cisco 801 will not disconnect isdn

[jegrisley]

I have a cisco 801 isdn router. As a complete cisco novice i used &quot;Fast Step&quot; to set it up. My first problem is that it will not disconect from the internet. It connects fine but doesnot timeout even when all other devices on my network are turned off. i have viewed the IOS configuration on Fast step setup and it looks to my novice eyes that the idle timeout was set to 360 secs. i have followed a few articles on forums that have enabled me to get into &quot;privaleged mode&quot; via telnet and have got to a router<config-if># prompt but when I try to enable dialer timeout i get the error message &quot;%Remove Dialer Profile Config first&quot;

I am unable to get any further. Also it seems like when the ISP cuts the connection the router has to be rebooted to dial again.

Thank you in advance for any help you can give me.

 

[jimmyzz]

jegrisley,
The reason for your error message is that you have a Dialer Profile configured. You are trying to modify the idle-timeout under the main BRI interface instead of the Dialer Profile interface. If you look at your running config (do a >show run), you will see, interface BRI0 and interface Dialer<dialer number>. Apply the changes under the Dialer Profile and not the BRI interface.
Example...
Router> conf t
Router> interface Dialer1 (or whatever Dialer number)
Router> dialer idle-timeout <secs>

JimmyZ

 

[routerman]

To see what is causing the dialer to fail to time out try the `show dialer' command, should give you an IP address thats causing the dialer to keep resetting its timer.

 

[G0AOZ]

Well I have a similar problem to JEGRISLEY... I can alter the dialer idle-timeout on my 801 but it makes not a scrap of difference - the darned thing still won't drop the line! There appears to be very regular activity (every 5 seconds or so) on the Channel-1 RXD and TXD l.e.d.'s - is this likely to be what's holding the line open?

ROUTERMAN can you kindly explain what I'm looking for in all the screen output from the show dialer command.


ROGER - G0AOZ.

 

[G0AOZ]

Further to my post above... I have noticed that the GREEN TXD l.e.d. (lefthand side of the router) also flashes every 10 seconds, and this appears to generate data(?) which is TX'd on the ISDN line. (This is in addition to the 5 second regular bursts of data seen on the Channel-1 TXD and RXD orange l.e.d.'s.) This regular 10 second burst of activity happens even when the router is disconnected from both my network and console serial interface cables. I've had the telco (BT) check out and reset the line but it makes no difference.

What is generating this 10 second activity within the router? Is this what could be causing the ISDN line to stay up constantly? It's a real pain having to keep switching the router on and off all the time or pulling the ISDN plug out of the telco's data socket...

If all else fails, is there a command I can issue from the console screen (HyperTerminal) to immediately kill the line? This at least would help reduce my mounting phone bill...


ROGER - G0AOZ.

 

[routerman]

If you issue the SH DIALER command you should get output similar to this:

BRI1/0:1 - dialer type = ISDN
Idle timer (120 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is data link layer up
Dial reason: ip (s=172.16.254.110, d=172.16.254.109)
Interface bound to profile Di1
Current call connected 00:00:06
Connected to 08701234567

It shows the source IP address that triggerd the call, s=172.16.254.110 in this case.

Also note the destination address, is it one you would expect to be calling?

 

[G0AOZ]

Thanks for that info ROUTERMAN. I'll check it out next time I'm in that office...


ROGER - G0AOZ.

 

[gaveeve]

It sounds to me like you have a protocol running, perhaps CDP. You can use an access list to allow what is &quot;interesting traffic&quot;. This is traffic that will bring up the connection. If you could post the config it would be helpful.