Cisco Cisco Packet Data Gateway (PDG)
SaMOG Gateway Overview
How the SaMOG Gateway Works ▀
SaMOG Administration Guide, StarOS Release 18 ▄
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Figure 8. SaMOG Gateway IPv6 prefix Over PMIPv6 Using Stateful DHCPv6
Table 8. SaMOG Gateway IPv6 prefix Over PMIPv6 Using Stateful DHCPv6
Step
Description
1.
SaMOG authenticates between the UE and the AAA/Radius server via. WLC.
During Authentication, SaMOG receives the PDN-Type IPv6 value as part of the APN-Profile AVP in the Diameter EAP
Answer or Access-Accept message from the AAA/Radius server.
During Authentication, SaMOG receives the PDN-Type IPv6 value as part of the APN-Profile AVP in the Diameter EAP
Answer or Access-Accept message from the AAA/Radius server.
2.
After P-GW selection, SaMOG performs S2a procedures towards GGSN/PGW by including the PDN-Type value received
from the AAA/Radius server during authentication.
SaMOG receives the IPv6 Prefix for the subscriber's UE using S2a procedures as per APN subscription profile at P-GW.
from the AAA/Radius server during authentication.
SaMOG receives the IPv6 Prefix for the subscriber's UE using S2a procedures as per APN subscription profile at P-GW.
3.
SaMOG sends the Radius Access-Accept message towards WLC. SaMOG includes the PDN-Type (IPv6) in the Cisco-
AVPair attribute.
AVPair attribute.
4.
The UE sends the DHCPv6 Solicit message over the CAP-WAP tunnel by including the the Client Identifier (DUID),
FQDN, Option Req:(DNSRNS Req, DNSSL Req), Elapsed Time, and IA_PD Option.
FQDN, Option Req:(DNSRNS Req, DNSSL Req), Elapsed Time, and IA_PD Option.
5.
The WLC starts PMIPv6 procedures when any of the following triggers occur:
When an Access-Accept message is received from SaMOG and authentication is completed with the UE (Step 3).
When a DHCPv6 Solicit message is received from the UE (Step 4).
For IPv6 Support, the WLC sends the PMIPv6 PBU towards SaMOG by including the Home Network Prefix: "::" and Link
Local Address: "::".
Local Address: "::".