浮动静态路由配置步骤：
1、正确配置主干线路，保证其能正常通信
2、配置主干线路的动态路由
3、正确配置备份线路，保证其能正常通信
4、配置通过备份线路的浮动静态路由
ip route 目地子网地址 子网掩码 相邻路由器相邻端口地址 权值
其中，权值数值越高其路由优先权越低权值范围在1-255之间
实例：
CISCO 2501-above的配置
Current confignration:!version 11.2no service udp-small-servers
no service tcp-small-servers
!
hostname above
!
enable secret 5 $1$O1aq$KxgpIA0Eulqug8SbCm6rd1
enable password cisco
!
username down password 7 095C5E19
chat-scrip lab ABORT ERROR ABORT BUSY ABORT "NO ANSWER" "" "AT H" OK "ATDT \T" TIMEOUT 60 CONNECT \c
!
interface Ethernet0
ip address 192.192.193.1 255.255.255.0
!interface Serial0
iu address 192.192.192.1 255.255.255.0
bandwidth 64
clockrate 64000
!
interface Serial1
no ip address
shutdown
interface Asyncl
ip address 166.71.70.1 255.255.255.0
encapsulation pppasync dynamic address
async dynamic routing
async mode dedicated
dialer in-banddialer ip 166.71.70.2 name down modem-script lab broadcast 3631
dialer-group 1
no cdp enableppp authentication chap
!router rip
network 192.192.192.0
network 192.192.193.0
!
no ip classless
ip route 0.0.0.0 0.0.0.0 166.71.70.2 150
ip route 192.192.191.0 255.255.255.0 166.71.70.2 150 ["4、配置通过备份线路的浮动静态路由 ip route 目地子网地址 子网掩码 相邻
路由器相邻端口地址 权值 其中，权值数值越高其路由优先权越低权值范围在1-255之间 "]
dialer-list 1 protocol ip permit
!line con 0
line aux 0
modem InOutmodem autoconfigure discoverystopbits 1rxspeed 38400txspeed 38400flowcontrol hardware
line vty 0 4
no login
!
end
Cisco 2501-down 的配置Current configuration:
!
version 11.2no service udp-small-serversno service tep-small-servers!hostname down!enable secret 5 $1$m8S4
$InrkhnJDtCVtSvTpXO8v/0enable password cisco
!
username above password 7 095C5E19
chat-script lab ABORT ERROR ABORT BUSY ABORT "NO ANSWER" "" "AT H" OK "ATDT \T" TIMEOUT 60 CONNECT \c
!
interface Ethernet0
ip address 192.192.191.1 255.255.255.0
!
interface Serial0
ip address 192.192.192.3 255.255.255.0
!
interface Serial1
no ip address
shutdown
!
interface Asyncl
ip address 166.71.70.2 255.255.255.0encapsulation pppasync dynamic addressasync dynamic routingasync mode dedicateddialer in
-banddialer map ip 166.71.70.1 name above modem-script lab broadcast 3621
dialer-group 1
no cdp enable
ppp authentication chap
!
router rip network 192.192.192.0
network 192.192.191.0
!
no ip classless
ip route 0.0.0.0 0.0.0.0 166.71.70.1 150
ip route 192.192.193.0 255.255.255.0 166.71.70.1 150
dialer-list 1 protocol ip permit
!
line con 0
line aux 0
modem InOutmodem autoconfigure discovery
stopbits 1
rxspeed 38400
txspeed 38400
flowcontrol hardware
line vty 0 4
no login
!
