FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
kbahrudin_FTNT
Article Id 196973
Description
This article explains how to set the correct MTU for UniFi service.  UniFi is a triple-play service by Telekom Malaysia, offering Internet access, VoIP and IPTV to residential and business customers in Malaysia.

Scope
Unifi’s internet access.

Solution
Users might have an issue to connect to PPPoE if the correct MTU is not specified.

Apart from VLAN interface with VLAN-id 500 using PPPoE Dialer, this interface also requires MTU to be set to 1492.

config system interface
    edit "unifi"
        set mtu-override enable -> Enable MTU override
        set mtu 1492 -> set MTU to 1492
    next
end

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