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This alarm is to notify you that the heartbeat from the Local Manager the Control Center has failed due to a connection time out.

Steps to Resolve

The steps to clear the alarm involve determining the point of failure between the Local Manager and the Control Center.

Is the network down?

Ping the Control Center IP address to ensure the Local Manager can route to it:

[admin@Test5000]# ping
PING ( 56(84) bytes of data.
64 bytes from icmp_seq=1 ttl=62 time=0.364 ms
64 bytes from icmp_seq=2 ttl=62 time=0.371 ms
64 bytes from icmp_seq=3 ttl=62 time=0.399 ms
64 bytes from icmp_seq=4 ttl=62 time=0.391 ms

--- ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 2998ms
rtt min/avg/max/mdev = 0.364/0.381/0.399/0.019 ms

If you are unable to reach the Control Center, it's a good indication that the heartbeat failed due to internal network connectivity issues.

Is a firewall blocking port 8443?

Heartbeating occurs over port 8443. If you have a firewall on your network, verify that it's allowing transmission of data on port 8443.

Are the management configuration settings correct?

Often the error occurs due to incorrect configuration settings. Please see Control Center Management and verify that the management configurations settings are correct.

If you are using a DNS server, this alarm can also mean that the DNS server can't be reached. Run the config system ip command and verify that the DNS settings are configured correctly.

If these steps do not resolve the issue, please contact Lantronix Support for further troubleshooting steps.