Cisco Cisco Packet Data Gateway (PDG)

 

The figure below shows the message flow during a P-GW initiated session disconnection. The table that follows the 
figure describes each step in the message flow. 

 

 

 

1. 

The P-GW initiates a "GTPv2 Delete Bearer Request" to remove the session resources from CGW. 

2. 

The CGW responds back with a "GTPv2 Delete Bearer Response" to P-GW.. 

3. 

The CGW sends a "PMIPv6 Binding Revocation Indication" message to WLC to detach PMIPv6 GRE Tunnel between 
WLC and CGW. 

4. 

The MRME initiates a "Diameter Session-Termination-Request" message towards 3GPP AAA Server without waiting for 
GTPv2 Response procedures. 

5. 

The MRME also initiates a "Radius Disconnect Request" Message towards WLC to release the resources on WLC and 
towards UE.