Thursday, June 21, 2018

How to quickly and effortless migrate edge and mediation server with reuse of IP addresses and certificates

How to quickly and effortless migrate edge and mediation server with reuse of IP addresses and certificates



When migrating your edge from 2010 to 2013 what you probably want to do is to reuse your public IP addresses and your public certificate. That way there is no extra cost when renewing this.


For the migration plan a maintenance window of approximately one hour.

(you will probably do this faster than this)

Edge-server 

Scenario.
Both the 2010 and 2013 edge-servers are setup with two NIC. One towards DMZ and one towards internal network.

On the new edge server the NIC towards DMZ is DISABLED but configured with the same public IP�s as the 2010 edge server. 
It is important do disable the NIC on the 2013 edge-server before configuring the public IPs or you will have an IP conflict with the 2010 edge server.



Migration.
  • First prepare the topology by first changing the federation route to point to the new edge server.
  • Then change the associated edge pool for every Lync pool to point to the new server.
  • On every mediation pool, change the edge pool for media to point to the new edge server.


Now the topology is ready to publish but don�t publish yet.


  • On the edge 2010 server you then export the public certificate with your private key and import this on your new edge 2013 server. Assign this certificate to your external edge certificate in step 3 of the Lync deployment wizard.

  • Now disable the NIC towards DMZ on your 2010 edge server.
  • Then enable the NIC towards DMZ on your 2013 edge server.
  • Publish the prepared topology.
  • Run tests to see that external access is OK.


Mediation Server

Most PSTN SIP-Trunk providers use a SBC (session border controller) to authenticate traffic.
So if you migrate to a new mediationserver you problably want to keep your existing IP (and wlan id) towards your PSTN provider. 

So almost same procedure as above.

Scenario.

Both the 2010 and 2013 mediation server have two NICs. One towards internal network and one towards the PSTN SIP TRUNK provider.

Migration.

  • In the topology builder, change the trunk properties to point to the new medaitionserver but dont publish yet.
  • On your new 2013 mediation server DISABLE your NIC towards the PSTN provider.
  • Configure the NIC on the new 2013 mediation server with the same IP as on the 2010 mediation server.
  • Then disable the NIC towards your PSTN SIP-Trunk provider on your 2010 mediationserver.
  • Enable the the NIC towards your PSTN SIP-Trunk provider on your 2013 mediationserver.
  • Publish the prepared Topology
  • Run tests to see that inbound and outbound calls is OK

Thats is, your done!





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