Considerations for deployments with a large number of 

BlackBerry 10

 devices

BlackBerry UEM

 enterprise connectivity traffic for 

BlackBerry 10

 devices includes email, organizer data, and browser network traffic. All of this traffic flows from the 

BlackBerry Dispatcher

 (one for each 

BlackBerry UEM

 instance), to the active 

BlackBerry Affinity Manager

 within the 

BlackBerry UEM

 domain, to the 

BlackBerry Infrastructure

, and then to the device. In the path between the 

BlackBerry Affinity Manager

 and the 

BlackBerry Infrastructure

, network conditions such as latency, packet loss, and packet reordering reduce the rate at which data can be transmitted over a single TCP connection due to the nature of the TCP/IP protocols. 

Adding SRPs allows the 

BlackBerry Affinity Manager

 to establish multiple connections to the 

BlackBerry Infrastructure

, known as SRP connections. Each connection must have an SRP ID associated with it. By having multiple connections, you can compensate for these network effects by reducing the amount of data each connection must carry between the 

BlackBerry Affinity Manager

 and the 

BlackBerry Infrastructure

. The 

BlackBerry UEM

 Configuration Tool helps estimate how many SRP connections you need for your particular domain size and network conditions. 

It is a best practice to establish the correct number of SRP connections before you install 

BlackBerry UEM

, to allow for a good distribution of 

BlackBerry 10

 devices across the SRP connections. 

BlackBerry 10

 devices are statically assigned to the least loaded SRP connection during activation. If an extra SRP connection is added later, new devices are assigned to the new SRP connection when they are activated until the new SRP connection reaches the same load as the other SRP connections.