Cisco Cisco Packet Data Gateway (PDG)

 

 

 

 

1. 

The WLC sends a “PMIPv6 Proxy Binding Update” message with lifetime = 0 with NAI and the allocated IP-Address to 
the CGW. 

2. 

The CGW responds with a “PMIPv6 Proxy Binding Ack” message and cleans up the session and the associated GRE 
tunnel.  

3. 

The CGW initiates a “Binding Cache Entry” timer based on the configured “Binding Cache Entry Timeout” (session-delay-
Timeout) value under the CGW Service Configuration Mode. 

4. 

The WLC triggers a “Radius Accounting-Request” message with the “Acct-Status-Type” as “STOP” and an appropriate 
“Terminate-Cause”. 

5. 

The CGW initiates a “GTPv2 Delete Session Request” message to remove the session resources from the P-GW. 

6. 

The P-GW responds with a “GTPv2 Delete Session Response” message and intimates the MRME. 

7. 

The MRME proxies the received “Radius Accounting-Request” message to the RADIUS accounting server. 

8. 

The MRME service initiates a “Disconnect Delay” timer, based on the configured “Disconnect Delay Timeout” value under 
the MRME Service Configuration Mode.