FortiGate–3700D normal latency fast path architecture

You can use the following command to turn off low latency mode for np6_0 and np6_1:

config system np6 edit np6_0

set low-latency-mode disable next

edit np6_1

set low-latency-mode disable end

 

You do not have to turn off low latency to both np6_0 and np6_1. If you turn off low latency to just one NP6, the other NP6 will still be mapped according to the normal con- figuration.

In addition to turning off low latency, entering these commands also changes how ports are mapped to NP6s. Port1 is now mapped to np6_0 and port 3 is not mapped to np6_1. The FortiGate-3700D has the following fastpath architecture:

l  One 40Gb QSFP interface, port1, and four SFP+ 10Gb interfaces, port25 to port28 share connections to the first

NP6 processor (np6_0).

l  One 40Gb QSFP interface, port3, and four SFP+ 10Gb interfaces, port29 to port32 share connections to the second

NP6 processor (np6_1).

l  One 40Gb QSFP interface, port2 and ten SFP+ 10Gb interfaces, port5 to port14 share connections to the third NP6 processor (np6_2).

l  One 40Gb QSFP interface, port4, and ten SFP+ 10Gb interfaces, port15 to port24 share connections to the fourth

NP6 processor (np6_3).

 

Integrated Switch Fabric

 

FortiASIC	FortiASIC	FortiASIC	FortiASIC
NP6	NP6	NP6	NP6
np6_2	np6_3	np6_0	np6_1

 

System Bus

System Bus

CP8                    CP8

CP8                    CP8

CP8                    CP8

CPU

CP8                    CP8

You can use the following get command to display the FortiGate-3700D NP6 configuration with low latency turned off for np6_0 and np6_1. The command output shows four NP6s named NP6_0, NP6_1, NP6_2, and NP6_3 and the interfaces (ports) connected to each NP6. 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

—— —- ——-          —– ———- np6_0  0    port26           10G   Yes

1    port25           10G   Yes

2    port28           10G   Yes

3    port27           10G   Yes

0-3  port1            40G   Yes

—— —- ——-          —– ———- np6_1  0    port30           10G   Yes

1    port29           10G   Yes

2    port32           10G   Yes

3    port31           10G   Yes

0-3  port3            40G   Yes

—— —- ——-          —– ———- np6_2  0    port5            10G   Yes

0    port9            10G   Yes

0    port13           10G   Yes

1    port6            10G   Yes

1    port10           10G   Yes

1    port14           10G   Yes

2    port7            10G   Yes

2    port11           10G   Yes

3    port8            10G   Yes

3    port12           10G   Yes

0-3  port2            40G   Yes

—— —- ——-          —– ———- np6_3  0    port15           10G   Yes

0    port19           10G   Yes

0    port23           10G   Yes

1    port16           10G   Yes

1    port20           10G   Yes

1    port24           10G   Yes

2    port17           10G   Yes

2    port21           10G   Yes

3    port18           10G   Yes

3    port22           10G   Yes

0-3  port4            40G   Yes

—— —- ——-          —– ———-