Cisco 1841 with ADSL backup
- From: j.kost@xxxxxxxxx
- Date: Tue, 8 Jan 2008 05:20:07 -0800 (PST)
Hello,
I'm having trouble configuring a Cisco 1841 with an SDSL connection.
The idea is that when the SDSL connection goes down, the ADSL
connections comes up, and takes over.
I already have this working with an ADSL connection with ISDN backup.
This works fine.
I'm using the following config:
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname XXXX
!
boot-start-marker
boot-end-marker
!
logging buffered 51200 warnings
enable secret bonbon
!
no aaa new-model
ip cef
!
ip dhcp excluded-address 192.168.1.1
!
ip dhcp pool solcon
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 212.45.32.3
!
!
ip sla monitor 1
type echo protocol ipIcmpEcho 212.45.32.3
timeout 1000
threshold 2
frequency 3
ip sla monitor schedule 1 life forever start-time now
username solcon password bonbon
!
!
controller DSL 0/0/0
mode atm
line-term cpe
line-mode 2-wire line-zero
dsl-mode shdsl symmetric annex B
line-rate auto
!
!
track 1 rtr 1 reachability
!
!
interface FastEthernet0/0
description LAN klant
ip address 192.168.1.1 255.255.255.0
duplex auto
speed auto
no keepalive
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
no keepalive
!
interface ATM0/0/0
no ip address
no atm ilmi-keepalive
pvc 0 0/36
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
!
interface ATM0/1/0
no ip address
no atm ilmi-keepalive
dsl operating-mode auto
pvc 0 0/36
encapsulation aal5mux ppp dialer
dialer pool-member 2
!
!
interface Dialer0
mtu 1492
ip unnumbered FastEthernet0/0
encapsulation ppp
ip tcp adjust-mss 1452
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication pap callin
ppp pap sent-username XXXX password XXXX
!
interface Dialer1
mtu 1492
ip unnumbered FastEthernet0/0
encapsulation ppp
ip tcp adjust-mss 1452
dialer pool 2
dialer-group 2
no cdp enable
ppp authentication pap callin
ppp pap sent-username XXXX password XXXX
!
ip local policy route-map LOCAL-POLICY
ip route 0.0.0.0 0.0.0.0 Dialer0 track 1
ip route 0.0.0.0 0.0.0.0 Dialer1 254
!
no ip http server
ip http authentication local
ip http timeout-policy idle 5 life 86400 requests 10000
!
access-list 101 permit icmp any host 212.45.32.3
dialer-list 1 protocol ip permit
dialer-list 2 protocol ip permit
route-map LOCAL-POLICY permit 10
match ip address 101
set interface Dialer0 Null0
!
!
control-plane
!
!
line con 0
login local
line aux 0
line vty 0 4
privilege level 15
login local
transport input telnet
line vty 5 15
privilege level 15
login local
transport input telnet
!
scheduler allocate 20000 1000
end
This is used in an MPLS enviroment. That is the reason the local IP-
adresses are used.
The problem i am having in comparisation to the ADSL/ISDN config, is
that because i'm not using DDR, both ADSL lines are always up.
When i have another location in the same MPLS enviroment, and I ping
the IP-address of this location (192.168.1.1) the route is shorter via
the ADSL connection (supposed to be backup), instead of going through
the SDSL connection.
I cannot change the routes. This is the providers core networks, so
that is not possible.
What i am looking to use is an dialer idle-timeout. So that the ADSL
connection goes down when not used, and goes up when the SDSL
connection fails.
I tried it, but because of LCP echo (part of PPP), the ADSL connection
keeps receiving packets, and therefore is not idle.
Anybody got any ideas?
.
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