Lync 2013 High Availablity in Pool

Hi MS recommends to have 3 FE servers in Lync 2013 Pool. I have few questions to clarify
1. why MS says if we have 2 FE servers then it will work as Lync 2010. what makes the differences between Lync 2010 (with 2 FE servers and Lync 2013 with 3 FE servers)
1. with 2 FE servers in Lync 2013 pool, what will happen if my BE server goes down?
3. I know the quorum used in Lync 2013 High availability (windows fabric) . Where the quorum will be stored? what model it is using?
Thanks

Enterprise Edition pools now are recommended to have a minimum of three, yes THREE front-end servers. This is due to the "Windows Fabric" replication architecture based on Azure. The back-end SQL database is no longer the store for real-time data.
If you BE Server down, Lync will work for 10 min. then become down
In order to function the Windows Fabric needs to achieve a status of Quorum. This means a certain number of servers (Voters) must be able to communicate with each other to ensure that the pool is capable of maintaining consistency (Quorum). There are 2
different pool states in which we must maintain\achieve quorum which differ in how many voters must be available.
Cold Pool Startup\Quorum Lost – when a pool is first starting or after quorum has been lost, that pool must have roughly 85% of its servers available to achieve quorum1.
Operating Pool – after a pool has been started we need at least 50% of the servers available to maintain quorum2.
1 This means that when defining a pool within topology builder only add the servers that will be deployed at that time, not in the future. If you put 6 servers in a pool within topology builder and only deploy 3, we will never achieve quorum because
we don’t have approximitley 85% of the servers operational. Thus, the front end services will never start.
2 If quorum is lost then all Front End services will be shutdown to protect the cluster from data loss.
To identify the Quorum voters a given servers Windows Fabric identifies check C:\ProgramData\Windows Fabric\Settings.xml. This file is updated when the Windows Fabric Host service starts up, thus any changes to pool members requires a service restart on
all Front Ends in the pool, one at a time. The To-Do list in topology builder lets you know that after publishing the topology. If this isn't completed your servers will have a skewed view of the topology which could cause issues. Depending on the number
of servers within the pool, this will dictate which voters are required.
Even # Server Pool (Figure 1) – each server will have 1 vote and the SQL instance will have 1 vote. The SQL server will act as a tiebreaker.
Odd #Server Pool (Figure 2) – each server will have 1 vote.
For more info, You can refer below link
http://jasonshave.blogspot.com/2012/11/lync-server-2013-ha-design-changes-and.html
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Mai Ali | My blog: Technical | Twitter:
Mai Ali

Similar Messages

Lync 2013 Certificates for DR Pool

Hello, I'm kind of new to Lync 2013 so I could use a little guidance.....
My question is regarding edge server certificates for my DR site. We have 2 geographic locations, one for Prod, and one for DR in an active/passive arrangement. The pools are paired for resiliency.
The prod site is up and running, everything is functioning as it should. We recently decided to deploy Lync in DR. The prod site is using sip.x.com in DNS and SRV records for access edge. Knowing that we cannot use the same DNS
name for the DR pool, I have used sip_DR.x.com. It is recommended to use the same cert for all edge servers. Does that mean I should use the same cert for both pools? If so, should I then add the SAN sip_dr.x.com to my existing UC cert from digicert, and
import it to all my edge servers in both pools, or should I have a separate cert for DR? Or, would I request a duplicate cert from digicert and generate the request from one of my edge servers in the DR pool?
Any help you can provide will be greatly appreciated.
Thank you.

The same cert requirement is for all Edge servers in an Edge pool. You can use a new certificate for the DR Edge pool.
Take a look at Jeff Schertz' blog: http://blog.schertz.name/2012/07/lync-edge-server-best-practices/
"The exact same certificate must be used on all common interfaces across the pool, regardless of whether DNS load balancing or hardware load balancing is utilized. This means that the original certificate request must provide the ability to export
the private key as the exact same certificate and private key pair must be able to be exported from one Edge server into all other Edge servers. This is required so that in the event of a failover any existing sessions can be moved to another server
in the pool and the data can still be decrypted by the same certificate that was used to encrypt the session just prior to the failover."
Please mark posts as answers/helpful if it answers your question.
Blog
Lync Validator - Used to assist in the validation and documentation of Lync Server 2013.

