The following is sample output from the “show vpn-sessiondb detail l2l” command, showing detailed information about LAN-to-LAN sessions: The command “show vpn-sessiondb detail l2l” provide details of vpn tunnel up time, Receiving and transfer Data

Jul 30, 2008 · The debug option enables connection debugging facilities. If this option is given, pppd will log the contents of all control packets sent or received in a readable form. The packets are logged through syslog with facility daemon and level debug. Select Client Experience > Advanced > General Tab, and for Client Debug specify debug, as shown in the following screen shot: Collect VPN Logs. To collect VPN logs from Windows XP, Windows Vista, Windows 7 or Windows 8, complete the following procedure: Enable DEBUG mode for VPN logs as described in the preceding procedure. Reproduce the VPN issue. set vpn l2tp remote-access client-ip-pool start 192.168.100.240 set vpn l2tp remote-access client-ip-pool stop 192.168.100.249 set vpn l2tp remote-access dns-servers server-1

set vpn l2tp remote-access dns-servers server-2
set vpn l2tp remote-access outside-address
set vpn l2tp remote-access mtu commit ; save So there we have the typical debug output of an IPSec VPN, assuming everything is configured properly on both ends, now hopefully after going this and my post from a few weeks ago going over IKE in general you’ll have a deeper understanding of what really goes on when a routers try to form an IPSec VPN. The following is sample output from the “show vpn-sessiondb detail l2l” command, showing detailed information about LAN-to-LAN sessions: The command “show vpn-sessiondb detail l2l” provide details of vpn tunnel up time, Receiving and transfer Data diagnose debug info debug output: disable console timestamp: disable console no user log message: disable sslvpn debug level: -1 (0xffffffff) CLI debug level: 3 This output verifies that SSL VPN debugging is enabled with a debug level of -1, and shows which filters are in place. Debug commands SSL VPN debug command. Use the following diagnose commands to identify SSL VPN issues. These commands enable debugging of SSL VPN with a debug level of -1 for detailed results. diagnose debug application sslvpn -1 diagnose debug enable. The CLI displays debug output similar to the following:

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Jan 18, 2011 · The best approach to troubleshooting VPN problems is to use the process of elimination. In this article, I will show you 10 things to look for when you're trying to determine the cause of VPN errors.

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Jan 18, 2011 · The best approach to troubleshooting VPN problems is to use the process of elimination. In this article, I will show you 10 things to look for when you're trying to determine the cause of VPN errors. debug crypto ca [cluster |messages |periodic-authentication |scep-proxy |transactions | trustpool ][ 1-255 ] SyntaxDescription Enablesdebuggingfor crypto ca .Use?toseetheavailablesubfeatures. While reproducing your problem, the VPN Client will capture the debug output for submission. Copy IKE Service Debug Output Files. To make a copy of the IKE Service debug output, start the VPN Trace application using Administrative privileges and perform the following steps. Click the IKE Service Tab and Stop the Service Debugging of the VPN daemon takes place according to Debug Topics and Debug Levels: A Debug Topic is a specific area, on which to perform debugging. For example, if the Debug Topic is LDAP , all traffic between the VPN daemon and the LDAP server is written to the log file. To collect a debug log, generally, you will perform whichever action is giving you trouble (i.e. try to connect to the VPN), and then follow these steps to send debug information to us: Desktop Application. Click on the icon (right-click for Windows) in the menu bar or system tray and choose "Disconnect" (if applicable)