Cisco Cisco Packet Data Interworking Function (PDIF)
GTPP Server Group Configuration Mode Commands
▀ gtpp max-pdu-size
▄ Command Line Interface Reference, StarOS Release 17
6090
gtpp max-pdu-size
Configures the maximum payload size of a single GTPP packet that could be sent by the system.
Product
GGSN
P-GW
SAEGW
SGSN
S-GW
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration > Context Configuration > GTPP Server Group Configuration
configure > context context_name > gtpp group group_name
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-gtpp-group)#
Syntax
gtpp max-pdu-size pdu_size
default gtpp max-pdu-size
default
Resets the default
max-pdu-size
of 65400.
pdu_size
Specifies the maximum payload size (in bytes) of the GTPP packet as an integer from 1024 to 65400. The
payload includes the CDR and the GTPP header. Default: 65400
payload includes the CDR and the GTPP header. Default: 65400
Usage
The GTPP packet contains headers (layer 2, IP, UDP, and GTPP) followed by the CDR. Each CDR contains
one or more volume containers. If a packet containing one CDR exceeds the configured maximum payload
size, the system creates and send the packet containing the one CDR regardless.
The larger the packet data unit (PDU) size allowed, the more volume containers that can be fit into the CDR.
The system performs standard IP fragmentation for packets that exceed the system’s maximum transmission
unit (MTU).
one or more volume containers. If a packet containing one CDR exceeds the configured maximum payload
size, the system creates and send the packet containing the one CDR regardless.
The larger the packet data unit (PDU) size allowed, the more volume containers that can be fit into the CDR.
The system performs standard IP fragmentation for packets that exceed the system’s maximum transmission
unit (MTU).
Important:
The maximum size of an IPv4 PDU (including the IPv4 and subsequent headers) is 65,535. However,
a slightly smaller limit is imposed by this command because the system’s max-pdu-size doesn't include the IPv4 and
UDP headers, and because the system may need to encapsulate GTPP packets in a different/larger IP packet (for sending
to a backup device).
UDP headers, and because the system may need to encapsulate GTPP packets in a different/larger IP packet (for sending
to a backup device).