Topology not replicating to Lync 2013 Edge servers

Hello all,
I have installed Lync 2013 with a FE Pool (three servers HW Load Balanced), Director Pool (two servers HW Load Balanced), and an Edge Environment (2 servers, in DMZ, member of a work group, also HW load balanced). All servers are Windows 2012
server (not R2).
I am able to login remotely and have green checks across the board at
https://testconnectivity.microsoft.com. So things are looking good.
My issue is that I am unable to replicate to my Edge servers from the FE. I am not seeing errors in the event viewer, just a big red 'x' on the topology tab in the control panel for the Edge servers. Also, when trying to force replication
the Edge servers continue to show 'False'.
Here are things I have done/checked to resolve this - so I need your assistance please:
1. From the FE, I can visit
https://EdgeFQDN:4443/replicationwebservice - there are no errors, no certificate errors so things look good
2. I have verified that I the Edge servers have the domain suffix added to them. The HW Load balancer is configured as the EdgeInternal.domain.com entry and the physical edge servers are named Edge01 and Edge02 (obviously with the domain suffix added).
So this seems correct based on recommendations.
3. I have added the following reg keys to all Lync Servers in the org
HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL ->DWORD ClientAuthTrustMode Value=2 and SendTrustedIssuerList DWORD Value: 0
I am trying to avoid having to resort to this as possible resolution -
http://ucken.blogspot.com/2012/04/resetting-lync-cms-replication.html, but if this is my next step, please let me know.
May be useless info, but here it is anyway....
One thing I will mention - during my setup, I setup Kerberos Authentication for Lync 2013. I followed
http://howdouc.blogspot.com/2011/07/kerberos-web-authentication-for-lync.html and
http://technet.microsoft.com/en-us/library/gg398976.aspx to configure this.
I am unable to access the RtcReplicaRoot\xds-replica directory on the primary FE server or any other lync server for that matter. I assume this is because it is locked down to the Kerberos account that
was created. However, I am unable to run the command "Set-CsKerberosAccountPassword -FromComputer FEFQDN.Domain.com -ToComputer EdgeFQDN.Domain.com". Obviously
this fails because the Edge servers are in a workgroup and cant see the Kerberos account that was created. Would this break the replication? Just thinking outloud...
Thanks in advance for any input.
Wall

Michael, Thank you for your response. We are currently in coexistence with a Lync 2010 environment.
Our environment consists of a European domain and a North American domain, both in the same forest. The European environment has had 2010 up and running for a couple of years and we (North America) just installed 2013 Lync. The EU domain has
many domain names they support (.uk, .net, .ie, etc.) NAm only manages .com domain name space.
I tell you this because I have configured the NAm environment to support only .com (save $ for SSL UCC licensing) and to provide separate paths to our services. There is a EU site and a NAm site in the Lync topology. The issues are with the FE
servers in NAm.
Based on your response above, the NAm servers are fine with your suggestions in #2 and #3. The CMS database is still on 2010 in the EU site.
Given that the NAm domain is configured to support only .com domain namespace, I am worried that moving the CMS to NAm FE's as it would break EU's ability for federation.
Any guidance or expertise is greatly appreciated.
My ultimate goal is to have NAm employees authenticate to their Edge servers in the site and EU to authenticate to their respective Edge Servers. Also, I have read that we can only have one Edge pool responsible for Federation in the Lync org.
I assume that we will have to keep federation going through EU as they have the SSL certs for all domains configured in their environment. Just a little confused before I make any changes.
Wall

