Behavior Change
The SMF generates the IPv6 interface ID without International Mobile Subscriber Identity (IMSI) or Extended Unique Identifier (EUI).
Previous Behavior: The SMF generated the IPv6 interface ID in EUI-64 format based on configured or default virtual-mac under DNN. The interface ID is common for all subscribers under DNN. This operation resulted in apps like Google Duo to reject connections due to security policy.
New Behavior: The SMF generates unique 64-bit interface ID which is non-EUI-64 format by using SBI VIP address and CommonId of the subscriber.
That is, IPv6 interface ID = VIP-IP (4 bytes) + CommonId (4 bytes)
By default, virtual-mac CLI command is now disabled under DNN configuration.
Call Model |
PDU Session Establishment Accept |
Create Session Response |
---|---|---|
5G |
N11-SBI-VIP+CommonID |
Not Applicable |
4G |
Not Applicable |
GTP-VIP+CommonID |
WiFi |
Not Applicable |
GTP-VIP+CommonID |
5G->4G |
Not Applicable |
Not Applicable (N26 HO - there are NAS contents during handover) |
4G->5G |
Not Applicable (N26 HO - there are NAS contents during handover) |
Not Applicable |
4G->WiFi |
Not Applicable |
GTP-VIP+CommonID (Same as 4G) |
WiFi->4G |
Not Applicable |
GTP-VIP+CommonID (Same as 4G) |
5G->WiFi |
Not Applicable |
N11-SBI-VIP+CommonID (Same as 5G) |
WiFi->5G |
GTP-VIP+CommonID (Same as WiFi) |
Not Applicable |