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Gateways Down for Lync 2010

Posted on 2013-01-02
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Last Modified: 2013-01-17
I am gettign the following errors on my Lync Server 2010 for ALL outbound calls.  All inbound calls are working.  I am not sure how to fix it.  My SBC's are up and running just fine.  I tried to install CU4 but it is already installed.  Not sure how to get them back online or at least the communication between them and my Mediation server.  This is an On-Premise environment

Error 1:
A PBX gateway has been marked as down.

Gateway name: SBC01.domain.com.
Cause: A gateway failed to respond to a request within allotted time or was unable to route the request due to some error.
Resolution:
Verify that the gateway is up and can respond to calls.

Error 2:
A call to a PSTN number failed due to non availability of gateways.

Called Number: DIaled Number Here
Phone Usage: Local, Long Distance and International
Route: G12
CallId: 3b78f52fd8a94866b5726829afc6d29c

Cause: All gateways available for this call are marked as down.
Resolution:
Verify that these gateways are up and can respond to calls.

Error 3:
All Gateways are marked as Down Or Unavailable.

Cause: All Gateways are unresponsive and consequently unable to route calls to Gateways.
Resolution:
Verify that Gateways are functioning and resolve any networking issues.
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Question by:APWIP-Admin
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Accepted Solution

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irweazelwallis earned 500 total points
ID: 38738281
what are the gateways, how are they configured
Lync uses two methods to connect and verify connectivity to them firstly a ping and then a TLS connection

can you ping them, can you verify that the PSTN on the other side is working?

are there any other errors on the mediation/front end servers?
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Expert Comment

by:irweazelwallis
ID: 38738284
how do the gateways connect to the Lync servers

are you using basic SIP or TLS ? therte could be DNS or certificate issues
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Author Comment

by:APWIP-Admin
ID: 38738297
Yes I can ping them.  They are also setup for TLS which I believe is working.  All of this was working before the holidays then just before the holiday I configured my system for an iPhone and iPad using the following link.

http://social.technet.microsoft.com/wiki/contents/articles/10386.configuring-lync-server-2010-mobility-service-en-us.aspx

I believe something in this link broke it.  I can connect up just fine from my iPad and iPhone.  The othe rproblem I noticed is that I cannot connect up with my Outlook when outside the office unless I VPN in.  I was also able to do that before the mobility part.
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Expert Comment

by:irweazelwallis
ID: 38738350
Ok so start with the basics
Check all dns and rdns records for lync are pointing to the  right place as the arrive is telling you to make some changes to certain records.
Check the certificates all have the right names installed

Run the lync boa to do some basic checks

Logging will be next next step make sure the resource pack is in stalled and start with the logging.i can take a guess at which logs might show something when I am in the office tomorrow

Is there any logging on the gateways you can check. The gateways we use have good logging and showed issues with tls and other connection problems
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Author Comment

by:APWIP-Admin
ID: 38740350
Okay I am working with Microsoft on the outbound calling issue as I had a previous ticket opened with them on this.

I would like to focus on my other issue to see if anyone can help.  The problem here is that I just setup the mobility function of Lync to work with my iPhone and iPad.  That all works just fine.  The problem is that now I cannot connect to the Lync client from my laptop on the outside.  I have to VPN in to connect.  With that being said I feel it is a DNS issue.  Could anyone assist with this issue or should I open a different ticket.
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Author Comment

by:APWIP-Admin
ID: 38740439
Here is my External DNS info if it helps:

Server Info:
Lync01 = Front End Server
Lync03 = Edge Server

DNS Info:
Lync03.domain.com - A Record (Points to it's public IP ending in 170)

sip.domain.com - A Record (Points to the public IP of Lync03 Ending in 170)

sdlync.domain.com (Enterprise Pool Name) - A Record (Points to the Public IP of FE Server                                      Ending in 168)

lyncdiscover.domain.com - CNAME Record (Points to sdlync.domain.com)


This DNS configuration works just fine for iPhones and iPads as they use the lyncdiscover.domain.com to connect to the web services on the FE Server.  The problem is that now the laptops with the Lync Client aren't finding the Edge Server I believe.
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Expert Comment

by:irweazelwallis
ID: 38740595
if you have both public and internal DNS records that would confuse the client

does your VPN lock down traffic so that it only goes down the VPN tunnel?

when you connect can you ping the the required internal DNS records
i.e. internal pool dns name, sip record
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Author Comment

by:APWIP-Admin
ID: 38740713
Internally sip.domain.com and sdlync.domain.com are pointing to the same server.  Externally they are not.  Is that where the problem may be.  Internally it works but externally it does not.
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LVL 18

Expert Comment

by:irweazelwallis
ID: 38743072
yes i would take a guess that its getting confused by trying to get to the edge server from the VPN which it probably can't.
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Author Closing Comment

by:APWIP-Admin
ID: 38787981
It turns out for some reason the gateways had the same port for TLS and TCP.  IT took a while to figure out as it was not obvious since they were setup and working properly before.  Somehow they changed.

Thanks for your help and sorry for taking so long to close this issue.
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