Monday, October 22, 2012

Cisco DCNM Listening to Dynamic / Random TCP Port

Problem Scenario:
Cisco DCNM-LAN client shows the error message "Connectivity to the Server is lost" and become unusable after 3 minutes and 40 seconds upon successful login into the DCNM-LAN client.

You have hardened the DCNM server in which it only allow certain TCP ports to connect through the iptables firewall according to the TCP ports documented in the Cisco DCNM Installation and Licensing Guide, Release 5.x as below.

Root Cause:


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