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Why are the WLSEs in my redundant environment exhibiting problems such as duplicate IPs, etc., and why am I having trouble accessing them with virtual IP addresses?

April 26, 2017duplicate Environment exhibiting ip addresses iPS problems redundant

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Why are the WLSEs in my redundant environment exhibiting problems such as duplicate IPs, etc., and why am I having trouble accessing them with virtual IP addresses?

1 Answer

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10 Posted

A. If DNS is enabled, then it is possible the DNS servers specified for use by the WLSE are not operational, not reachable due to a network outage, or not configured correctly. If the DNS server is not set up correctly, proper communication between the Active and Standby WLSEs will not be maintained, and will result in the status for both WLSEs becoming Active-Lost-Standby. Check the status by using the CLI command redundancy status, or by selecting Admin > Appliance > Redundancy > Redundancy Status. On the master DNS server, make sure that the DNS zone file for the inverse zone (in-addr.arpa) for the netblock contains the necessary PTR records for each WLSE. Please note that if the time required to get a response from the DNS servers when requesting a PTR record in the inverse zone exceeds 15 seconds, then this problem may occur.