Cisco Cisco Packet Data Gateway (PDG)
All these 4 cases will be supported with the exception that at any point of time maximum of four traffic selector
per protocol (combination of IPv4 and/or IPv6) will be supported in a single CHILD SA.
per protocol (combination of IPv4 and/or IPv6) will be supported in a single CHILD SA.
When narrowing is done, if there are several subsets are acceptable, GW will respond back with first 4
acceptable subsets and it will not support ADDITIONAL_TS_POSSIBLE notification.
acceptable subsets and it will not support ADDITIONAL_TS_POSSIBLE notification.
.
Static IP Address Allocation Support
ePDG supports the static UE IP address communicated by AAA to ePDG over SWm interface (as
Served-Party-IP-Address AVP in DEA) and ePDG communicates the same to PGW over S2b interface (as
PAA IE of create session request GTP message and Home Network Prefix/IPv4 Home Address in PBU for
PMIPv6 case).
Served-Party-IP-Address AVP in DEA) and ePDG communicates the same to PGW over S2b interface (as
PAA IE of create session request GTP message and Home Network Prefix/IPv4 Home Address in PBU for
PMIPv6 case).
This feature is applicable for both GTPv2 and PMIPv6 based implementation.
It shall be AAA server functionality to provide the static PGW IP address, when the UE IP address is provided
statically so that same PGW is selected which have the static IP pool corresponding to UE address. ePDG
will continue with call establishment and will not be validating the AAA provided PGW allocation type. It is
the discretion of PGW to accept/reject call in case the requested static IP address is not available at the PGW.
statically so that same PGW is selected which have the static IP pool corresponding to UE address. ePDG
will continue with call establishment and will not be validating the AAA provided PGW allocation type. It is
the discretion of PGW to accept/reject call in case the requested static IP address is not available at the PGW.
During handoff calls the priority should be given to UE provided IP address over the ones statically provided
by AAA server as the subscribed QoS profile at AAA may not be updated. When UE is offloaded from LTE
the IP address provided in LTE to UE should be given priority in WiFi over the AAA provided values. WiFi
to WiFi handoff is not a requirement so inter ePDG service handoff is not a valid use-case.
by AAA server as the subscribed QoS profile at AAA may not be updated. When UE is offloaded from LTE
the IP address provided in LTE to UE should be given priority in WiFi over the AAA provided values. WiFi
to WiFi handoff is not a requirement so inter ePDG service handoff is not a valid use-case.
All the three PDN Types UE static IP address are supported including the IPv4, IPv6 and IPv4v6.
Table 9: ePDG Static IP Address support failure matrix
ePDG Action
AAA provided
Static IP address
type
Static IP address
type
AAA provided
PDN type
PDN type
UE requested
PDN Type
PDN Type
S.N
Call established for v4 PDN
type using the AAA provided
static IP address.
type using the AAA provided
static IP address.
v4
v4
v4
1
Call established for v4 PDN
type but ignoring the AAA
provided IP address.
type but ignoring the AAA
provided IP address.
v6
v4
v4
2
Call established for v4 PDN
type and using v4 address
provided by AAA.
type and using v4 address
provided by AAA.
v4v6
v4
v4
3
Call established for v4 PDN
type and using v4 address
provided by AAA.
type and using v4 address
provided by AAA.
v4
v4v6
v4
4
Call established for v4 PDN
type and using v4 address
provided by AAA.
type and using v4 address
provided by AAA.
v4v6
v4v6
v4
5
ePDG Administration Guide, StarOS Release 19
36
Evolved Packet Data Gateway Overview
Static IP Address Allocation Support