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Microsoft Lync Server 2013 : Director Troubleshooting (part 3) - Synthetic Transactions,Telnet

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9/28/2014 9:25:37 PM

Lync Server Management Shell

The Lync Server 2013 Management Shell provides a number of cmdlets that can be used to test various functions of a server. A useful cmdlet for verifying the overall health of a server is Test-CSComputer server, which verifies that all services are running, that the local computer group membership is correctly populated with the necessary Lync Server Active Directory groups, and that the required Windows Firewall ports have been opened. The Test-CSComputer cmdlet must be run from the local computer and uses the following syntax:

Test-CSComputer –Report "C:\Test-CSComputer Results.xml"

After running the cmdlet, open the generated XML file to view a detailed analysis of each check.

Synthetic Transactions

A feature carried over from Lync Server 2010 are synthetic transactions that are a set of PowerShell cmdlets used to simulate actions taken by servers or users in the environment. These synthetic transactions allow an administrator to conduct realistic tests against a service. In the case of a Director, the most useful synthetic transaction is the Test-CSRegistration cmdlet, which simulates a user signing in to the specified server.

Running the Test-CSRegistration cmdlet requires providing a target server, user credential, and SIP address. A registrar port can optionally be included. The user credential parameter’s username and password must be collected by an authentication dialog and saved to a variable, as seen in this command:

$Credential = Get-Credential "COMPANYABC\tom"

After the credentials have been collected, the cmdlet can be run with the user credential variable previously saved.

Test-CSRegistration –TargetFQDN DIR1-SF.companyabc.com –UserCredential $Credential – UserSipAddress sip:[email protected] –RegistrarPort 5061 –Verbose
TargetFQDN     : DIR1-SF.companyabc.com
Result         : Success
Latency        : 00:00:10.9506726

As seen in the output, the registration test was successful.

Telnet

Telnet is a simple method of checking whether a specific TCP port is available from a client machine. From a machine that is having trouble contacting a Director, use the following steps to verify connectivity to the Registrar service:


Tip

The Telnet client is not installed by default in modern Windows operating systems. On a desktop operating system it must be installed by using the Turn Windows Features On or Off option found in Programs and Features. On a server operating system it can be installed through the Features section of Server Manager.


1. Open a command prompt.

2. Type the following command:

telnet <Director pool FQDN> 5061

If the window goes blank and only a flashing cursor is seen, the connection was successful and the port can be contacted without issue. If the connection fails, an error will be returned. Check that the services are running on the Director and that no firewalls are blocking the traffic.

Time

A key component of any service running successfully in Lync Server 2013 is the computer time. Be sure to verify that the clocks on any Lync Server 2013 servers are correctly set and have the appropriate time zones configured. If the clocks between a server and a client are off by more than five minutes, Kerberos authentication will begin to fail, which will prevent users from authenticating successfully.

Other -----------------
- Microsoft Lync Server 2013 : Administration of the Director Role (part 4) - Services Management, Client Version Filter
- Microsoft Lync Server 2013 : Administration of the Director Role (part 3) - Topology Status
- Microsoft Lync Server 2013 : Administration of the Director Role (part 2) - Ports,Firewall Rules
- Microsoft Lync Server 2013 : Administration of the Director Role (part 1) - Services
- Microsoft Lync Server 2013 : Configuring the Director (part 2) - Web Services Ports,Reverse Proxy
- Microsoft Lync Server 2013 : Configuring the Director (part 1) - SRV Records, Web Services FQDN Overrides
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