Cisco Cisco Packet Data Gateway (PDG)
Evolved Packet Data Gateway Overview
▀ Features and Functionality
▄ ePDG Administration Guide, StarOS Release 18
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DSCP marking is supported in different platforms like ASR5000, ASR5500 and VPC-Si/Di.
ePDG Fast Re-Auth Support
The UEs accessing through ePDG can perform multiple reattach due to movement across/within WLAN Network and
can also access multiple PDN at the same time. In these cases, the UE authentication is performed frequently with
AAA-server involving HSS node interaction for EAP-AKA algorithm.
can also access multiple PDN at the same time. In these cases, the UE authentication is performed frequently with
AAA-server involving HSS node interaction for EAP-AKA algorithm.
The operator providing the untrusted WLAN access solution through ePDG can enable fast-reauthentication in AAA-
server and UE in order to perform faster authentication and reduce the load in HSS. This is because the fast-
reauthentication uses the keys derived in the previous full-authentication. Also fast-reauthentication helps the operator
to enable local-policy in UE node to authenticate itself to AAA server periodically for enhanced security.
server and UE in order to perform faster authentication and reduce the load in HSS. This is because the fast-
reauthentication uses the keys derived in the previous full-authentication. Also fast-reauthentication helps the operator
to enable local-policy in UE node to authenticate itself to AAA server periodically for enhanced security.
Reattach with fast-reauth-id Call flow
Below call flow describes Reattach with fast-reauth-id.