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> Chapter 13 - Hardware Acceleration > FortiGate NP6 architectures > FortiController-5902D fast path architecture

FortiController-5902D fast path architecture

The FortiController-5902D NP6 network processors and integrated switch fabric (ISF) provide hardware acceleration by offloading load balancing from the primary FortiController-5902D CPU. Network processors are especially useful for accelerating load balancing of TCP and UDP sessions.

The first packet of every new session is received by the primary FortiController-5902D and the primary FortiController-5902D uses its load balancing schedule to select the worker that will process the new session. This information is passed back to an NP6 network processor and all subsequent packets of the same sessions are offloaded to an NP6 network processor which sends the packet directly to a subordinate unit. Load balancing is effectively offloaded from the primary unit to the NP6 network processors resulting in a faster and more stable active-active cluster.

Traffic accepted by the FortiController-5902D F1 to F4 interfaces is that is processed by the primary FortiController-5902D is also be offloaded to the NP6 processors.

Individual FortiController-5902D interfaces are not mapped to NP6 processors. Instead an Aggregator connects the all fabric interfaces to the ISF and no special mapping is required for fastpath offloading.

 

 

NP6 content clustering mode interface mapping

FortiController-5902Ds run in content clustering mode and load balance sessions to FortiGate-5001D workers. Use the following command to enable content clustering:

config system elbc

set mode content-cluster

set inter-chassis-support enable

end

You can use the following get command to display the content clustering FortiController-5902D NP6 configuration. The output shows that all ports are mapped to all NP6 processors. You can also use the diagnose npu np6 port-list command to display this information.

get hardware npu np6 port-list
Chip   XAUI Ports          Max     Cross-chip
                           Speed   offloading
------ ---- ----------     ------  ----------
all    0-3  f1             40000M  Yes
all    0-3  f2             40000M  Yes
all    0-3  f3             40000M  Yes
all    0-3  f4             40000M  Yes
all    0-3  np6_0_4        10000M  Yes
all    0-3  np6_0_5        10000M  Yes
all    0-3  elbc-ctrl/1-2  40000M  Yes
all    0-3  elbc-ctrl/3    40000M  Yes
all    0-3  elbc-ctrl/4    40000M  Yes
all    0-3  elbc-ctrl/5    40000M  Yes
all    0-3  elbc-ctrl/6    40000M  Yes
all    0-3  elbc-ctrl/7    40000M  Yes
all    0-3  elbc-ctrl/8    40000M  Yes
all    0-3  elbc-ctrl/9    40000M  Yes
all    0-3  elbc-ctrl/10   40000M  Yes
all    0-3  elbc-ctrl/11   40000M  Yes
all    0-3  elbc-ctrl/12   40000M  Yes
all    0-3  elbc-ctrl/13   40000M  Yes
all    0-3  elbc-ctrl/14   40000M  Yes
------ ---- ----------     ------  ----------

NP6 default interface mapping

You can use the following command to display the default FortiController-5902D NP6 configuration.

diagnose npu np6 port-list
Chip   XAUI Ports       Max     Cross-chip
                        Speed   offloading
------ ---- ----------  ------  ----------
all    0-3  f1          40000M  Yes
all    0-3  f2          40000M  Yes
all    0-3  f3          40000M  Yes
all    0-3  f4          40000M  Yes
all    0-3  np6_0_4     10000M  Yes
all    0-3  np6_0_5     10000M  Yes
all    0-3  fabric1/2   40000M  Yes
all    0-3  fabric3     40000M  Yes
all    0-3  fabric4     40000M  Yes
all    0-3  fabric5     40000M  Yes
all    0-3  fabric6     40000M  Yes
all    0-3  fabric7     40000M  Yes
all    0-3  fabric8     40000M  Yes
all    0-3  fabric9     40000M  Yes
all    0-3  fabric10    40000M  Yes
all    0-3  fabric11    40000M  Yes
all    0-3  fabric12    40000M  Yes
all    0-3  fabric13    40000M  Yes
all    0-3  fabric14    40000M  Yes