Merge Lync 2013 Edge servers in same pool

Hi guys.
- We had Lync 2013 FE STD version.
- We have added one more Lync 2013 FE STD and done front end pool pairing.
- We had single Edge Pool, soo only 1 EDGE server being in 1 POOL.
We wish to add another Edge server and put previous and this new Edge server in one pool.
This is a printscreen of our current Edge Deployment.
Because we have a federation enabled with external partners who had put in their lync configuration
to trust to our public external address of current edge server: LyncEDGESIP.domain.com, we would like to avoid sending them new address and we have decided to keep that public address and make it EDGE POOL NAME where both edge servers would be inside.
Now we are little bit confused/amused what to do next.
If use LyncEDGESIP.domain.com to be FQDN of EDGE POOL with 2 two edge servers, what would we need to do with our current edge server.
What to put for:
Access Edge Service public address on both edge servers
Web Conferencing Edge Service public address on both edge servers
A/V Edge Service public address on both edge servers.
bostjanc

Go with cutover migration if you can take downtime. Here is the high level summary for your reference;
Remove existing edge server from topology and publish the changes.
Create a new edge server pool in topology builder.
Make sure that access edge , web conference edge and AV edge name remains the same.
Publish the topology and run the setup on both edge servers. You need to configure external and internal IP addresses based on Lync topology.
Replicate the configuration change and run the deployment wizard.
Import the certificate and start the services.
Create additional DNS A records for load balancing externally.
Thanks
Saleesh
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Technet Blog

Lync 2013 Enterprise load balancing on the front end and edge pool

Hi,
I am setting up a Lync 2013 Enterprise deployment consisting of a Front End pool (x2 FE servers) and an Edge pool (x2 Edge servers). I'm seeing some conflicting advice regarding load balancing using hardware or DNS for the front end and the edge.
On the front end I have 2 internal DNS records 'lyncfepool1.contoso.local' each of which map to one of the IPs of the FE servers. I've used my details to populate the Detailed Design Planner excel spreadsheet and am told that I require a HLB to load
balance my front end pool. I'm aware of the need to load balance HTTPS traffic internally (which will be done by TMG) however other traffic to the front end (SIP, etc) can be balanced by DNS only, and not require a HLB?
Can someone clarify the front end requirement?
Also - looking now at the edge pool - this site again have two edge servers in a pool. We are using a total of six private IP addresses, two per edge service (2 x av.contoso.com, 2 x sip.contoso.com and 2 x webcon.contoso.com). These will be
NAT'ed by the external firewall and directed to the respective external (DMZ) IP addresses on the Edge servers on port 443. I know this isn't true roundrobin due to the intelligence of the Lync client when connecting (in that the Lync client will connect
to one of the public IPs and if it can't connect, it will know to connect to the other service IP), however I want to clarify this set up, particularly the need to direct the external public IP traffic at the DMZ Edge IP specified in the topology builder.
I've attached a basic diagram of the external/DMZ/Edge side which hopefully helps with this question
Persevere, Persevere, Per..

That is because you will always need HLB for a front-end server since it hosts the Lync webservices which use HTTP/HTTPS traffic.
The description on the calculation tool also describes this correctly:
Supports Standard and Enterprise pools (up to 12 nodes), with pure device-based load balancing or a combination of DNS load balancing and device-based load balancing (for
Lync web services)
You can use either Hardware or DNS loadbalancing for SIP traffic only, but you will always need a HLB for the webservices. Both are applicable for the Front-End so you have either
full HLB for both SIP and HTTP(S) traffic
DNS LB for SIP traffic and HLB for HTTP(S) traffic
Hope this is more clear :-)
Lync Server MVP | MCITP Lync Server 2010 | If you think my post is the answer to your question, please mark it as answer so future visitors can easily find it.

