text: **11.8.3 IP Partnership and data compression**
  
  When creating an IP partnership between two systems, you can specify whether you want to 
  use the data compression or not. When enabled, IP partnership compression compresses the 
  data that is sent from a local system to the remote system and potentially uses less 
  bandwidth than with uncompressed data. It is also used to decompress data that is received 
  by a local system from a remote system. 
  
  Data compression is supported for IPv4 or IPv6 partnerships. To enable data compression, 
  both systems in an IP partnership must be running a software level that supports IP 
  partnership compression (V7.7 or later). 
  
  To fully enable compression in an IP partnership, each system must enable compression. 
  When compression is enabled on the local system, data sent to the remote system is 
  compressed so it needs to be decompressed on the remote system, and vice versa. 
  
  Although IP compression uses the same RtC algorithm as for volumes, there is no need for a 
  RtC license on any of the local or remote system. 
  
  Replicated volumes using IP partnership compression can be compressed or uncompressed 
  on the system because there is no link between volumes compression and IP Replication 
  compression: 
  
  (cid:2) Read operation decompresses the data 
  (cid:2) Decompressed data is transferred to the Remote Copy code 
  (cid:2) Data is compressed before being sent over the IP link 
  (cid:2) Remote system remote copy code decompresses the received data 
  (cid:2) Write operation on a volume compresses the data 