06-28-2002 02:29 PM - edited 03-01-2019 11:15 PM
I have done a configuration for E1 ISDN PRI backup for my leased line to my client office.I have done for BRI backup but not sure for PRI. Is my config below is correct?
_______________________________________
Office Router :-
isdn switch-type primary-net5
!
controller E1 1/0
pri-group timeslots 1-30
!
int s0/0
description # lease line to client #
ip address 192.168.200.1 255.255.255.252
backup delay 10 2
backup interface Dialer1
encapsulation ppp
!
int e0/0
description # internal lan connection #
ip address xxx.xxx.xxx.xxx 255.255.255.0
!
int s1/0:15
description # backup link to Client #
no ip address
encapsulation ppp
isdn switch-type primary-net5
dialer pool-member 1
ppp authentication chap
!
interface Dialer1
description # backup link to Client #
ip unnumbered Serial0/0
encapsulation ppp
dialer remote-name CLIENT
dialer string xxxxxxxx
dialer pool 1
dialer load-threshold 1
dialer-group 1
ppp authentication chap
ppp multilink
!
ip classless
ip route xxx.xxx.xxx.xxx 255.255.255.0 Serial0/0
ip route xxx.xx.xxx.xxx
255.255.255.0 Dialer1 2
!
access-list 1 permit any
dialer-list 1 protocol ip permit
!
_______________________________________
Client router :-
isdn switc-type primary-net5
!
controller E1 1/0
pri-group timeslots 1-30
!
int s0/0
description # lease line to My Office #
ip address 192.168.200.2 255.255.255.252
backup delay 10 2
backup interface Dialer1
encapsulation ppp
!
int e0/0
description # Client internal lan connection #
ip address xxx.xxx.xxx.xxx 255.255.255.0
!
int s1/0:15
description # backup link to My Office#
no ip address
encapsulation ppp
isdn switch-type primary-net5
dialer pool-member 1
ppp authentication chap
!
interface Dialer1
description # backup link to My Office#
ip unnumbered Serial0/0
encapsulation ppp
dialer remote-name MyOffice
dialer string xxxxxxxx
dialer pool 1
dialer load-threshold 1
dialer-group 1
ppp authentication chap
ppp multilink
!
ip classless
ip route xxx.xxx.xxx.xxx
255.255.255.0 Serial0/0
ip route xxx.xxx.xxx.xxx
255.255.255.0 Dialer1 2
!
access-list 1 permit any
dialer-list 1 protocol ip permit
!
06-28-2002 02:29 PM
On the routers you should not
use IP unnumbered to serial 0/0, since
if that interface goes down that address
may not be useable. You can apply the
address to a loopback interface, and let
the serial and dialer interfaces use it.
You shouldn't use the backup command
on both sides; if the line goes down, you
only want one end to initiate the connection;
otherwise, there is a chance that both
will try to call each other.
For that same reason, you should probably
only have one side with a phone number to
dial, to avoid contention with the dialing.
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