для Cisco Cisco Packet Data Gateway (PDG)
P-GW Changes in Release 17
P-GW Enhancements for 17.0 ▀
Release Change Reference, StarOS Release 17 ▄
393
CSCum41945, CSCum17370 - EGTPC - PDN session handling for Invalid IMEI &
IMSI-less devices
Feature Changes
PDN Session Handling for Invalid IMEI and IMSI-less Devices
Due to legacy devices in the network which are configured with invalid IMEI or provide invalid IMEI to the network, it
is possible that different UEs may report the same IMEI, resulting in duplicate IMEI in the network. In other scenarios,
it is possible that IMEI is completely missing. In most scenarios, when IMSI is available and valid, the network can
handle the subscriber session. For UEs that do not have valid IMSI and attach to the network for emergency PDN, a
duplicate IMEI could be an issue because a unique index is not available for MME, S-GW, and P-GW to identify the
user.
is possible that different UEs may report the same IMEI, resulting in duplicate IMEI in the network. In other scenarios,
it is possible that IMEI is completely missing. In most scenarios, when IMSI is available and valid, the network can
handle the subscriber session. For UEs that do not have valid IMSI and attach to the network for emergency PDN, a
duplicate IMEI could be an issue because a unique index is not available for MME, S-GW, and P-GW to identify the
user.
Customer Impact: To avoid unforeseen or un-deterministic behavior, P-GW supports a common behavior in these
scenarios.
scenarios.
Performance Indicator Changes
show egtpc statistics verbose
The following fields have been added to track PDN session handling for invalid IMEI and IMSI-less devices:
IMSI/IMEI Statistics:
IMSI Invalid Length
IMSI All Zero
IMSI Not BCD
IMEI Invalid Length
IMEI All Zero
IMEI Not BCD
IMEI All Zero(unauthenticated imsi)
IMEI Not BCD(unauthenticated imsi)
IMEI All Zero(unauthenticated imsi and context replacement)
IMEI Not BCD(unauthenticated imsi and context replacement)
CSCum42664, CSCum41968, CSCum76157 - Bit Rate mapping across Gx and
GTP based interfaces
Feature Changes
Bit Rate Mapping Across Gx and GTP-based Interfaces