BIG IP 1600 - Trunk configuration - More than 4 ISP Internet providers

Yes, you can create a trunked interface, and even include your firewall interfaces if you have a single switching fabric for the LAN. If you have business reasons where VLAN isolation is not sufficient, then you will have to have a link to each switching fabric. If you have 3 separate switches, you will need 3 separate trunks. Each trunk can be a single interface, and have multiple VLANs associated with it, but the general rule is one trunk to each separate switching fabric. The switch fabric needs to be able to support LACP if you are planning to use more than one link in your trunk.

Hello thank you very very much.... Please find below the topology we are chasing...

Have you ever performed this config ? DO you know where can I find a example like that ?

thanks!!!

That should be relatively straightforward.

Create a single trunk using LACP, add interfaces Eth1.1-1.3 to the trunk. Create your VLANS 100,200,300,400 on the LTM making sure to reference the appropriate tag number in the VLAN. Create your Self IP's on VLANs 100,200,300,400 Create your Floating Self IP's on VLANs 100,200,300,400 (I would suggest locking down your ISP IP's to NO access)

You may also want to create a LAN enabled crossover interface for Network Fail Over that is not one of your ISP VLANs. (Do not do port lockdown on this interface) Add a /30 IP to the crossover between the LTM for Network Fail Over and sync.

I think some people would question being outside of the firewall, I tend to be one of those people, but you are also load balancing ISPs. Just be careful not to permit access from the internet to any self IP on the LTM and you should be ok.

Also, I'm not sure what you are looking to achieve with 3 switches in the infrastructure. If you are looking for redundancy, I may recommend putting two interfaces from each router to the lan, and using some method of unifying the forwarding plane of the switches. Whether that is in the form of stacked switches, or something along the lines of Arista / Cisco Nexus / Cisco VSS or something similar. Otherwise, the third switch in the middle really does not serve much of a purpose in the configuration.

Also, I'm not sure what you are looking to achieve with 3 switches in the infrastructure. If you are looking for redundancy, I may recommend putting two interfaces from each router to the lan, and using some method of unifying the forwarding plane of the switches. Whether that is in the form of stacked switches, or something along the lines of Arista / Cisco Nexus / Cisco VSS or something similar. Otherwise, the third switch in the middle really does not serve much of a purpose in the configuration.

thank you very very much!!!

will do a LAB next week... I'll let you know the results!!

again thank you very very much!!