backup wan connection not work

[b1723651]

Hi all,

I'm testing ADSL+3G dualwan, first try to setup ADSL as primary and 3G as backup line. I've setup Fix IP + 3G to work with similar commands. (that is if I unpluged cable of "fix ip" line, all traffices will goes to 3G)

but when I replase "fix ip" line with ADSL, it does not work anymore, can anyone help me diagnose what was wrong? thanks!

Building configuration...

Current configuration : 2807 bytes
!
! Last configuration change at 12:24:03 UTC Thu Dec 30 2010 by rr
!
version 15.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Store
!
boot-start-marker
boot system flash:/c2800nm-advsecurityk9-mz.150-1.M4.bin
boot-end-marker
!
!
no aaa new-model
!
!
!
!
dot11 syslog
ip source-route
!
!
ip cef
!
!
!
multilink bundle-name authenticated
!
!
chat-script gsm "" "ATDT*98*1#" TIMEOUT 60 "CONNECT"
!
!
!
!
license udi pid CISCO2811 sn FHKxxxxxx
archive
 log config
  hidekeys
username rrr privilege 15 secret 5 $1$xxx
!
redundancy
!
!
no ip ftp passive
!
track 1 ip sla 1 reachability
! 
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 172.16.0.201 255.255.192.0
 ip nat inside
 ip virtual-reassembly
 ip tcp adjust-mss 1412
 duplex auto
 speed auto
 !
!
interface FastEthernet0/1
 description $ETH-WAN$
 no ip address
 duplex auto
 speed auto
 pppoe enable group global
 pppoe-client dial-pool-number 1
 !
!
interface Cellular0/2/0
 no ip address
 ip nat outside
 ip virtual-reassembly
 encapsulation ppp
 dialer in-band
 dialer pool-member 2
 async mode interactive
 !
!
interface Dialer0
 ip address negotiated
 ip mtu 1452
 ip nat outside
 ip virtual-reassembly
 encapsulation ppp
 dialer pool 1
 dialer-group 1
 ppp authentication chap pap callin
 ppp chap hostname username
 ppp chap password 0 password
 ppp pap sent-username usrename password 0 password
 !
!
interface Dialer1
 ip address negotiated
 ip nat outside
 ip virtual-reassembly
 encapsulation ppp
 dialer pool 2
 dialer idle-timeout 0
 dialer string gsm
 dialer persistent
 ppp chap hostname 3gnet
 ppp chap password 0 3gnet
 ppp ipcp dns request
 !
!
ip local policy route-map track-primary-if
ip forward-protocol nd
ip http server
ip http authentication local
no ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
!
ip nat inside source list 1 interface Dialer0 overload
ip route 0.0.0.0 0.0.0.0 FastEthernet0/1 track 1
ip route 0.0.0.0 0.0.0.0 Dialer0
ip route 0.0.0.0 0.0.0.0 Dialer1 253
!
ip sla 1
 icmp-echo 8.8.8.8 source-interface FastEthernet0/1
ip sla schedule 1 life forever start-time now
access-list 1 remark CCP_ACL Category=2
access-list 1 permit 172.16.0.0 0.0.63.255
access-list 100 remark CCP_ACL Category=0
access-list 100 permit icmp any host 8.8.8.8
dialer-list 1 protocol ip permit
!
!
!
route-map track-primary-if permit 1
 match ip address 100
 set interface FastEthernet0/1 Null0
!
!
!
control-plane
 !
!
!
line con 0
line aux 0
line 0/2/0
 script dialer gsm
 modem InOut
 no exec
 transport input all
 rxspeed 3600000
 txspeed 384000
line vty 0 4
 privilege level 15
 login local
 transport input telnet
!
scheduler allocate 20000 1000
end

[Shelley Bhalla]

A couple of things to check:

1. When you remove the cable, See what the NAT translations are. Do they clear or not. Try to clear the NAT translations

2. Check the default route once the ADSL cable is taken out does the default route point to the new dialer (3g)

3. Does it work when you clear the dialer interface (ADSL) clear inter dial 0.

4. What happens if you shut the ATM port down , Still same results?

If all these wont give you a hint, I think a Cisco TAC case should be open for further support.

Shelley

Cisco TAC.