Cisco Cisco Packet Data Gateway (PDG)

 

▄  SaMOG Administration Guide, StarOS Release 19 

 

 

6. 

SaMOG processes the received PMIPv6 PBU and responds with a PMIPv6 PBA, by including the valid Home Network 
Prefix and Link Local Address provided by the P-GW during S2a procedures. SaMOG also includes the IPv6 DNS 
Primary/Secondary addresses in the PMIPv6 PBA message.  

7. 

The WLC responds with a DHCPv6 Advertise message over the CAP-WAP tunnel by including the IA_PD (IA_PD prefix) 
Options, FQDN, Client Identifier, Server Identifier, Domain Search List, DNS Recursive Name Server options. 

8. 

The UE sends the DHCPv6 Request message over the CAP-WAP tunnel by including the Client Identifier (DUID), Server 
Identifier (DUID), Option Req:(DNSRNS Req, DNSSL Req), Elapsed Time, FQDN, IA_PD (IA_PD Prefix) Options. 

9. 

The WLC responds with a DHCPv6 Reply message over the CAP-WAP Tunnel by including the Client Identifier (DUID), 
Server Identifier (DUID), Elapsed Time, FQDN, IA_PD (IA_PD Prefix) Options. 

10. 

SaMOG acts as an Accounting proxy between WLC and Radius Accounting Server where all Accounting messages will 
have “Framed-IPv6-Address” AVP. 

  For PMIPv6 access type, the SLAAC and stateful DHCPv6 process remains the same as the 

Radius server/DHCPv6-Inf-Req is exchanged between the UE and the WLC. 

 

The table below describes the steps in the message flow for dual-stack support over PMIPv6. 

 

 

1. 

Refer 

  and 

  for the sequence of messages between the WLC to SaMOG, 

and SaMOG to P-GW. 

2. 

SaMOG receives the PDN-Type as IPv4, IPv6, or IPv4v6 in the APN-Profile during authentication with the Radius/AAA 
Server. 

3. 

SaMOG starts S2a procedures based on the PDN-Type, towards P-GW/GGSN 

4. 

The WLC initiates PMIPv6 PBU by including the IPv4 Home Address and/or Home Network Prefix as per the received 
PDN-Type in the Cisco-AVPair from SaMOG.  

5. 

SaMOG provides the configuration parameters (DNS IPv4/IPv6 Addresses) in the PCO Mobility option of the PMIPv6 
PBA. 

6. 

UE triggers the sequence of messages using SLAAC or Stateful DHCPv6 to get the IPv6 prefix and DHCPv4 to get the 
IPv4 address.