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Wan DSL / ISDN Failover config

lgogniat1
Level 1
Level 1

Hi

I try to configure a cisco router to set up a failover between ADSL and ISDN lines.

The ISDN line only works if I call at the right dialer.

ADSL line also works if I call the associated dialer

The problem is that automatically switches between ISDN and ADSL is not working.

Can someone help me to understand the problem in my config file ?

Thank you,

Current configuration : 2635 bytes

!

version 12.4

service tcp-keepalives-in

service tcp-keepalives-out

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

hostname cisco

!

boot-start-marker

boot-end-marker

!

security authentication failure rate 3 log

logging console critical

enable secret 5 XXXXXXXXXXXXXXXX

!

no aaa new-model

!

resource policy

!

!

!

ip cef

ip tcp synwait-time 10

!

!

ip name-server 194.2.0.20

ip name-server 194.2.0.50

isdn switch-type basic-net3

username administrateur privilege 15 secret 5 XXXXXXXXXXXXXXXXXXXX

!

!

!

!

interface FastEthernet0

ip address XXX.XXX.XXX.XXX 255.255.255.248

no ip redirects

no ip unreachables

no ip proxy-arp

ip nat inside

ip nat enable

ip route-cache flow

duplex auto

speed auto

!

interface BRI0

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

encapsulation hdlc

ip route-cache flow

dialer pool-member 2

dialer idle-timeout 10

isdn switch-type basic-net3

isdn point-to-point-setup

no keepalive

!

interface FastEthernet1

!

interface FastEthernet2

!

interface FastEthernet3

!

interface FastEthernet4

!

interface FastEthernet5

!

interface FastEthernet6

!

interface FastEthernet7

!

interface FastEthernet8

!

interface ATM0

no ip address

no atm ilmi-keepalive

pvc 8/35 

  encapsulation aal5mux ppp dialer

  dialer pool-member 1

!

dsl operating-mode auto 

!

interface Vlan1

no ip address

!

interface Dialer0

ip unnumbered FastEthernet0

ip mtu 1470

encapsulation ppp

dialer pool 1

dialer-group 1

ppp authentication chap callin

ppp chap hostname XXX@XXX

ppp chap password 7 XXXXXXXXXX

!

interface Dialer1

ip address negotiated

ip nat outside

ip nat enable

encapsulation ppp

dialer pool 2

dialer idle-timeout 170

dialer string 0860XXXXXX

dialer-group 2

no keepalive

no cdp enable

ppp authentication chap callin

ppp chap hostname XXX@XXX

ppp chap password 7 XXXXXXXXXXXX

!

ip route 0.0.0.0 0.0.0.0 1.1.1.1

ip route 0.0.0.0 0.0.0.0 Dialer1 50

!

no ip http server

ip http timeout-policy idle 60 life 86400 requests 10000

ip nat inside source list 1 interface Dialer1 overload

!

access-list 1 permit XXXXXXXX 0.0.0.7

dialer-list 1 protocol ip permit

dialer-list 2 protocol ip permit

!

control-plane

!

banner login ^CAuthorized access only!

DIsconnect IMMEDIATELY if you are not an authorized user!^C

!

line con 0

login local

transport output telnet

line aux 0

login local

transport output telnet

line vty 0 4

privilege level 15

login local

transport input telnet

line vty 5 15

privilege level 15

login local

transport input telnet

!

end

2 Replies 2

Hi,

configure the following on your dialer associated with DSL

backup interface dialer (number of your dialer for ISDN)

HTH,

Smitesh

Hi,

Why don't you try to use IP SLA:

conf t

ip sla 1

icmp-echo 4.2.2.2

exit

ip sla schedule 1 life forever start-time now

track 123 rtr 1 reachability

ip route 4.2.2.2 255.255.255.255 Dialer0 (you have 1.1.1.1)

ip route 0.0.0.0 0.0.0.0 Dialer0 track 123

ip route 0.0.0.0 0.0.0.0 Dialer1 50

You would need to adjust/tweak NAT if these are going out to Internet.

Regards.

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