Unable to search GAL on Lync 2013 Front End Pool through Lync 2013 client

I'm in the beginning of a 2010 to 2013 migration and I'm currently testing co-existence functionality between pools. I've noticed that users cannot search the GAL from their Lync client after being moved to the 2013 pool.
When trying to access the internal URL https://fepool13.domain.com/abs/handler the user is prompted to login and after three failed attempts, receives "401 - Unauthorized: Access is denied due to invalid credentials. You do not have permission
to view this directory or page using the credentials that you supplied".
Searching withing a Lync 2010 or Lync 2013 client returns no results, but there are no errors as well as nothing in the event logs or tracing folder regarding not being able to search.
The 2010 pool has been in production for a few years now and when accessing its internal ABS URL https://fepool10.domain.com/abs/handler the user is granted access after a successful login.
In the IIS logs there are slightly more detailed 401 error codes, but I’m not sure what to make of them.
The rtcab database appears to have user information and all three front end servers appear to be syncing with active directory. I say the rtcab database appears to have user info because the AbUserEntry table is filled with User ID'd, GUID's and a
bunch of other stuff.
The authentication on 2013 front end servers “internal lync website/abs/handler” is set to 1. Negotiate, 2. Ntlm - which is the same as the 2010 front end servers.
Any ideas?

Hi,
Which step did you do among migration from Lync Server 2010 to Lync Server 2013?
Did you already move CMS from Lync Server 2010 to Lync Server 2013?
Please create a new Lync account on Lync Server 2013 pool and test the issue again.
Please check if User Replication has completed with the help of the link below:
http://technet.microsoft.com/en-us/library/jj204680.aspx
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support

Unable to start Lync 2013 FE service on one of the pooled server, error "The evaluation period for Microsoft Lync Server 2013 has expired"

Team,
Unable to start FE service on one of the FE server, 2 Enterprise lync 2013 pool one FE in each pool, only following error in event vrw,
Log Name: Lync Server
Source: LS Server
Date: 12/30/2013 12:10:55 PM
Event ID: 12290
Task Category: (1000)
Level: Error
Keywords: Classic
User: N/A
Computer: ACS465-BH102.me.ykgw.net
Description:
The evaluation period has expired.
The evaluation period for Microsoft Lync Server 2013 has expired. Please upgrade from the evaluation version to the fully licensed version of the product. Look at help for Setup.exe to learn how to upgrade from evaluation version to the licensed version.
Cause: The evaluation period for Microsoft Lync Server 2013 has expired.
Resolution:
Please upgrade from the evaluation version to the licensed version of the product. Look at help for Setup.exe to learn how to upgrade from evaluation version to the licensed version.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="LS Server" />
<EventID Qualifiers="50152">12290</EventID>
<Level>2</Level>
<Task>1000</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2013-12-30T09:10:55.000000000Z" />
<EventRecordID>73953</EventRecordID>
<Channel>Lync Server</Channel>
<Computer>ACS465-BH102.me.ykgw.net</Computer>
<Security />
</System>
<EventData>
</EventData>
</Event>
Log Name: System
Source: Schannel
Date: 12/30/2013 12:13:36 PM
Event ID: 36888
Task Category: None
Level: Error
Keywords:
User: SYSTEM
Computer: ACS465-BH102.me.ykgw.net
Description:
The following fatal alert was generated: 10. The internal error state is 1203.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Schannel" Guid="{1F678132-5938-4686-9FDC-C8FF68F15C85}" />
<EventID>36888</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2013-12-30T09:13:36.779033200Z" />
<EventRecordID>83985</EventRecordID>
<Correlation />
<Execution ProcessID="556" ThreadID="3668" />
<Channel>System</Channel>
<Computer>ACS465-BH102.me.ykgw.net</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="AlertDesc">10</Data>
<Data Name="ErrorState">1203</Data>
</EventData>
</Event>
Server is already on Full version, ran Reset-CsPoolRegistrarState
for fillrest as wel as serviceret
Followed below as well,
http://social.technet.microsoft.com/Forums/lync/en-US/2a7e27ce-2dea-4e37-91ea-1ed42e110198/issue-updating-from-eval-to-volume-licenses?forum=ocsplanningdeployment
Currently done failover to another pool and users can login,
however i cant get the front end service on this server.Any pointers would be appreciated.
Praveen | MCSE Messaging 2003

