cisco router 1720 adsl with isdn backup HELP!!!!!plase!!!!!

[paskuin]

Hi guys.

I am trying to set up a 1720 cisco with adsl and isdn backup. I don not know what i am doing wrong, but, the fact is that I am not able to set it up.

Does anybody know about a proper configuration?

regards.

 

[ChrisAC]

How far have you got?? ************************
Chris Andrew, CCNA
chrisac@gmx.co.uk
************************

 

[jeter]

post a config Jeter@LasVegas.com
J.Fisher CCNA

 

[paskuin]

exactly this far.
backup works, not NAT.
only NAT works in the ISDN chanel, not in ATM


#sh run
Building configuration...

Current configuration : 1888 bytes
!
version 12.2
no parser cache
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname xxxxx!
logging rate-limit console 10 except errors
enable secret
enable password

memory-size iomem 25
ip subnet-zero
ip domain-name easynet.es
ip name-server
ip name-server
!
no ip dhcp-client network-discovery
isdn switch-type basic-net3
!
!
!
interface ATM0
backup interface Dialer0
no ip address
ip nat outside
atm vc-per-vp 256
no atm ilmi-keepalive
pvc 0/x
oam-pvc manage
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
dsl operating-mode auto
no fair-queue
hold-queue 224 in
!
interface BRI0
no ip address
ip nat outside
encapsulation ppp
dialer rotary-group 0
isdn switch-type basic-net3
no cdp enable
!
interface FastEthernet0
ip address xxxxxxx
ip nat inside
speed auto
half-duplex
!
interface Dialer0
ip address negotiated
ip nat outside
encapsulation ppp
dialer in-band
dialer idle-timeout 121
dialer string xxxxxxx
dialer hold-queue 10
dialer load-threshold 128 either
dialer-group 1
no cdp enable
ppp authentication pap callin
ppp pap sent-username xxxxx password xxxxxxxxxx
ppp multilink
!
interface Dialer1
ip address negotiated
ip nat outside
ip nat outside
dialer pool 1
dialer-group 1
!
ip nat inside source list 100 interface Dialer0 overload
ip nat inside source list 101 interface Dialer1 overload
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer0
ip route 0.0.0.0 0.0.0.0 Dialer1 10
no ip http server
!
access-list 100 permit ip xxxxxxxxxxxxxxxxx any
access-list 101 permit ip xxxxxxxxxxxxxxxxx any
dialer-list 1 protocol ip permit
!
line con 0
line aux 0
line vty 0 4
password xxxxxxxxxxxxxxx
login
!
no scheduler allocate
end

 

[jeter]

something doesn't look right here.
your ATM interface is used for what? I see nothing there.

interface ATM0
ip nat outside

Fastethernet0
ip nat inside

ip nat inside source list 100 interface interface ATM0 overload

access-list 1 permit any

Remove the interface dialer1 ip nat outside and verify
Jeter@LasVegas.com
J.Fisher CCNA

 

[UNIX72]

Paskin remove nat outside from the ATM interface also you might have to change dialer-group 1 to 2 on the dialer1 interface. I have the same setup with a 1750 router but I use pppoe and created a subinterface (point to point) on the ATM interface. Jeter you can use a ATM over DSL. Cisco ADSL WIC's are configure through the ATM interface. Please let me know if this works i played around with DSL routers alot.

 

[paskuin]

thanks a lot, nut I am afraid did not work
anyone of you guys have a isdn backup configuration with ADSL?
my config , I think, does not make a lot of sense, but works till half way.
any ideas?

 

[blahblip]

I believe you might need to use a virtual-template rather than dialer interfaces. The dialer interface when used with the ATM will spoof the ATM int, so regardless of the state of the ATM int the default route will still apply because the interface still appears to be up.

Dialer0 is up, line protocol is up (spoofing)

ATM0 is administratively down, line protocol is down

As mentioned the interface of interest is the virtual-access which holds cloned information from the dialer/virtual-template.

 

[blahblip]

clarification on what I mentioned before. indeed you will be better of using a virtual template and setting the default route to use the framed IP (fixed). This will allow you to setup floating static routes for ISDN backup, using the dialer 0 int.