From: Sharma, Mohit (mohit.sharma@hp.com)
Date: Thu Jun 17 2004 - 14:16:27 GMT-3
Hi All,
Replying to my own mail.
I really cant get this thing cleared up.
The ppp callback is not working as intended- R5 calls R4, and R4 is only
able to call R5 on channel2. as channel 1 is still busy freeing
callback.
ack1R5#sh isdn act
ISDN ACTIVE CALLS
------------------------------------------------------------------------
--------
Call Calling Called Remote Seconds Seconds Seconds
Charges
Type Number Number Name Used Left Idle
Units/Currency
------------------------------------------------------------------------
--------
Out 237340 35 24 35 0
In ---N/A--- 230897 ROUTER4 27 32 27
------------------------------------------------------------------------
-
On R4 is configured as a callback server and here is what I get on R4
with debugs-
Rack1R4#
00:30:06: BR0:1 PPP: Using dialer call direction
00:30:06: BR0:1 PPP: Treating connection as a callin
00:30:07: BR0:1 CHAP: Using alternate hostname ROUTER4
00:30:07: BR0:1 CHAP: O CHALLENGE id 7 len 28 from "ROUTER4"
00:30:07: BR0:1 CHAP: I RESPONSE id 7 len 28 from "Rack1R5"
00:30:07: BR0:1 CHAP: O SUCCESS id 7 len 4
00:30:07: BR0:1 DDR: callback to Rack1R5 already started
0:30:13: DDR: Callback timer expired
00:30:13: BR0 DDR: beginning callback to Rack1R5 230897
00:30:13: BR0 DDR: Attempting to dial 230897
Rack1R4#
00:30:15: %LINK-3-UPDOWN: Interface BRI0:2, changed state to up
Rack1R4#
00:30:15: DDR: Freeing callback to Rack1R5 230897
00:30:15: BR0:2 PPP: Using dialer call direction
00:30:15: BR0:2 PPP: Treating connection as a callout
00:30:15: BR0:2 CHAP: Using alternate hostname ROUTER4
00:30:15: BR0:2 CHAP: O CHALLENGE id 3 len 28 from "ROUTER4"
00:30:15: BR0:2 CHAP: I CHALLENGE id 3 len 28 from "Rack1R5"
00:30:15: BR0:2 CHAP: Using alternate hostname ROUTER4
00:30:15: BR0:2 CHAP: O RESPONSE id 3 len 28 from "ROUTER4"
00:30:15: BR0:2 CHAP: I SUCCESS id 3 len 4
00:30:15: BR0:2 CHAP: I RESPONSE id 3 len 28 from "Rack1R5"
00:30:15: BR0:2 CHAP: O SUCCESS id 3 len 4
00:30:15: BR0:2 DDR: dialer protocol up
------------------------------------------------------------------------
------
According to the doc cd-
"""Router(config-if)# dialer enable-timeout seconds
Configures the time to wait before initiating callback. ""
SO I tried to set dialer wait-for-carrier-time 60 on R5
And dialer enable-timeout 120 on R4. But then the call from R5 on
channel 1 lasts for 60 seconds and R4 still calls R5 on channel2.
Can somebody please suggest what timers I should use on R4 and R5 (the
client) so that R4 WAITS before giving a callback to R5.
PLEASE HELP.
Many Thanks,
Mohit.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Sharma, Mohit
Sent: Wednesday, June 16, 2004 10:08 PM
To: studygroup
Subject: ISDN timers clash
Hello All,
I have seen in the labs that whenever I configure callback (ppp or
dialer), the callback router always has a clash when calling back. The
result is that the first channel is always trying to connect and the
connection is always established on the second channel.
Anybody can give a hint on whats going on??
I think I have to play around with dialer enable timeout and some other
values??
But on the calling side or the caller??
Thanks,
Mohit.
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