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LACP between cisco 3850 and fortigate 100D

Level 1
Level 1

Hi Team,

i have one scenario in that one customer have  Two Cisco 3850 switch and this switch in stack mode

One Fortigate 100D firewall there

Customer requirement is that we user one port from switch one and second port from switch 2 and connect both port to fortigate side

After that both side configure LACP Ether channel

I configured both side active -active LACP after that its working perfect .

But when custoemer reboot firewall device one of cisco port went to supspend state after reset this port will be in Present mode

at that time connectity lost between fortigate firewall and cisco switches

please give me solution for this scenario for stable configuration LACP established but it is not stable

I will update further information in next update with configuration command


Harmesh Yadav

1 Reply 1

Thiyagu VG
Level 1
Level 1

If you still have the issue, kindly share the LACP configuration from 100D and 3850.


Thiyagu Ganesan.

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