Netgear FVS338 FVS338 Reference Manual - Page 178
PPP Logs, System Logs: WAN Status, Auto Rollover
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FVS338 ProSafe VPN Firewall 50 Reference Manual System Logs: WAN Status, Auto Rollover Message Explanation Recommended Action Nov 17 09:59:09 [FVS338] [wand] [LBFO] WAN1 Test Failed 1 of 3 times_ Nov 17 09:59:39 [FVS338] [wand] [LBFO] WAN1 Test Failed 2 of 3 times_ Nov 17 10:00:09 [FVS338] [wand] [LBFO] WAN1 Test Failed 3 of 3 times_ Nov 17 10:01:01 [FVS338] [wand] [LBFO] WAN1 Test Failed 4 of 3 times_ Nov 17 10:01:35 [FVS338] [wand] [LBFO] WAN1 Test Failed 5 of 3 times_ Nov 17 10:01:35 [FVS338] [wand] [LBFO] WAN1(DOWN), WAN2(UP), ACTIVE(WAN2)_ Nov 17 10:02:25 [FVS338] [wand] [LBFO] WAN1 Test Failed 6 of 3 times_ Nov 17 10:02:25 [FVS338] [wand] [LBFO] Restarting WAN1_ Nov 17 10:02:57 [FVS338] [wand] [LBFO] WAN1 Test Failed 7 of 3 times_ Nov 17 10:03:27 [FVS338] [wand] [LBFO] WAN1 Test Failed 8 of 3 times_ Nov 17 10:03:57 [FVS338] [wand] [LBFO] WAN1 Test Failed 9 of 3 times_ Nov 17 10:03:57 [FVS338] [wand] [LBFO] Restarting WAN1_ The Logs suggest that the fail-over was detected after 5 attempts instead of 3. However, the reason the messages appear as above is because of the WAN state transition logic which is part of the failover algorithm. The above logs can be interpreted as below. The primary link failure is properly detected after the 3rd attempt. Thereafter the algorithm attempts to restart WAN and checks once again to see if WAN1 is still down. This results in the 4th failure detection message. If it is then it starts secondary link and once secondary link is up, secondary link is marked as active. Meanwhile secondary link has failed once more and that results 5th failure detection message. Please note that the 5th failure detection and the message suggesting secondary link is active have the same timestamp and so they happen in the same algorithm state-machine cycle. So although it appears that the failover did not happen immediately after 3 failures, internally, the failover process is triggered after the 3rd failure and transition to secondary link is completed by the 5th failure. The primary link is also restarted every 3 failures till it is functional again. In the above log, primary link was restarted after the 6th failure i.e. 3 failures after the failover process was triggered. Check the WAN settings and WAN failure detection method configured for the primary link. PPP Logs This section describes the WAN PPP connection logs. The PPP type can be configured from the web management. B-6 System Logs and Error Messages v1.0, March 2008