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failover on 2811 with 2 ISPs

Hi,

I have a cisco 2811 router with 2 wan ethernet ports and 4 lan ethernet ports, 2 internet connections (1 is FTTC (vdsl) connection so I configured pppoe dialer and 2 is Virgin media connection to the VM router so its simple ethernet connection with static public ip address) , both connections works fine.

I configured local network with NAT on FTTC connection (tried it on VM as well) and that workes fine as well.

What I am trying to achive is  use wan1 (fttc) connection by default for NAT and if it goes down - switch to wan2 automaticaly.

Idealy I would need to have part of local network to be NATing to wan1 and, if wan1 goes down, failover to wan2 and other part of local network to NAT to wan2 and, if wan2 goes down, to failover to wan1.

Router details: Version 12.4(13r)T

Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(12), RELEASE SOFTWARE (fc1)

System image file is "flash:c2800nm-advipservicesk9-mz.124-12.bin"

I configured the router as in example below using route maps and track command and the issue is that dialer (wan1 fttc connection) goes down, it swithes over to wan2 and doesnt go back to wan1 (dialer), its just doesnt dial fttc connection.

  this is my config:

interface FastEthernet0/0

description FTTC

no ip address

ip nat outside

ip virtual-reassembly

duplex auto

speed auto

pppoe enable group global

pppoe-client dial-pool-number 1

!

interface FastEthernet0/1

description $ETH-WAN$

ip address 94.174.*** 255.255.255.248

ip nat outside

ip virtual-reassembly

duplex auto

speed auto

interface Dialer1

ip address negotiated

ip mtu 1492

ip nat outside

ip virtual-reassembly

encapsulation ppp

load-interval 30

dialer pool 1

dialer-group 1

ppp authentication chap callin

ppp chap hostname ***********@itp.4adsl.net

ppp chap password 0 *****

ppp ipcp dns request

route-map VIRGIN permit 10

match ip address 1

match interface fast 0/1

exit

route-map ENTA permit 10

match ip address 1

match interface Dialer1

exit

ip nat inside source route-map VIRGIN interface FastEthernet 0/1 overload

ip nat inside source route-map ENTA interface Dialer1 overload

ip sla 100

icmp-echo 4.2.2.2 source-interface Fastethernet0

timeout 500

frequency 3

track 100 rtr 100 reachability

delay down 10 up 20

ip route 0.0.0.0 0.0.0.0 Dialer1 track 100

ip route 0.0.0.0 0.0.0.0 FastEthernet 0/1 94.174.**** 10

-----------------------------------------

Any input would be appriciated

Thanks

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