DDN APN Profile
Configuration Mode provides commands that support downlink data
notification (DDN) access point name (APN) support on the S-GW and
SAEGW. A Voice over LTE (VoLTE) license must be installed to access
DDN APN Profile Configuration Mode.
Exec > Global Configuration
> DDN APN Profile Configuration
configure > ddn-apn-profile ddn_apn_profile_name
the above command sequence results in the following prompt:
[local] host_name (ddn-apn-profile profile_name)#
The commands or keyword/variables
that are available are dependent on platform type, product version,
and installed license(s).
Removes the DDN configuration for the specified QCI value.
Specifies the quality of class identifier (QCI) to be configured.
Valid entries are from 1 to 254. A maximum of 4 QCI values are supported for
configuration per ddn-apn-profile.
Specifies a DDN parameter to be configured.
This is the time for which no data for UE is buffered. This timer
activates the moment a DDN failure is received. This value supersedes the one
configured at sgw-service level. When a DDN failure is received, the minimum of
the pkt-drop-timer configured for all QCIs having data is started.
If the DDN Delay timer is started and data arrives on a bearer with a
QCI for which this flag is set, then the S-GW will stop that timer and send the
ignore-ddn-timers configuration is applicable
only to the DDN delay timer. This helps to send DDN for preferential bearers
immediately on receiving new data. This is '0' by default and does not affect
any DDN timers.
This is the buffer allocated for storing data packets for each bearer
when the UE is in the idle state. This field is used to set higher buffer value
for preferential bearers. Valid entries are from 2 to 4 KB. The default is 2
Set this field to a value higher than 2KB only for QCI values
corresponding to preferential bearers (like VoLTE). If the default buffer size
of all QCI values is increased, it would decrease the system performance due to
higher memory consumption and such a configuration is NOT recommended.
Use this command to configure various DDN parameters for a specified
The following example configures the minimum buffer size as 3 KB for