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Technical Tip : The network interface of LAG member(s) status show down after upgraded to 6.2.x or 6.4.x.

Description

This article talks about the issue that arises after upgrading to 6.2.x or 6.4.x. where the status of LAG member(s) is down.

Scope

FortiGate

Solution

An example of port1 is considered to be a LAG member and it's currently showing down and to bring it up use the following CLI commands :

# config system interface
      edit port1
         set status up
      next
   end

In FortiOS 6.4.0, the status of the LAG members interfaces must set to 'UP' to be able to process traffic. Refer to below references:

Bug ID #574110 - When adding admin down interface as a member of aggregate interface, it shows up and process the traffic.

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