I thought the dialer enable-timeout is used on the callback server and determines how long the callback server will wait (after initial callback negotiation and subsequent disconnection) before dialing back the client. It seems to work pretty well on my lab.
I thought the dialer wait-for-carrier command was supposed to be used on the callback client and determines how long the router should wait for a callback. Cisco recommend setting this to twice the dialer enable-timeout on the server if I understand it correctly. But playing around with that tonight it doesn't seem to be too critical, at least not for isdn. If I set the wait-for-carrier time longer than the enable-timeout (as recommended) then when the return call is placed the client recognizes it is a return-call and says so. When I set the server to dial back after two minutes but the client to only wait for 5 seconds, then I get a message on the client about 45 seconds after the call is dropped saying that no callback was received. When the server does dialback the connection is successful but there is no obvious console output that the call is a callback. It seems to decide that the callback isn't going to happen and forgets about it, then just accepts the eventual callback as a new incoming call. This might not be strictly true because I noticed the client still includes the total time from the intial call and callback request where it shows the "current call connected" statistic from the show dialer command. I've put the two debug outputs below. DIALER ENABLE TIMEOUT = 5 SEC DIALER WAIT-FOR-CARRIER = 20 SEC Sending 1, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds: 00:45:14: BR0 DDR: rotor dialout [priority] 00:45:14: BR0 DDR: Dialing cause ip (s=1.1.1.2, d=1.1.1.1) 00:45:14: BR0 DDR: Attempting to dial 13 00:45:14: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up 00:45:14: %DIALER-6-BIND: Interface BR0:1 bound to profile Di0 00:45:14: BR0:1 DDR: Callback negotiated - Disconnecting now 00:45:14: BR0 DDR: has total 0 call(s), dial_out 0, dial_in 0 00:45:14: %DIALER-6-UNBIND: Interface BR0:1 unbound from profile Di0 00:45:14: BR0:1 DDR: disconnecting call. Success rate is 0 percent (0/1) Bronx# 00:45:14: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 13 R10_3620 00:45:15: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to up 00:45:16: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down 00:45:16: DDR: Callback client for R10_3620 13 created 00:45:16: BR0:1 DDR: disconnecting call 00:45:17: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to down 00:45:20: %DIALER-6-BIND: Interface BR0:1 bound to profile Di0 00:45:20: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up 00:45:20: BR0:1 DDR: Callback received from R10_3620 13 00:45:20: DDR: Freeing callback to R10_3620 13 00:45:20: Di0 DDR: dialer protocol up 00:45:21: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to up DIALER ENABLE TIMEOUT = 60 SEC DIALER WAIT-FOR-CARRIER = 5 SEC Sending 1, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds: 00:53:16: BR0 DDR: rotor dialout [priority] 00:53:16: BR0 DDR: Dialing cause ip (s=1.1.1.2, d=1.1.1.1) 00:53:16: BR0 DDR: Attempting to dial 13 00:53:17: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up 00:53:17: %DIALER-6-BIND: Interface BR0:1 bound to profile Di0 00:53:17: BR0:1 DDR: Callback negotiated - Disconnecting now 00:53:17: BR0 DDR: has total 0 call(s), dial_out 0, dial_in 0 00:53:17: %DIALER-6-UNBIND: Interface BR0:1 unbound from profile Di0 00:53:17: BR0:1 DDR: disconnecting call. Success rate is 0 percent (0/1) Bronx# 00:53:17: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 13 R10_3620 00:53:18: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to up 00:53:18: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down 00:53:18: DDR: Callback client for R10_3620 13 created 00:53:18: BR0:1 DDR: disconnecting call 00:53:19: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to down Bronx# Bronx# 00:54:03: DDR: No callback received from R10_3620 13 00:54:03: DDR: Freeing callback to R10_3620 13 00:54:17: %DIALER-6-BIND: Interface BR0:1 bound to profile Di0 00:54:17: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up 00:54:18: Di0 DDR: dialer protocol up 00:54:19: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to up 00:54:23: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 13 R10_3620 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65797&t=65649 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
