H3c 静态路由配置及和BFD联动实现高速切换

H3c 静态路由配置及和BFD联动实现高速切换（运营商技术之一）

2012年3月13日

10:20

实验环境：2012H3C模拟器终极版

实验要求：正常情况下R1的环回口通过上面链路访问R2的环回口，路由为静态，当R1R2之间的链路出现故障后，能和BFD联动，实现毫秒级切换到下面链路，通过R10访问R2的环回口，保证业务不中断。

技能要求：学会静态路由的配置方法，并掌握通过静态路由备份技术，提供业务的高可靠性，掌握BFD原理和配置方法

脚本文档：（推荐自己写）

R1：
Sys
Int s0/2/1
Ip add 10.1.1.1 24
Int loo0
Ip add 172.16.1.1 32
Int s0/2/0
Ip add 12.1.1.1 24
bfd min-transmit-interval 500
bfd min-receive-interval 500
bfd detect-multiplier 9
Quit
ip route-static 192.168.1.1 32 s0/2/0 12.1.1.2 bfd control-packet
ip route-static 192.168.1.1 32 s0/2/1 10.1.1.10 preference 65

R2：
Sys
Int s0/2/1
Ip add 20.1.1.2 24
Int loo0
Ip add 192.168.1.1 32
Int s0/2/0
Ip add 12.1.1.2 24
bfd min-transmit-interval 500
bfd min-receive-interval 500
bfd detect-multiplier 9
Quit
ip route-static 172.16.1.1 32 s0/2/0 12.1.1.1 bfd control-packet
ip route-static 172.16.1.1 32 s0/2/1 20.1.1.10 preference 65

R10：
Sys
Int s0/2/1
Ip add 10.1.1.10 24
Int s0/2/2
Ip add 20.1.1.10 24
Quit
ip route-static 172.16.1.1 32 s0/2/1 10.1.1.1
ip route-static 192.168.1.1 32 s0/2/2 20.1.1.2

检查配置结果
[R1]display bfd session

Total Session Num: 1 Init Mode: Active

IPv4 Session Working Under Ctrl Mode:

LD/RD SourceAddr DestAddr State Holdtime Interface
12/12 12.1.1.1 12.1.1.2 Up 4200ms S0/2/0

在R1上查看静态路由
[R1]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

192.168.1.1/32 Static 60 0 12.1.1.2 S0/2/0

Static Routing table Status : < Inactive>
Summary Count : 1

Destination/Mask Proto Pre Cost NextHop Interface

192.168.1.1/32 Static 65 0 10.1.1.10 S0/2/1

在R1上打开BFD功能调试信息开关
debugging bfd event
debugging bfd scm
terminal debugging

当R1和R2之间的链路出现故障时，能快速切换到R10
[R2]int s0/2/0
[R2-Serial0/2/0]shu


%Mar 13 09:39:38:494 2012 H3C IFNET/3/LINK_UPDOWN: Serial0/2/0 link status is DOWN.
%Mar 13 09:39:38:494 2012 H3C IFNET/5/LINEPROTO_UPDOWN: Line protocol on the interface Serial0/2/0 is DOWN.
%Mar 13 09:39:38:494 2012 H3C IFNET/5/PROTOCOL_UPDOWN: Protocol PPP IPCP on the interface Serial0/2/0 is DOWN.
*Mar 13 09:39:38:494 2012 H3C BFD/7/EVENT: Receive Delete-sess, [Src:12.1.1.1,Dst:12.1.1.2,0/0,Serial0/2/0,Ctrl]

, Direct, Instance:0x0, Proto:STATIC
*Mar 13 09:39:38:494 2012 H3C BFD/7/SCM: Sess[12.1.1.1/12.1.1.2,11/11,S0/2/0,Ctrl], Oper: Delete application(STATIC)
*Mar 13 09:39:38:494 2012 H3C BFD/7/SCM: No application in session, delete session[12.1.1.1/12.1.1.2,11/11,S0/2/0,Ctrl]
*Mar 13 09:39:38:494 2012 H3C BFD/7/SCM: Send a DOWN-packet to peer to notify session-down
*Mar 13 09:39:38:494 2012 H3C BFD/7/SCM: Sess[12.1.1.1/12.1.1.2,11/11,S0/2/0,Ctrl], Oper: Delete
*Mar 13 09:39:38:494 2012 H3C BFD/7/SCM: Delete send-packet timer
*Mar 13 09:39:38:494 2012 H3C BFD/7/SCM: Delete detect-timer
*Mar 13 09:39:38:494 2012 H3C BFD/7/SCM: Delete session entry
*Mar 13 09:39:38:494 2012 H3C BFD/7/SCM: Delete session from IP hash table
*Mar 13 09:39:38:494 2012 H3C BFD/7/SCM: Delete session from bfd interface
*Mar 13 09:39:38:494 2012 H3C BFD/7/EVENT: Notify driver to stop receiving bfd control packet

查看R1上的静态路由表
[R1]display ip routing-table protocol static
Public Routing Table : Static
Summary Count : 1

Static Routing table Status : < Active>
Summary Count : 1

Destination/Mask Proto Pre Cost NextHop Interface

192.168.1.1/32 Static 65 0 10.1.1.10 S0/2/1

Static Routing table Status : < Inactive>
Summary Count : 0