backup interface BRI2/2
backup delay 5 10

These are all thats required to specify backup interface,  

Have you tested the BRI?

Have you added a route with a metric for the ISDN IP range

ip route 0.0.0.0 0.0.0.0  10

Can't think of anything else.


-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Thursday, July 19, 2001 8:29 AM
To: [EMAIL PROTECTED]
Subject: Why ISDN backup line come up ? [7:12920]


Hello all.
I have 2 routers connected using leased line.Now I am trying to put a ISDN
backup ,but the backup line does not come up.
The status of ISDN line when the serial int. is up ,is
 BRI2/2 is standby mode, line protocol is down
and should change to up upon going the serial line down but it's status
remain unchanged even the serial link goes down .
I have configued the serial int with
backup interface BRI2/2
backup delay 5 10
commands . Also i tried to simulate the situation by putting the modem at
Router A off to trigger the backup ISDN call but it does not happen and the
ISDN status remain in standyby mode only.
Can anybody help whether anyadditional command needs to be put up in either
Serial or Bri interfaces?
I am giving here th configuration of both the routers,
routerA#

 interface BRI2/2
 description "Backup connectivity "
 ip address 172.16.128.49 255.255.255.252
 no ip directed-broadcast
 encapsulation ppp
 dialer map ip 172.16.128.50 name routerB  xxxxx
 dialer-group 2
 isdn switch-type basic-net3

interface Serial1/3
 description "Leased link to RouterB"
 bandwidth 128
 backup delay 5 10
 backup interface BRI2/2
 ip address 172.16.128.17 255.255.255.252
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache



RouterB#
interface BRI1/2
 description "Backup connectivity for RouterA
 ip address 172.16.128.50 255.255.255.252
 encapsulation ppp
 no logging event subif-link-status
 dialer idle-timeout 3000
 dialer wait-for-carrier-time 60
 dialer map ip 172.16.128.49 name routerB YYYYYYY
 dialer-group 1
 no fair-queue

interface Serial0/0
 ip address 172.16.128.18 255.255.255.252
 logging event subif-link-status
 bandwidth 128

 hold-queue 75 in


Thanks in advance for help
Regards

Bware
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