做用:毫秒级故障检查,一般结合三层协议(如静态路由、vrrp、ospf、BGP等)实现链路故障快速检查web
<Huawei>system-view //进入全局模式 [Huawei]sysname R1 //更名 [R1]undo info-center enable //关闭信息告警提示 [R1]interface LoopBack 0 //进入LoopBack 0接口 [R1-LoopBack0]ip address 1.1.1.1 24 //设置IP地址 [R1-LoopBack0]interface g0/0/0 //进入接口 [R1-GigabitEthernet0/0/0]ip address 12.1.1.1 24 //设置IP地址 [R1-GigabitEthernet0/0/0]interface g0/0/1 //进入接口 [R1-GigabitEthernet0/0/1]ip address 21.1.1.1 24 //设置IP地址 [R1-GigabitEthernet0/0/1]quit //退出 [R1]ip route-static 2.2.2.0 255.255.255.0 21.1.1.2 //配置静态路由 [R1]ip route-static 2.2.2.0 255.255.255.0 12.1.1.2 preference 70 //配置静态路由及优先级(默认为60)
<Huawei>system-view //进入全局模式 [Huawei]sysname R2 //更名 [R2]undo info-center en //关闭信息告警提示 [R2]interface LoopBack 0 //进入LoopBack 0接口 [R2-LoopBack0]ip address 2.2.2.2 24 //设置IP地址 [R2-LoopBack0]interface g0/0/0 //进入接口 [R2-GigabitEthernet0/0/0]ip address 12.1.1.2 24 //设置IP地址 [R2-GigabitEthernet0/0/0]interface g0/0/1 //进入接口 [R2-GigabitEthernet0/0/1]ip address 21.1.1.2 24 //设置IP地址 [R2-GigabitEthernet0/0/1]quit //退出 [R2]ip route-static 1.1.1.0 255.255.255.0 21.1.1.1 //配置静态路由 [R2]ip route-static 1.1.1.0 255.255.255.0 12.1.1.1 preference 70 //配置静态路由以及优先级(默认为60) R1
[R1]dis ip routing-table //查看路由表 Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 16 Routes : 14 Destination/Mask Proto Pre Cost Flags NextHop Interface 1.1.1.0/24 Direct 0 0 D 1.1.1.1 LoopBack0 1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0 1.1.1.255/32 Direct 0 0 D 127.0.0.1 LoopBack0 2.2.2.0/24 Static 60 0 RD 21.1.1.2 GigabitEthernet 默认优先级的线路 0/0/1 12.1.1.0/24 Direct 0 0 D 12.1.1.1 GigabitEthernet 0/0/0 12.1.1.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 12.1.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 21.1.1.0/24 Direct 0 0 D 21.1.1.1 GigabitEthernet 0/0/1 21.1.1.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 21.1.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 [R1]
[R1]bfd //全局使能BFD [R1-bfd]quit //退出 [R1]bfd 1 bind peer-ip 21.1.1.2 source-ip 21.1.1.1 //配置BFD组1 [R1-bfd-session-1]discriminator local 1 //本地标识1(标识须要相互堆成) [R1-bfd-session-1]discriminator remote 2 //对端标识2 [R1-bfd-session-1]commit //确认提交 [R1-bfd-session-1]quit //退出 [R1]ip route-static 2.2.2.0 24 21.1.1.2 track bfd-session 1 //静态路由调用BFD
[R2]bfd //全局使能BFD [R2-bfd]quit // 退出 [R2]bfd 1 bind peer-ip 21.1.1.1 source-ip 21.1.1.2 //配置BFD组1 [R2-bfd-session-1]discriminator local 2 //本地标识2(标识须要相互堆成) [R2-bfd-session-1]discriminator remote 1 //对端标识1 [R2-bfd-session-1]commit //确认提交 [R2-bfd-session-1]quit //退出 [R2]ip route-static 1.1.1.0 24 21.1.1.1 track bfd-session 1 //静态路由调用BFD
[R1]dis ip routing-table //查看路由表 Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 16 Routes : 14 Destination/Mask Proto Pre Cost Flags NextHop Interface 1.1.1.0/24 Direct 0 0 D 1.1.1.1 LoopBack0 1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0 1.1.1.255/32 Direct 0 0 D 127.0.0.1 LoopBack0 2.2.2.0/24 Static 70 0 RD 12.1.1.2 GigabitEthernet //线路已切换过来 0/0/0 12.1.1.0/24 Direct 0 0 D 12.1.1.1 GigabitEthernet 0/0/0 12.1.1.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 12.1.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 21.1.1.0/24 Direct 0 0 D 21.1.1.1 GigabitEthernet 0/0/1 21.1.1.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 21.1.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 [R1]
[R1]dis bfd session all //查看BFD信息 -------------------------------------------------------------------------------- Local Remote PeerIpAddr State Type InterfaceName -------------------------------------------------------------------------------- 1 2 21.1.1.2 Down S_IP_PEER - -------------------------------------------------------------------------------- Total UP/DOWN Session Number : 0/1 [R1]
[R1]dis bfd session all verbose //查看BFD详细信息 -------------------------------------------------------------------------------- Session MIndex : 256 (Multi Hop) State : Down Name : 1 -------------------------------------------------------------------------------- Local Discriminator : 1 Remote Discriminator : 2 Session Detect Mode : Asynchronous Mode Without Echo Function BFD Bind Type : Peer IP Address Bind Session Type : Static Bind Peer IP Address : 21.1.1.2 Bind Interface : - Track Interface : - Bind Source IP Address : 21.1.1.1 FSM Board Id : 0 TOS-EXP : 7 Min Tx Interval (ms) : 1000 Min Rx Interval (ms) : 1000 Actual Tx Interval (ms): 10500 Actual Rx Interval (ms): 10500 Local Detect Multi : 3 Detect Interval (ms) : - Echo Passive : Disable Acl Number : - Destination Port : 3784 TTL : 254 Proc Interface Status : Disable Process PST : Disable WTR Interval (ms) : - Active Multi : 3 Last Local Diagnostic : Control Detection Time Expired Bind Application : No Application Bind Session TX TmrID : 1036 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 : 0/1 [R1]