Aggregate interface with VLANs

[rbrahmi]

Dear community,

I need your help,

I created an aggregate interface (Port1 and port2) with multiple VLANs for internal network, there is no ip address on aggregate interface 

when connected those ports (Port1 and port2) to a cisco switch (Interface g1/0/1 and g1/0/2) the link doesn't come up, so the fortiGate can't communicate with the internal network (Cisco switch)

On Cisco switch :

 - interface g1/0/1 :

switchport trunk native vlan 99

switchport mode trunk

end

- interface g1/0/2 :

Switchport mode trunk

end

Interface vlan 99 : 192.168.254.251/29

ip route 0.0.0.0 0.0.0.0 192.168.254.254

On fortigate (Aggregate interface) i have multiple VLANs, vlan 1, vlan 100, vlan 110, vlan99 ...etc,

- Sub-interface of VLAN 99 : 192.168.254.254/29

Any help please,

Thanks

[Toshi_Esumi · Accepted solution]

This is Fortinet/Fortigate forum. But to connect an aggregated link to Cisco switch you need to configure a port-channel on the Cisco side.

[rbrahmi]

Thanks for your reply