04-27-2010 02:17 AM - edited 03-04-2019 08:17 AM
we have configure ISDB bri DDR for backup of primary serial link
following are the configurations
interface Serial0/0
description ---------To remote router 128K LL----------
ip address 192.168.100.1 255.255.255.0
encapsulation ppp
backup delay 10 30
backup interface BRI0/0
interface BRI0/0
no ip address
encapsulation ppp
dialer pool-member 1
dialer pool-member 2
isdn switch-type basic-net3
no keepalive
ppp authentication chap
interface Dialer1
description ------to remote router backup------
ip address 172.168.100.1 255.255.255.0
encapsulation ppp
dialer pool 1
dialer remote-name remoterouter
dialer-group 1
no keepalive
ppp authentication chap
04-27-2010 02:27 AM
Hello Sunil,
have you added floating static routes using Dialer1 as outgoing interface?
also the backup command should point to Dialer1 instead of the BRI interface in order to complete the configuration, because you are using dialer interfaces and not BRI directly (legacy DDR)
see
you can troubleshoot the issue using the following debug:
terminal monitor
debug dialer
debug ppp neg
debug ppp auth
shut the primary link and try to ping an host on remote network
Hope to help
Giuseppe
04-27-2010 05:46 AM
Hi Giuseppe
thanks for reply
I tried that solution but after I was remove backup interface bri 0/0 and pointing dialer as a backup interface, BRI interface changed down to up immediately and both serial and BRI interfaces were UP simultaneously.
But we want BRI as a backup and whenever primary serial will down then only BRI should UP.
After changing the setting followings are the outputs
Mainrouter#config t
Enter configuration commands, one per line. End with CNTL/Z.
Mainrouter(config)#interface serial 0/0
Mainrouter(config-if)#no backup interface bri 0/0
Mainrouter(config-if)#backup interface dialer1
6)
Output
Command base-URL was: /level/15/exec/-
Complete URL was: /level/15/exec/-/show/interface/bri/0\/0/CR
Command was: show interface bri 0/0
________________________________________
BRI0/0 is up, line protocol is up (spoofing)
Hardware is PQUICC BRI
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
Last input 00:00:07, output never, output hang never
Last clearing of "show interface" counters 44w2d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/16 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 48 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
90160 packets input, 447137 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
90168 packets output, 497216 bytes, 0 underruns
0 output errors, 0 collisions, 338 interface resets
0 output buffer failures, 0 output buffers swapped out
187 carrier transitions
________________________________________
command completed.
7)
Mainrouter#config t
Enter configuration commands, one per line. End with CNTL/Z.
Mainrouter(config)#interface serial 0/0
Mainrouter(config-if)#backup interface dialer1
Mainrouter(config-if)#no backup interface dialer1
Mainrouter(config-if)#backup interface bri 0/0
8)
Output
Command base-URL was: /level/15/exec/-
Complete URL was: /level/15/exec/-/show/interface/bri/0\/0/CR
Command was: show interface bri 0/0
________________________________________
BRI0/0 is standby mode, line protocol is down
Hardware is PQUICC BRI
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
Last input 00:00:05, output never, output hang never
Last clearing of "show interface" counters 44w2d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/16 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 48 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
90197 packets input, 447285 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
90205 packets output, 497364 bytes, 0 underruns
0 output errors, 0 collisions, 338 interface resets
0 output buffer failures, 0 output buffers swapped out
188 carrier transitions
________________________________________
command completed.
_______________________________________
Please refer the above output and sugget the same
Thanks in advance....
04-27-2010 06:05 AM
Hello Sunil,
the fact that BRI interface stays up is not a problem because it is the dialer interface that is in charge, the BRI has no IP address so it cannot be an alternate path for IP traffic alone.
if you see in previous post I had provided a link with an example that fits with your needs
so I recommend to use backup interface Dialer1 not BRI
Hope to help
Giuseppe
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