Improving NP6 or NP7 GTP performance

FortiGate models with NP6 or NP7 processors support improving FortiOS GTP performance by enabling the following option:

config system npu

set gtp-support enable

set gtp-enhanced-mode enable

end

gtp-support enable to offload GTP sessions to NP6 or NP7 processors. This option is disabled by default.

gtp-enhanced-mode enable to improve performance of offloaded GTP sessions by configuring NP6 or NP7 processors to set up independent Receive and Transmit queues for GTP-U processes. These queues and their associated resources are initialized when gtp-enhanced-mode is enabled. So after enabling or disabling gtp-enhanced-mode, you should restart your FortiGate to initialize the changes.

If you restore a configuration file, and if that restored configuration file has a different gtp-enhanced-mode setting, you should restart your FortiGate to initialize the changes.

Some FortiGate models running FortiOS Carrier include the following option that you can use to select the CPUs that can perform GTP-U packet inspection.

config system npu

set gtp-enhanced-cpu-range {0 | 1 | 2}

end

Where:

0 all CPUs will process GTP-U packets

1 only primary CPUs will process GTP-U packets.

2 only secondary CPUs will process GTP-U packets.