rit, the command is not doing the trick since its already full version,
PS C:\Users\lyncadmin> Get-CsServerVersion
Microsoft Lync Server 2013 (5.0.8308.0): Volume license key installed.
only one server in one pool, total two pools.
Lync 2013 is on Win 2008 R2, and the event in system im inclining to since i have tried all,
Log Name: System
Source: Schannel
Date: 12/30/2013 9:26:34 AM
Event ID: 36888
Task Category: None
Level: Error
Keywords:
User: SYSTEM
Computer: ACS465-BH102.me.ykgw.net
Description:
The following fatal alert was generated: 10. The internal error state is 1203.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Schannel" Guid="{1F678132-5938-4686-9FDC-C8FF68F15C85}" />
<EventID>36888</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2013-12-30T06:26:34.877077500Z" />
<EventRecordID>64911</EventRecordID>
<Correlation />
<Execution ProcessID="556" ThreadID="620" />
<Channel>System</Channel>
<Computer>ACS465-BH102.me.ykgw.net</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="AlertDesc">10</Data>
<Data Name="ErrorState">1203</Data>
</EventData>
</Event>
Praveen | MCSE Messaging 2003

Lync 2013 Edge server compatibility with Lyn 2010 Front end Pool

Hi All,
Technet article (http://technet.microsoft.com/en-us/library/jj688121.aspx) says the following:
If your legacy Lync Server 2010 Edge Server is configured to use the same FQDN for the Access Edge service, Web Conferencing Edge service, and the A/V Edge service, the procedures in this section are not supported. If the
legacy Edge services are configured to use the same FQDN, you must first migrate all your users from Lync Server 2010 to Lync Server 2013, then decommission the Lync Server 2010 Edge Server before enabling federation on the Lync Server 2013 Edge Server.
Can you tell me why it is you have to change the External Lync Web services URL during a migration to Lync 2013 from Lync 2010. What purpose does this serve?
Also can you clarify this and explain why this is required, why would you have to migrate all of your users, would a Lync 2013 Edge not talk to a Lync 2010 front-end?
Any help would be much appreciated. MANY THANKS.

Thank you very much for all your inputs.
We still have few questions:
Questions:
Can you tell me if Lync 2010 users will be able to login using mobility if we repoint the reverse proxy (TMG) web services publishing rule to the Lync 2013 server? Remember both systems Lync 2010 and 2013 are using the same web
services URL so they will both end up at the Lync 2013 server. Alternatively if not we will migrate all users to 2013, this is not a problem
In addition to this I cannot find anything that states how Exchange UM will operate when you are running from a backup pool and the exchange UM contacts are not available because they are homed on the server that is down. This
configuration is 2 x standard edition servers pool paired. How can we make sure Exchange voice mail works during a pool failover?
Call Park is not clear to me I read the following:
Lync Server 2013 provides new disaster recovery mechanisms in the form of failover and failback processes. These failover and failback processes support recovery of Call Park functionality by allowing
users who are homed in the primary pool to leverage the Call Park application of the backup pool when an outage occurs in the primary pool. Support for disaster recovery of the Call Park application is enabled as part of the configuration and deployment of
paired Front End pools.
Is this saying we need to deploy Call Park in the DR pool and use a different range of orbit numbers, or can we use the same range in the DR pool?
Further, I can see that Common Area Phones will be fine as they will log into the DR pool automatically. Response Groups need to be exported and imported to the DR pool. Incidentally these did not migrate well at all and have
caused us a big headache!
Any inputs will be greatly appreciated. Thanks again for all of your time.

