가입자쪽이나 라우팅이 두개또는 꼬였을때 CEF Clear해보는것
configration은 정상이지만 라우팅이 두개로 잡혀 자꾸만 다른곳으로 
라우팅이 될때 SHUT DOWN 해보든지 CEF를 CLEAR해본다

cmd=clear ip route * 
cmd=configure terminal 
cmd=no router ospf 200 
cmd=router ospf 200 
cmd=redistribute connected metric 10 subnets 
cmd=redistribute static metric 20 subnets 
cmd=network 210.122.174.0 0.0.0.255 area 0 
cmd=write 
cmd=show configuration 
cmd=clear ip cef * prefix-statistics 
cmd=clear ip cef 10.174.253.86 255.255.255.252 prefix-statistics 
cmd=clear ip cef 10.174.253.86 prefix-statistics 
cmd=show configuration 
cmd=configure terminal 
cmd=no ip cef 
cmd=clear ip cef * prefix-statistics 
cmd=ip cef 
cmd=configure terminal 
cmd=no ip cef 
cmd=show configuration 
cmd=write 
cmd=show configuration 
cmd=clear ip cef * prefix-statistics 
cmd=configure terminal 
cmd=ip cef 
cmd=no ip cef 
cmd=connect 10.174.253.86	
cmd=ip route 210.109.254.64 255.255.255.192 10.174.253.86 
cmd=write 
cmd=show configuration 
cmd=clear ip route * 
cmd=configure terminal 
cmd=interface Serial 4 0 0 
cmd=no ip address 10.174.253.86 255.255.255.252 
cmd=show configuration 
cmd=configure terminal 
cmd=interface Serial 4 0 0 
cmd=no ip address 10.174.253.86 255.255.255.255 
cmd=show configuration 
cmd=shutdown 
cmd=no shutdown 
cmd=configure terminal 
cmd=ip cef 
cmd=write