Looks like a VPN related problem. Maybe not all the SA's are restored on the VPN, or the VPN comes back "half connected".
I'd check the VPN status beforehand. Make sure that you can send and receive packets on both sides before "blaming" Kannel. Hope it helps. Alejandro On 4/26/07, Cyrus Patel <[EMAIL PROTECTED]> wrote:
Hello, I'm having a strange issue with Kannel's recovery behaviour after the connection to the SMSC goes down. I am connected to a SMSC over a VPN connection. Unfortunately for some reason the VPN sometimes goes down and Kannel detects it and reconnects and can receive SMSs but not send them. The kannel status page shows the outgoing messages queuing up: SMS: received 130 (0 queued), sent 48 (10 queued), store size 10 The strange thing is I tried doing the test where I pulled the network cable out and reconnected it and kannel recovers fine. Kannel only seems to be stuck when the VPN goes down. Here is the sequence of events: 1. VPN goes down. Kannel detects this and tries to reconnect: 2007-04-23 18:17:00 [2791] [7] ERROR: SMPP[SMPP:********:5000/5000:****:*****]: No responses from SMSC within 300 sec. Reconnecting. 2007-04-23 18:17:00 [2791] [7] ERROR: SMPP[SMPP:********:5000/5000:****:*****]: Couldn't connect to SMS center (retrying in 10 seconds). 2. Kannel successfully reconnects and the enquire links are responded to fine: 2007-04-11 09:03:46 [9121] [7] DEBUG: SMPP PDU 0x86c40b0 dump: 2007-04-11 09:03:46 [9121] [7] DEBUG: type_name: enquire_link 2007-04-11 09:03:46 [9121] [7] DEBUG: command_id: 21 = 0x00000015 2007-04-11 09:03:46 [9121] [7] DEBUG: command_status: 0 = 0x00000000 2007-04-11 09:03:46 [9121] [7] DEBUG: sequence_number: 40108 = 0x00009cac 2007-04-11 09:03:46 [9121] [7] DEBUG: SMPP PDU dump ends. 2007-04-11 09:03:46 [9121] [7] DEBUG: SMPP[SMPP:********:5000/5000:****:*****]: Got PDU: 2007-04-11 09:03:46 [9121] [7] DEBUG: SMPP PDU 0x86c40b0 dump: 2007-04-11 09:03:46 [9121] [7] DEBUG: type_name: enquire_link_resp 2007-04-11 09:03:46 [9121] [7] DEBUG: command_id: 2147483669 = 0x80000015 2007-04-11 09:03:46 [9121] [7] DEBUG: command_status: 0 = 0x00000000 2007-04-11 09:03:46 [9121] [7] DEBUG: sequence_number: 40108 = 0x00009cac 2007-04-11 09:03:46 [9121] [7] DEBUG: SMPP PDU dump ends. 3. SMSs are successfully received but not sent. Restarting kannel solves the problem. This seems to suggest that the Tx TCP connection in kannel has become stale and doesn't reconnect. But then why do the enquire-links work? I assume the tx SMSs and the enquire-links go out on the same connection? If anyone has seen this before it would be very helpful. We're a bit worried because we have to restart kannel almost daily. Thanks, Cyrus Best Regards, Cyrus Patel Senior Software Engineer TEL: +612 9499 9848 MOB: +61 413 685 795 FAX: +612 9499 9845 [EMAIL PROTECTED] Seeker Wireless is a registered trademark of Seeker Wireless Pty. Ltd., ABN 95 106 550 805. This electronic mail includes information from Seeker Wireless Pty Ltd which may be privileged or confidential. This information is for the use of the individual(s) or entity named in the greeting above. If you are not the intended recipient please be aware that any use of this information is prohibited. If you have received this electronic mail in error, please notify the sender (above) by return email.
-- Alejandro Guerrieri Magicom http://www.magicom-bcn.net/ LinkedIn: http://www.linkedin.com/in/aguerrieri
