07-08-2003 02:21 PM - edited 03-02-2019 08:42 AM
If anyone can help it would be much appreciated.
I am using a cisco 1721 with ADSL ip stream as our primary connection.
I am using a default route pointing down dialer 1 as my primary route.I have also configured a secondary default route pointing down dialer 2 with a metric of 100.My objjective is to use dial backup on the atm interface and use the backup sttatement backup interface dialer 2.When I pull the adsl and the atm goes downn down,a backup call is made but the interesting traffic still seems to want to use the primary default route which points downn dialer 1 instead of using dialer 2 which is the isdn backup.I am using 12.3.1 IOS which is the latest version.I am also using RIP to advertise the network downn dialer 2 because our backup core solution is a Perle ras server which can only do RIP.
Can anyone advise why the floating static route is not working.Please see config below.
wr t
Building configuration...
Current configuration : 2156 bytes
!
version 12.3
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname WIMBLEDON
!
enable secret xxxx
enable passwordxxxx
!
ip subnet-zero
!
!
no ip domain lookup
!
isdn switch-type basic-net3
!
!
!
!
interface ATM0
no ip address
backup interface Dialer2
atm vc-per-vp 2048
no atm ilmi-keepalive
pvc 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
dsl operating-mode auto
hold-queue 224 in
!
interface BRI0
description ISDN Dial Backup
no ip address
encapsulation ppp
dialer pool-member 2
isdn switch-type basic-net3
isdn sending-complete
no cdp enable
ppp authentication chap callin
!
interface FastEthernet0
ip address 10.x.x.x 255.255.255.224
ip nat inside
speed auto
no keepalive
hold-queue 100 out
!
interface Dialer1
ip address negotiated
ip nat outside
encapsulation ppp
dialer pool 1
ppp authentication chap pap callin
ppp chap hostname xxxxx
ppp chap password 7 14151D130916393C2B3A3F11
ppp pap sent-username xxxxxpassword xxxxx
!
interface Dialer2
description connected to Internet
ip address negotiated
ip accounting output-packets
encapsulation ppp
no ip split-horizon
dialer pool 2
dialer idle-timeout 600
dialer enable-timeout 120
dialer string 02086051881
dialer hold-queue 10
dialer-group 1
no cdp enable
ppp authentication chap pap callin
ppp chap hostname xxxx
ppp chap password xxxxx
ppp pap sent-username xxxpassword xxxxx
!
ppp multilink
ppp multilink load-threshold 1 either
!
router rip
version 2
no validate-update-source
passive-interface FastEthernet0
passive-interface Dialer1
network 10.0.0.0
neighbor 10.98.169.1
no auto-summary
!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
ip route 0.0.0.0 0.0.0.0 dialer2
ip http server
!
!
dialer-list 1 protocol ip permit
!
!
line con 0
exec-timeout 120 0
password xxx
login
stopbits 1
line aux 0
line vty 0 4
exec-timeout 120 0
password xxxx
login
length 25
!
scheduler max-task-time 5000
!
end
07-08-2003 02:34 PM
Not saying that I know for sure, but I think your problem is that the static route to dialer1 never get's invalid. Because that the interface dialer1 dont get down, it's the ATM-interface that goes down. So if you get rid of the dialer1 configuration and specify the info direct on the ATM interface I suppose it should work. Is that doable?
07-08-2003 02:43 PM
Is there anyway of bypassing this without removing the dialer interface 1 configuration as all oursites are configured this way for adsl ip stream.
Do you know if it is possible to make this config work direct on the ATM interface by deleting the dialer interface.
07-08-2003 02:53 PM
Hmm sorry but ATM-configuration isnt my speciality.
Hmm *thinking out loud* since the Dialer2 interface is down in normal use, you might want to try making the floating static so that interface is the first choice. Since it's normally down it should invlidate the route and make the route to dialer1 work. when the ATM is down the dialer2 gets active and so should the route as well.
just thinking...might work. but I'm not that experienced in this sort of configurations.
07-08-2003 06:16 PM
Here's a thought - eliminate interface Dialer 2. Make the BRI interface part of dialer pool 1 instead of dialer pool 2. Increase the priority of interface ATM0 with the command "dialer pool-member 1 priority 10". Delete the backup interface command on ATM0. This will (I think) give you a single dialer interface, which uses the ATM interface if it is available. If the ATM interface is not available, the dialer interface will use the lower priority interface, BRI0.
I can't test this in a lab. I am curious to see if this will work.
Good luck.
Mark
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