NETGEAR SRX5308 - ProSafe® Quad WAN Gigabit SSL VPN Firewall Reference Manual page 345

System Logs: WAN Status, Auto-Rollover (continued)
Explanation
Recommended Action Check the WAN settings and WAN failure detection method configured for the
PPP Logs
This section describes the WAN PPP connection logs. The PPP type can be configured from the
Web Management Interface (see
• PPPoE Idle Timeout Logs
Table C-12. System Logs: WAN Status, PPPoE Idle Timeout
Message
System Logs and Error Messages
ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308 Reference Manual
The logs suggest that the failover was detected after 5 attempts instead of 3.
However, the reason that the messages appear in the log is because of the WAN
state transition logic, which is part of the failover algorithm. These logs can be
interpreted as follows:
The primary link failure is correctly detected after the 3rd attempt. Thereafter, the
algorithm attempts to restart the WAN connection and checks once again to
determine if WAN1 is still down. This results in the 4th failure detection message. If
it is still down, then it starts a secondary link, and once the secondary link is up, the
secondary link is marked as active. Meanwhile, the primary link has failed once
more, and that results in the 5th failure detection message. Note that the 5th failure
detection message and the message suggesting that the 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 the 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, the primary
link was restarted after the 6th failure, that is, 3 failures after the failover process
was triggered.
primary link.
"Manually Configuring the Internet Connection" on page
Nov 29 13:12:46 [SRX5308] [pppd] Starting connection
Nov 29 13:12:49 [SRX5308] [pppd] Remote message: Success
Nov 29 13:12:49 [SRX5308] [pppd] PAP authentication succeeded
Nov 29 13:12:49 [SRX5308] [pppd] local IP address 50.0.0.62
Nov 29 13:12:49 [SRX5308] [pppd] remote IP address 50.0.0.1
Nov 29 13:12:49 [SRX5308] [pppd] primary DNS address 202.153.32.3
Nov 29 13:12:49 [SRX5308] [pppd] secondary DNS address 202.153.32.3
Nov 29 11:29:26 [SRX5308] [pppd] Terminating connection due to lack of
activity.
Nov 29 11:29:28 [SRX5308] [pppd] Connect time 8.2 minutes.
Nov 29 11:29:28 [SRX5308] [pppd] Sent 1408 bytes, received 0 bytes.
Nov 29 11:29:29 [SRX5308] [pppd] Connection terminated.
v1.0, April 2010
2-11).
C-7