Solved

Where to place Lync Mediation Server

Posted on 2014-12-31
13
439 Views
Last Modified: 2015-01-01
In Lync environment, I believe Edge Server should be in the DMZ and probably Mediation Server too (I am not sure).
inside the Network we can have Lync Server ( called Frond End).

I need to confirm whether Mediation server needs to be in DMZ

Thank you
0
Comment
Question by:jskfan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
13 Comments
 
LVL 58

Assisted Solution

by:Cliff Galiher
Cliff Galiher earned 334 total points
ID: 40526303
In most topologies, the mediation server is colocated on the FE server. The only time you'd break it out is in a SIP trunk situation where media bypass is not an option. In such cases, the SIP trunk is still a specific static eoute, so a DMZ offers no benefit but severely complicates things. It would be very unusual to put a standalone mediation server in a DMZ, in my opinion.
0
 
LVL 20

Assisted Solution

by:Satya Pathak
Satya Pathak earned 83 total points
ID: 40526430
0
 
LVL 8

Assisted Solution

by:Steven Sheeley
Steven Sheeley earned 83 total points
ID: 40526511
The mediation server in Lync 2010/2013 is, or can be, collocated on the front end server. To enable Microsoft Lync server 2010/2013 for Enterprise voice scenarios, you need to implement a Mediation server. This server role has one purpose, which is transcoding known signaling and codecs to Microsoft’s own RT Audio codec (Real time Audio). And the mediation server is a part of your domain, INSIDE the DMZ, not a part of the DMZ.
0
Comparison of Amazon Drive, Google Drive, OneDrive

What is Best for Backup: Amazon Drive, Google Drive or MS OneDrive? In this free whitepaper we look at their performance, pricing, and platform availability to help you decide which cloud drive is right for your situation. Download and read the results of our testing for free!

 

Author Comment

by:jskfan
ID: 40526563
http://jaapwesscom.files.wordpress.com/2014/11/image54.png
on the Diagram shown in the above link, it looks to me like Mediation server is in the DMZ ??
0
 

Author Comment

by:jskfan
ID: 40526568
I also want to know when they say bypass the Mediation server, does that mean they do not need to use Mediation server at all.?
0
 
LVL 58

Assisted Solution

by:Cliff Galiher
Cliff Galiher earned 334 total points
ID: 40526570
Any reason why you consider a random wordpress blog authoritative? There is plenty of bad advice on all sorts of topics on the internet.
0
 
LVL 58

Expert Comment

by:Cliff Galiher
ID: 40526571
"when they say bypass the Mediation server"
Who is "they?"  The question as you worded it is too vague to remotely answer.
0
 

Author Comment

by:jskfan
ID: 40526575
http://technet.microsoft.com/en-us/library/gg398719.aspx

Media bypass is a Lync Server capability that enables an administrator to configure call routing to flow directly between the user endpoint and the public switched telephone network (PSTN) gateway without traversing the Mediation Server
0
 
LVL 58

Assisted Solution

by:Cliff Galiher
Cliff Galiher earned 334 total points
ID: 40526584
As the name implies, media bypass *only* has the media stream bypassing the mediation server. This is done to improve call quality. The mediation server is still required for SIP traffic. This is illustrated well here:

http://technet.microsoft.com/en-us/library/gg398703.aspx
0
 

Author Comment

by:jskfan
ID: 40526993
OK Cliff...so Bypassing, will still use Mediation Server for Traffic Signaling, it will just skip the media traffic...

Thanks

Can you please just clarify the placement of the Mediation server, whether it goes in the DMZ or inside the network ?
I wonder if this diagram is correct :
http://jaapwesscom.files.wordpress.com/2014/11/image54.png
0
 

Author Comment

by:jskfan
ID: 40526998
I know the article is  from wordpress...
however if Media Server is directly connected to SIP provider, that might raise some concerns...
0
 
LVL 58

Accepted Solution

by:
Cliff Galiher earned 334 total points
ID: 40527054
As I said, in a SIP trunking scenario, the route should be so restricted that a DMZ is unnecessary. If the trunk provider is very untrusted, I'd be putting an SBC at the edge (or in the DMZ) and then have the mediation server only talk to the SBC. Either way, I see no benefit to putting a standalone mediation server in a DMZ. It is a topology I'd never use.
0
 

Author Closing Comment

by:jskfan
ID: 40527073
Thank you so much for clearing this up!
0

Featured Post

Use Case: Protecting a Hybrid Cloud Infrastructure

Microsoft Azure is rapidly becoming the norm in dynamic IT environments. This document describes the challenges that organizations face when protecting data in a hybrid cloud IT environment and presents a use case to demonstrate how Acronis Backup protects all data.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Learn to move / copy / export exchange contacts to iPhone without using any software. Also see the issues in configuration of exchange with iPhone to migrate contacts.
Find out what you should include to make the best professional email signature for your organization.
The view will learn how to download and install SIMTOOLS and FORMLIST into Excel, how to use SIMTOOLS to generate a Monte Carlo simulation of 30 sales calls, and how to calculate the conditional probability based on the results of the Monte Carlo …
The viewer will learn how to use the =DISCRINV command to create a discrete random variable, use this command to model a set of probabilities and outcomes in a Monte Carlo simulation, and learn how to find the standard deviation of a set of probabil…

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question