : 1000
Actual Tx Interval (ms): 13000 Actual Rx Interval (ms): 13000
Local Detect Multi : 3 Detect Interval (ms) : 39000
Echo Passive : Disable Acl Number : -
Destination Port : 3784 TTL : 255
Proc Interface Status: Disable Process PST : Disable
WTR Interval (ms) : -
Active Multi : 3 DSCP : -
Last Local Diagnostic: Control Detection Time Expired
Bind Application : No Application Bind
Session TX TmrID : 16897 Session Detect TmrID : -
Session Init TmrID : 16898 Session WTR TmrID : -
Session Echo Tx TmrID: -
PDT Index : FSM-0 | RCV-0 | IF-0 | TOKEN-0
Session Description : -
--------------------------------------------------------------------------------
Total UP/DOWN Session Number : 0/1
配置文件
RouterA的配置文件
#
sysname RouterA
#
vlan batch 100
#
bfd
#
interface Vlanif100
ip address 10.1.1.5 255.255.255.0
#
interface Ethernet2/0/0
port hybrid pvid vlan 100
port hybrid untagged vlan 100
#
bfd atob bind peer-ip 10.1.1.6 interface Vlanif100
discriminator local 1
discriminator remote 2
commit
#
return
RouterB的配置文件
#
sysname RouterB
#
vlan batch 100
#
bfd
#
interface Vlanif100
ip address 10.1.1.6 255.255.255.0
#
interface Ethernet2/0/0
port hybrid pvid vlan 100
port hybrid untagged vlan 100
#
bfd btoa bind peer-ip 10.1.1.5 interface Vlanif100
discriminator local 2
discriminator remote 1
commit
#
return
{:6_290:} {:6_290:} {:6_267:} {:6_290:} {:6_267:} 感谢楼主分享实用资源。 {:6_267:}
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