Response Group Phones Delay When Lync Edge Server is Enabled

Response Group Phones Delay When Edge Server is Enabled

I had an interesting problem today.  The client had existing Lync setup and Edge server ready to go.  I’m not sure who set it up, but I was told that this was going to be an easy job.  Well, it was not that easy…..

As soon as I turned on the Edge server at one of my client’s office, receptionist complained that she started having delays when she picks up the phone.

Later, I found out that she was not the only one with this problem.  The problem was with the people who were part of the Response Group.

I found many complaints about this on the Internet, but it seems that nobody had a solution for this issue.  People are saying that this is a problem and Microsoft knows about this.  Well, I was not happy about this and I did not know how to say to the owner that the receptionist and the others would have to work with this delay, so I kept digging.

Firewall is turned off, no antivirus or antispyware program running.  I found somewhere on the Internet that I had to turn off Web Proxy Filter for the TCP 443 traffic.  When I checked it, it was not enabled.

Long search pointed me to the Edge server.  The server was setup correctly.  At some point, I was checking the routes and noticed something that could be a problem.

This company had multiple subnets, but the route in Edge server was done only for their server’s subnet.

This is the setup:

 

192.168.1.0 – Servers
192.168.2.0 – Desktops

172.16.1.0 – DMZ

The persistent route was setup:

Response Group Phones Delay When Lync Edge Server is Enabled

When I tried to ping 192.168.1.111

Response Group Phones Delay When Lync Edge Server is Enabled

When I try to ping 192.168.2.111

Response Group Phones Delay When Lync Edge Server is Enabled

Everything looks good.  After that, I decided to run tracert command

This is the tracert for 192.168.1.111

Response Group Phones Delay When Lync Edge Server is Enabled

But look what happened when I run tracert for 192.168.2.111

Response Group Phones Delay When Lync Edge Server is Enabled

As you can see, the 192.168.2.0 network is going to the DMZ interface instead of the LAN interface.

I added the route of 192.168.2.0 and tested again.

Response Group Phones Delay When Lync Edge Server is Enabled

Trace route is okay now.  After that I tested the phones and everything worked great.  There were no more delays.

The conclusion is that Lync Edge server has to have routes for all internal subnets.

Follow @ikravchenko