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Problem with Dual NIC Mediation Server RRS feed

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    Originally, I had only one NIC installed on my mediation server. All telephony features were working perfectly, with a minor exception (I could not put inbound calls on hold properly, but the call was muted and could be transferred). After reading several of the posts on this site, I decided to install a second NIC and see if that resolved my problem.

    After I installed the second NIC, I could receive inbound calls, but could no longer send outbound calls. After digging into my logs, it appears as though the mediation server is trying to send voice data via the OCS facing IP and not the Gateway facing IP.

    Help! I have ever tried to install two NICs on a server before. Did I do something wrong? How can I lock OCS into only communicating with the Gateway on the Gateway IP?

    IP Gateway: 192.168.0.250
    Gateway facing IP: 192.168.0.249
    OCS facing IP: 192.168.0.7
    OCS IP: 192.168.0.6

    Windows IP Configuration

       Host Name . . . . . . . . . . . . : server03
       Primary Dns Suffix  . . . . . . . : (companyname).local
       Node Type . . . . . . . . . . . . : Hybrid
       IP Routing Enabled. . . . . . . . : No
       WINS Proxy Enabled. . . . . . . . : No
       DNS Suffix Search List. . . . . . : (companyname).local

    Ethernet adapter Local Area Connection 3:

       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Realtek RTL8169/8110 Family PCI Gigabit E
    thernet NIC (NDIS 6.0)
       Physical Address. . . . . . . . . : 00-1E-E5-D8-17-64
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
       Link-local IPv6 Address . . . . . : fe80::813b:d7f:6b7e:7ce1%11(Preferred)
       IPv4 Address. . . . . . . . . . . : 192.168.0.249(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.255.0
       Default Gateway . . . . . . . . . : 192.168.0.250
       DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                           fec0:0:0:ffff::2%1
                                           fec0:0:0:ffff::3%1
       NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter Local Area Connection 2:

       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
       Physical Address. . . . . . . . . : 00-23-54-2F-4B-C1
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
       Link-local IPv6 Address . . . . . : fe80::6ccd:463d:db2b:5d79%10(Preferred)
       IPv4 Address. . . . . . . . . . . : 192.168.0.7(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.255.0
       Default Gateway . . . . . . . . . : 192.168.0.2
       DNS Servers . . . . . . . . . . . : 192.168.0.5
                                           192.168.0.6
       NetBIOS over Tcpip. . . . . . . . : Enabled

    Thursday, June 18, 2009 4:39 PM

Answers

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    The problem is due to both NICs being connected to the same IP subnetwork.  See this blog article for more details: http://blogs.pointbridge.com/Blogs/schertz_jeff/Pages/Post.aspx?_ID=55

    You ideally should have only a single NIC on the Mediation server, otherwise use a different subnetwork on the Media Gateway side.
    Jeff Schertz, PointBridge | MVP | MCITP: Enterprise Messaging | MCTS: OCS
    Thursday, June 18, 2009 4:50 PM
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    Thank you! This solved the outbound calling problem.

    However, I still cannot put inbound calls properly on hold. Outbound calls can be placed on hold and transferred without issue. When I log the inbound call and use the snooper, there are no errors.

    In Communicator, I receive the following error:
    "Call cannot be placed on hold.  Your speaker and microphone have been muted."
    Thursday, June 18, 2009 5:34 PM
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    What Enterprise Voice configuration you have? Media Gateway or Direct SIP? What PBX? OCS or OCS R2?
    Jeff Schertz, PointBridge | MVP | MCITP: Enterprise Messaging | MCTS: OCS
    Thursday, June 18, 2009 5:40 PM
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    OCS 2007 R2 > Mediation Server > Ingate SIParator > SIP service from Bandwidth.com

    This is a greenfield OCS 2007 R2 deployment with no intention of integrating with another PBX.

    Exchange 2007 is also deployed for Unified Messaging.
    Thursday, June 18, 2009 7:49 PM
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    I'm not sure if this has been addressesd already, but... make sure you disable the DNS registration for the NIC facing your Gateway/VoIP Provider.

    Drago
    Friday, June 19, 2009 10:56 AM
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    DNS is disabled for the NIC facing my gateway. Thank you though!

    Edit: Opened a new thread for my second issue

    Friday, June 19, 2009 1:28 PM