By default, supported firewalls perform tunnel
acceleration to improve performance and throughput for traffic going
through GRE tunnels, VXLAN tunnels, and GTP-U tunnels. Tunnel acceleration
provides hardware offloading to reduce the time it takes to perform
flow lookups and allows the tunnel traffic to be distributed more
efficiently based on the inner traffic.
for GTP-U tunnels is supported by default on PA-7000 Series firewalls
with PA-7000-100G-NPC-A and PA-7050-SMC-B or PA-7080-SMC-B. GTP
must be enabled for GTP-U tunnel acceleration to occur. GTP-U tunnel
acceleration is very useful for narrowband IoT (NB-IoT) traffic.
If you configure a Tunnel Content Inspection policy rule for a firewall
to inspect GTP-U packets in a tunnel, you should disable tunnel
You can disable tunnel acceleration to troubleshoot.
If you disable tunnel acceleration on the PA-7000 Series firewall,
you are disabling it for GRE, VXLAN, and GTP-U tunnels simultaneously.