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Event id 5120 - STATUS_CONNECTION_DISCONNECTED(c0000020c)

Osama Mansoor 86 Reputation points
2021-07-28T08:00:59.93+00:00

Hi,

Today faced below Warning on Three nodes Windows Server 2019 Hyper-V Cluster

118549-hp-server-error.jpg

System Center Virtual Machine Manager
Windows Server Clustering
Windows Server Clustering
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Clustering: The grouping of multiple servers in a way that allows them to appear to be a single unit to client computers on a network. Clustering is a means of increasing network capacity, providing live backup in case one of the servers fails, and improving data security.
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  1. Eleven Yu (Shanghai Wicresoft Co,.Ltd.) 10,756 Reputation points Microsoft Vendor
    2021-07-29T06:26:03.867+00:00

    Hi,

    Thank you for posting the issue to Q&A forum.

    The warning might occur if you have unused but active network-adapters. You can check and disable the useless Adapter to see if the warning will not reoccur.

    For your reference:
    FailoverCluster: EventID 5120 - STATUS CONNECTION DISCONNECTED(c000020c)

    You can also read below articles for reference to troubleshoot the 5120 event.
    Unable to access ClusterStorage folder on a passive node in a server cluster
    Troubleshooting Cluster Shared Volume Auto-Pauses – Event 5120

    Thanks,

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    If the Answer is helpful, please click "Accept Answer" and upvote it. Thanks.

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  2. Osama Mansoor 86 Reputation points
    2021-07-30T07:03:58.65+00:00

    Hi @Eleven Yu (Shanghai Wicresoft Co,.Ltd.)

    In a server, there are 4 Adapters and are part of two different NIC teams.One is used for LAN traffic and one is used for a heartbeat for a cluster

    As per below link not found any relevant Event id but found some others are they important?

    http://wiki.webperfect.ch/index.php?title=FailoverCluster:\_EventID_5120\_-\_STATUS_CONNECTION_DISCONNECTED(c000020c)

    119302-cluster.jpg

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  3. Osama Mansoor 1 Reputation point
    2021-08-05T04:46:56.993+00:00

    Can someone please help

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