What is the error message for event ID 21502?

If everything is fine on the server side, but not on the switches, you might even get event ID 21502, but due to a different error message: Event ID: 21502 The VM Management Service was unable to establish a connection for the virtual machine. migration tools with host XXXX.

What to do if event ID 7009 was reached?

The final solution for Event ID 7009, the timeout probably reached (30,000 milliseconds), is System Restore. If the above error occurred after a recent system change on the PC, such as installing a driver, updating Windows, or several other changes to the internal system, this could be the real culprit.

Best way to resolve event ID 21212 - Silicon Valley Gazette

Table of Contents

If you have event ID 21212 on your computer, this guide might help.

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This article provides a specific solution to Hyper-V vmm service failure and event ID 14050 overflow when the dynamic port range setting is changed.

Applicable in the following cases: Windows Server 2012 R2
Original Knowledge Base Number: 2761899

Symptoms

Suppose you have a Windows Server hard drive with Hyper-V installed for the coming year. If you try to manage Hyper-V hosts using System Center Virtual Machine 2012 Manager SP1 or remotely using Hyper-V Manager, the attempt will fail. Additionally, the celebration can be recorded in a diary that looks like this:

Protocol name: Microsoft-Windows-Hyper-V-VMMS-Admin
Source: Microsoft-Windows-Hyper-V-VMMS
Date:
Event ID: 14050
Level: Error
Description: An error occurred while returning the service principal name.
XML events: … Hyper-V Replica Service

Reason

This issue can occur if the dynamic range of TCP ports is currently out of the standard range. The Hyper-V virtual service command (Vmms.exe) uses Windows service hardening and is limited to dynamic multiple port.

To determine the number of dynamic TCP ports, run the following command at a command prompt:

  C: > netsh int ipv4 show dynamicportrange TCP tcp protocol Dynamic port range ----------------------------- - ---- Loading port: 49152 Number of ports: 16384

This issue can also occur if the NTDS port is limited to a specific port on domain controllers. If this selected NTDS port is within the default ranges, you will need to add this port type by running the script in the Resolution section on each Hyper-V host.

For more information, click the article number in the Microsoft Knowledge Base:

224196 Restrict Active Directory replication activity and RPC client traffic to a specific port

Resolution

To resolve this issue, simply run the following script once on each affected Hyper-V host. This script adds a custom tolerance range that allows Vmms.exe to communicate over an additional port range of 9000 to 9999. The script can be edited.

To configure a script to increase the configurable port range, follow these steps:

Start a text editor such as Notepad.

Copy the result of the code, then paste the code into a text file:

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 'This VBScript adds a connector range from 9000 to 9999 for exceptional traffic.'Run cscript addportrange.vbs on the Hyper-V hostExplicit option"IP Protocols"const NET_FW_IP_PROTOCOL_TCP is 6const NET_FW_IP_PROTOCOL_UDP = 17'Earthconst = net_fw_action_block 0const NET_FW_ACTION_ALLOW = 1'Directionconst NET_FW_RULE_DIR_IN = 1const NET_FW_RULE_DIR_OUT = 2'Create an object FwPolicy2.Sun fwPolicy2Set fwPolicy2 to CreateObject ("HNetCfg.FwPolicy2") 'Get service constraint for local firewall policy concept.Sun Service LimitationSet ServiceRestriction is fwPolicy2.ServiceRestriction'If the service requires sending / receiving a certain type of traffic, add WSH procedures like "allow"'' Collect network rules to harden Windows servicesDim wshRulesSet wshRules ServiceRestriction = .Rules.'' Add outbound WSH rulesDim allow NewOutboundRuleSet NewOutboundRule to CreateObject ("HNetCfg.FWRule")NewOutboundRule.Name = "Allow outbound traffic from online system to TCP at 9000 9999"NewOutboundRule.ApplicationName implies "% systemDrive%  WINDOWS  system32  vmms.exe"NewOutboundRule.ServiceName = "vmms"NewOutboundRule.Protocol = NET_FW_IP_PROTOCOL_TCPNewOutboundRule.RemotePorts = "9000-9999"NewOutboundRule.Action means NET_FW_ACTION_ALLOWNewOutboundRule.Direction = NET_FW_RULE_DIR_OUTNewOutboundRule.Enabled = truewshRules.Add NewOutboundRule'К  net of linked script

Save the file as “Addportrange.vbs” (including these special quotes). That’s right, this creates a complete file with a .vbs extension. Rating icon. Changes from a notepad icon to your own script icon.
Just run the script because cscript.

Links

970923 Unable to add managed host in SCVMM 2008 and SCVMM 2012, error 2927 (0x8033809d)

929851 The default dynamic port range provided for TCP / IP has also been changed in Windows Vista in Windows Server 2008

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Best Way To Resolve Event ID 21212

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Symptoms

Reason

Resolution

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