Cisco Cisco Packet Data Interworking Function (PDIF)
SGSN Changes in Release 16
SGSN Enhancements for 16.0 ▀
Release Change Reference, StarOS Release 16 ▄
499
New Behavior: With this release, it is now possible for the operator to disable the GTPv0 fallback for requests to
GGSNs of specific APNs. This function is configured under the APN profile and is applicable for GGSNs
corresponding to that APN. If GTPv1 only is enabled in the APN profile, then the SGSN does not attempt fallback to
GTPv0 (towards GGSNs corresponding to that APN) after all GTPv1 retries have been attempted. If more than one
GGSN address is returned by the DNS server during activation, then the SGSN attempts activation with the next GGSN
after exhausting all the GTPv1 retry attempts. If only one GGSN address is returned, then the SGSN rejects the
activation after exhausting all the configured GTPv1 retries.
GGSNs of specific APNs. This function is configured under the APN profile and is applicable for GGSNs
corresponding to that APN. If GTPv1 only is enabled in the APN profile, then the SGSN does not attempt fallback to
GTPv0 (towards GGSNs corresponding to that APN) after all GTPv1 retries have been attempted. If more than one
GGSN address is returned by the DNS server during activation, then the SGSN attempts activation with the next GGSN
after exhausting all the GTPv1 retry attempts. If only one GGSN address is returned, then the SGSN rejects the
activation after exhausting all the configured GTPv1 retries.
Customer Impact: This change enables the operator to prevent unnecessary signaling on the Gn/Gp interface in
networks where all the GGSNs support GTPv1. For example, if all the home GGSNs in an operator’s network support
GTPv1, then the unnecessary GTPv0 fallback can be avoided by enabling this feature for the APNs associated with
home GGSNs.
networks where all the GGSNs support GTPv1. For example, if all the home GGSNs in an operator’s network support
GTPv1, then the unnecessary GTPv0 fallback can be avoided by enabling this feature for the APNs associated with
home GGSNs.
Command Changes
gn-gtp-version
The new command
gn-gtp-version
with its
v1-only
extension, in the APN profile configuration mode, enables
the operator to prevent the SGSN from attempting GTPv0 Requests for GGSNs associated with specified APNs so that
the SGSN tries activation with the next available GGSN if the current GGSN does not respond after the GTPv1 Request
retries fail.
the SGSN tries activation with the next available GGSN if the current GGSN does not respond after the GTPv1 Request
retries fail.
configure
apn-profile profile_name
gn-gtp-version v1-only
[ remove ] gn-gtp-version v1-only
end
Notes:
remove
used with the command erases a previous
GTPv1
configuration and returns the SGSN configuration to
the default value of
Both GTPv1 and GTPv0
Performance Indicator Changes
show apn-profile
A new field has been added to the output to indicate the current configuration for use of GTPv1 only or GTPv1 and
GTPv0 for fallback.
GTPv0 for fallback.
Gn GTP Version
CSCtz83032 - NRI Based DNS Query for Inter Pool 2G requests
Feature Changes
NRI-FQDN based DNS resolution for non-local RAIs (2G subscribers)