04-17-2006 11:54 PM - edited 03-03-2019 12:26 PM
I have an Bri0/0 interface configured as backup for serial 0/0 interface. When i manually make the leased line down , the ISDN is not firing.
But when i do a test call, i see ISDN is firing.
Also i see that the BRI0/0 interface status says shutdown. I tried clearing the BRI interface, still it remains the same.
Can you please tell me what the problem might be?
04-18-2006 12:06 AM
Hello,
if the BRI shows shutdown, then you have administratively set it to shutdown. Please configure
interface Bri0/0
no shutdown
On the other hand I would assume a test call would not work in this case anyhow, so I am unclear as to what the status really is. can you post your relevant router config?
Hope this helps! Please rate all posts.
Regards, Martin
04-18-2006 12:14 AM
Thanx for replying.
No the Bri0/0 interface is not in shut mode.
Here is the config for BRI0/0 and serial 0/0.
xxxxxxxxxxxxxxx#sh run int BRI0/0
Building configuration...
Current configuration : 652 bytes
!
interface BRI0/0
description *** to Reliance for MPLS backup ***
bandwidth 128
ip address 10.124.7.11 255.255.255.0
ip access-group Reliance_MPLS in
ip access-group Reliance_MPLS out
encapsulation ppp
dialer map ip 10.124.7.4 name Ludhiana1@xxx.com broadcast 3033525
dialer load-threshold 5 either
dialer-group 1
isdn switch-type basic-net3
isdn point-to-point-setup
no fair-queue
ppp authentication pap callin
ppp chap hostname Ludhiana1@xxx.com
ppp chap password xxx
ppp pap sent-username Ludhiana1@xxx.com password xxx
ppp multilink
crypto map ludhiana_isdn
end
xxxxxxxxxxxxxxxxxxxxx1#
cap_cw_hin_vpn_ludhiana1#sh run int Serial0/0
Building configuration...
Current configuration : 317 bytes
!
interface Serial0/0
description *** 2M MPLS ; Reliance LUDHI_NSP_CIR_98191 ; a70-024 ***
ip address 10.124.4.37 255.255.255.252
ip access-group Reliance_MPLS in
ip access-group Reliance_MPLS out
encapsulation ppp
backup interface BRI0/0
no fair-queue
no dce-terminal-timing-enable
crypto map mpls_map
end
cap_cw_hin_vpn_ludhiana1#
Hope that helps.
04-18-2006 12:15 AM
Also it is in shutdown mode, when i issue the SH isdn status command. It should show deactivated.
xxxxxxxxxxxxxx#sh isdn sta
Global ISDN Switchtype = basic-net3
ISDN BRI0/0 interface
dsl 0, interface ISDN Switchtype = basic-net3
Layer 1 Status:
SHUTDOWN
Layer 2 Status:
Layer 2 NOT Activated
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask: 0x00000000
Total Allocated ISDN CCBs = 0
xxxxxxxxxxxxxxx#
04-18-2006 12:31 AM
Hello,
first of all: could you please IMMEDIATELY change your password on the dialer! This is easily decodeable and you should never post your username/password settings.
Second: looks like ISDN layer 1 does not work. Are you sure cabling and ISDN switch type are correct?
Regards, Martin
04-18-2006 01:48 AM
Can you remove the backup interface from the serial 0/0. That is why the BRI is in shutmode. Your BRI line wudnt come up until the serial is down.
04-18-2006 10:15 AM
Or shall the Bri0/0 status be in Up Up(spoofing).
Since Layer 1 is not even up, i think verification of the connection will solve your problem.....
If u happen to have a bri0/1, try swapping itto see how it goes.
04-18-2006 09:40 PM
There is only one BRI port on the router.
I have changed the cable and also resetted the NT1 box, still the ISDN is not firing.
NT1 box led staus is :: status led: off , power: on
ISDN is firing when iam able to do a test call, then it means the line is fine..right??
How do i troubleshoot further on this?
04-18-2006 10:39 PM
Hi
As Gautam pointed out the backup interface command under the serial interface will put your isdn bri interface in shutdown mode once you issue shutdown command under the main serial interf
you can better switch off the leased line modem and check for the logs.also try to get the isdn debug outputs both q921 as well as q931..
that will def help to troubleshoot your problem..
regds
04-19-2006 12:51 AM
Hi Navneet,
Can you pls post the output of "debug dialer" as soon as primary link is made down?
Are you also enabling ip traffic using "dailer-list"?
04-18-2006 10:24 PM
HI
Can u explain why u have placed access-group when u have already placed a dailer-group i think u can go for dailer-group as its eqvivalent to access-list in terms of ISDN and i think in ISDN we have to go for dailer-group instead of access-group.so in ur case u r using access-group as well as dailer- group i think this is due this.can u check by removing u r access-group statements.
Thanks
Mahmood
04-18-2006 11:42 PM
Mahmood is wrong. Access-group and dialer-group are entirely diffrerent commands.
dialer-group is for triggering the ISDN connection(interested traffic).
access-group is filtering the traffic passing through that interface with the corresponding accesslist.
You try to troubleshoot this way
First switch-off the LL modem and try to ping the outer IP.
type sh isdn status command
and check the Layer 1 and 2 satus.
If layer 1 is active and Layer 2 is ready to accept multiple frames
create a user which is there in the other router and give same password given there.
If this is also no solving
try to do the same with another BRI port of same or different router.
04-18-2006 11:45 PM
Hi ratheeshrg
Thanks for clarifying me.
Thanks
Mahmood
04-19-2006 08:38 PM
Hi,
u should have some traffic flowing for the link to come up even if it is backup interface. try keeping an continous ping from remote end and then bring down the serial interface. configuration looks fine and bri should come up. remove the isdn point to point setup as it is useless. comes by default all the time.
04-20-2006 01:15 AM
Hi Navneet
Try configuring backup delay.Also could u send the configuration
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