Traffic latency between Fortiswitch VLAN and Internal LAN

[keaton]

Spoiler

I am having issues with latency on internal traffic from My Fortigate 100F internal lan (hardware switch) to Fortiswitch VLAN. When I put both machines on separate Fortiswitch(148F) vlans they work fine. I have an Arube 10gb switch attached to the 100F Internal lan port.

I did notice that the speed of the internal lan port is set to 1000full while the vlan interface is set to 10000full. Would this affect traffic performance?

[keaton]

FW is allowing all traffic between the networks

[rahulkaushik-22]

Hi @keaton 

you should be fine on 100F when traffic passes through 1G-10G interface, 

Regards, 
Rahul Kaushik

[HarshChavda]

Hello @keaton ,

The speed mismatch between your FortiGate 100F internal lan port set to 1000 mbps and your FortiSwitch vlan interface set to 10000 mbps can affect traffic performance causing latency issues. Can you try to match the speeds of your interfaces. You can refer this document: https://community.fortinet.com/t5/FortiGate/Technical-Note-Changing-the-speed-settings-on-an-interfa...

best regards,

Harsh