How to migrate catehery and chat room from one lync 2013 PR pool to other

Looks weired question, But i am working on to moveing chat room anmd catagory from one lync 2013 PR pool to other persietenc pool in different site.
Any one has nay idea or any post talking about ??
Anil MCC 2011,ITIL V3,MCSA 2003,MCTS 2010, My Blog : http://messagingschool.wordpress.com

Hi Surya,
Do you want to show just 2 rows, one for an "Adjusted AC_41AB" and one for "AC_41ABC"?
If so, could you not just choose AC_41AB and AC_41ABC as the Dimension Members, then create a local member to be the "Adjusted AC_41AB" which is a calculation of AC_41AB minus AC_41ABC. Then you could hide the non-adjusted AC_41AB row so that it's not visible?
If I get a chance I will test it and let you know.
Regards
John.

Lync 2013 FE pool with two server limitions

Hi,
I have some query about Lync 2013 FE pool with two FE servers.
1. if I deploy two servers in the one FE pool so what happen if one fe server down ?
2. will windows fabric work?
Thanks.

I don't completely agree with this. I have built a few environments with only 2 servers in the Front End pool (despite recommending that three be deployed)
1. Anyway in the event that one FE fails, users are temporarily disconnected and then the client will re-sign them in to the second server.
2. Two servers is supported, but not recommended. See this link (it also contains how to handle two servers - scroll to bottom) http://technet.microsoft.com/en-ca/library/gg412996.aspx.
The biggest issue with only having two servers is losing quorum. If both servers are shutdown at the same time, you can run into issues starting them back up. (it is recoverable by resetting the fabric/quorum, but it's a pain)
If this helped you please click "Vote As Helpful" if it answered your question please click "Mark As Answer" | Blog
www.lynced.com.au | Twitter
@imlynced

CMS Migration - Lync 2010 to Lync 2013 & Pool Pairing

Hi all,
Question regarding CMS installation when migrating away from Lync 2010.
Here's a brief overview of topology
- Lync 2010 Pool in Data Centre 1
- Lync 2013 Pool #1 in Data Centre 1
- Lync 2013 Pool #2 in Data Centre 2
- Lync 2013 Pools are paired
Consider the following
- CMS located on SQL Backend server for Lync 2010 Pool
- CMS database installed on SQL Back end for Lync 2013 Pool #1. CMS is moved to this location
Now for correct pool pairing and failover capabilities I would assume that
- CMS database needs to also be installed on SQL back end for Lync 2013 Pool #2
Once this is done then Lync 2013 Pool #2 Front Ends should replicate back into the CMS stored on the back end SQL database for pool #2? Nothing else would need to be done? As soon as it's installed its now a backup?
If I'm reading into this correctly the following from TechNet is basically telling me to do this?
When you establish a pool pairing that includes the pool hosting the Central
Management store, a backup Central Management store database is set up in the
backup pool, and Central Management store services are installed in both pools.
At any point in time, one of the two Central Management store databases is the
active master, and the other is a standby. The content is replicated by the
Backup Service from the active master to the standby.
Thanks,
paul.

Correct, when you enable pool pairing on Pool A - if it's a CMS server - it will prompt you to create the CMS database on Pool B. If you move CMS into a pool that is already pool paired, my experience is that CMS doesn't get created on Pool B because the
creation only happens during the pool pairing setup. Thanks -Richard
Richard Brynteson, Lync MVP | http://masteringlync.com | http://lyncvalidator.com

Lync 2013 standard number of Backends required and pool paring setup?

Hi
I am in the process of putting together a lync 2013 implementation. The plan is to use lync 2013 standard as IM and Presence are the only requirement we have approx. 3000 users
we have two sites
Site A (Primary)
x 2 FE-A1 FE-A2 Lync 2013
x1 BE-A1 Lync 2013
Site B (D.R)
X 2 FE-B1 FE-B2 Lync 2013
X1 BE-B1 Lync 2013
what I want to know is
1. If Site A has two FE servers each will require there own pool if I pair FE-A1 with FE-A2 can I also pair FE-A1 with FE-B1 and the same for 2?
2. Can the servers FE-A1 and FE-A2 use the same BE server or should I be using a separate server for each?
3. In this design I was thinking of using two edge servers 1 at each site that would be published using TMG, would this be correct, this would be for IPhone mobile users to use.
thanks in advance
J

