для Cisco Cisco Packet Data Gateway (PDG)
P-GW Changes in Release 17
▀ P-GW Enhancements for 17.3
▄ Release Change Reference, StarOS Release 17
362
CSCut38800 - PGW sends CCR-U with RESOURCES_LIMITATION for VoLTE
calls in 17.1 build.
Feature Changes
Handling of Collision of GnGp (LTE to GnGP GGSN) Handoff with Ongoing CBReq or UBReq
Transaction
Previous Behavior: When P-GW initiates CBReq for bearer creation due to RAR from PCRF, and handoff to GGSN
happens before CBRsp has come from S-GW, the transaction will not be cleaned from PGW. The call relocates back to
PGW & now if RAR is received for the same bearer creation (same Qos/ARP) then P-GW ignores RAR and do not
initiate CBReq for the bearer creation.
happens before CBRsp has come from S-GW, the transaction will not be cleaned from PGW. The call relocates back to
PGW & now if RAR is received for the same bearer creation (same Qos/ARP) then P-GW ignores RAR and do not
initiate CBReq for the bearer creation.
New Behavior: P-GW aborts all pending transactions while performing handoff to GGSN. All further RAR for the
same Qos/ARP RAR requests are handled when call move back to PGW.
same Qos/ARP RAR requests are handled when call move back to PGW.
Customer Impact: VoLTE calls will not be impacted if the GnGp handover happens when CBReq or UBReq was in
process in the LTE access.
process in the LTE access.
CSCut47957 - New CLI requirement to map disc cause code for Gx
Authentication Failure
Feature Changes
Control of GTP Cause Being Sent in Create Session Response
Previous Behavior: If during initial call setup at P-GW (Create Session Request) PCRF rejects the call with 5xxx
cause code, P-GW sends GTP cause “User Authentication Failure” in Create Session Response message.
cause code, P-GW sends GTP cause “User Authentication Failure” in Create Session Response message.
In 16.x and earlier StarOS releases, P-GW rejected the call with GTP cause “No Resources Available”. The behavior
above was implemented as an enhancement.
above was implemented as an enhancement.
New Behavior: When Create Session Request message arrives at P-GW, CCR-I is sent to PCRF and PCRF rejects calls
with 5xxx cause code in CCA-I. In this case, Create Session Response is sent with failure indicated by GTP cause code.
A new CLI command has been introduced to control which GTP cause code is sent, “No Resources Available” or “User
Authentication Failed”, in Create Session Response message for this scenario. By default, “No Resources Available” is
sent for this case; however, enabling the new command sends “User Authentication Failed” cause code in Create
Session Response.
with 5xxx cause code in CCA-I. In this case, Create Session Response is sent with failure indicated by GTP cause code.
A new CLI command has been introduced to control which GTP cause code is sent, “No Resources Available” or “User
Authentication Failed”, in Create Session Response message for this scenario. By default, “No Resources Available” is
sent for this case; however, enabling the new command sends “User Authentication Failed” cause code in Create
Session Response.
Command Changes
map-initial-setup-auth-fail-to-gtp-cause-user-auth-fail
This is a new command that maps Gx cause code (5xxx) to access side GTP cause code Auth-failure(92) in Create
Session Response message.
Session Response message.
configure
context context_name