1) If site A has to FE servers, and you go with Standard edition, they would be their own pools. If you wanted HA you could put three enterprise servers together into a single pool and load balance them. If you pair FE-A1 with FE-A2, those
two pools cannot be paired with any other pool. You also can't Pair FE-A1 to FE-A2, then FE-A2 to FE-B1.
2) Your diagram looks like Lync 2013 for the back end, it would actually be SQL, and this would specifically apply if you're using Lync enterprise. If the Lync front end servers are in the same pool, they can use the same backend, if they're not they
need separate back ends.
3) Edge servers would be published with a standard firewall, if TMG is your firewall that would work. If TMG is only being used as a reverse proxy, you would use it to publish your web services on your front end servers. Either way, you'll need
to also publish the web services on your front end servers to the Internet for mobile clients to function.
Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer".
SWC Unified Communications
This forum post is based upon my personal experience and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

Lync 2013 - Number of FE servers in paired pools

Hi,
We have an Ent. Edition Lync 2013 pool with 4 FE servers, we would like to implement a second pool at a different location for disater recovery.
Does the DR pool which will be paired with production one need to have exactly the same number of FE servers or can it have less (i.e. 3) ?
Thanks for your help,
Luca

You can have 1, or 3, or whatever number, it just has to be Enterprise to match Enterprise, you can't use Standard Edition with Enterprise for example.
Per: http://technet.microsoft.com/en-us/library/jj204697.aspx
"Each pool in a pair should have the capacity to serve all users from both pools in the event of a disaster."
That's not a statement on the number of servers, just the capacity to do what you need to do if you fail. It's sort of an obvious statement that speaks to load sharing among pools. Don't max out two pools and expect to be able to fail over to
one and run at full capacity.
In a DR situation, you may not need full capacity, so the amount of resources you'll be giving it will be based upon your own internal best practices.
Edit: And finally, yes I've done exactly what you're asking, it's fine.
Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer".
SWC Unified Communications

Lync 2013 commands shell to get the report which user is connecting to which pool in coexistence with Legacy version

HI,
We have LYNC 2013 in coexistence with OCS 2007 R2 and setup is like that user can connect to any pool either sip is exist on OCS 2007 or on LYNC 2013
Do we have any command shell to get the details about which user is connecting to which pool?
lync 2013 commands to get the report which user is connecting to legacy pool in coexistence with ocs 2007
Thanks
jitender

HI Holger,
Thanks for reply!!
But the above link will not work as per scenrio.
The SIP addresses has been migrated to LYNC server. ther is no user host on OCS server. However in communicator client the manual entry is done and OCS pool name is given. OCS pool just redirect the query to LYNC pool.
And we need to idenfy the SIP user request on OCS which are redirecting by ocs pool to lync pool
In other word we can say this question like: How to collect the number of SIP users connections coming on OCS Direct server?
Thanks
jitender
As all users are migrated to Lync Server, all users will be redirected to their home pool.
You want to collect the number of SIP connections coming from OCS server that means you want to count the number of Lync client with manual configuration pointing to OCS server.
This information is stored in SIP session. There is no Lync command to get this kind of information natively.
Lisa Zheng
TechNet Community Support

Maximum number of Edge servers within a Pool for Lync 2013

I see no reference as to the maximum number of Lync Edge servers within a pool. Does it follow the same as that of the Front End, and so, no more than 12 per pool?
Also, can you have more than one edge pool within the same data center? I don't see why not, though validation is needed.
Thanks,
Christian
Christian Frank

Maximum no. Edge Servers 12,000 concurrent remote session
You can refer below link for more info. about capacity
http://technet.microsoft.com/en-us/library/gg615015.aspx
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Mai Ali

Lync 2013 High Availablity in Pool

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