Firewall with L2 Interfaces and dual uplinks to switch.

jwill2 — Thu, 20 Feb 2025 15:14:44 GMT

Question on L2 Interfaces and internal VLANs. We are connecting a 220R with all interfaces in L2. We have 2 gateway switches so this firewall with have dual uplinks (one to each GW). How do I apply a VLAN to these interfaces? Do I even need to?

One some other deployments where we've had dual uplinks (but usually to the same switch, not separate) we have had to apply a VLAN to avoid STP issues. However, this defeats the purpose of the dual uplink redundancy because the VLAN will only allow traffic to go over the interface configured with that VLAN.

I hope some of that made sense. I can apply the VLAN to one of the uplinks like we've done in the past but I was hoping to get it working correctly with the dual uplinks.

Re: Firewall with L2 Interfaces and dual uplinks to switch.

Raido_Rattameister — Thu, 20 Feb 2025 16:24:34 GMT

Does this help?

https://weberblog.net/layer-2-redundancy-with-stp-palo-alto-firewall-cisco-switches/

topic Firewall with L2 Interfaces and dual uplinks to switch. in Next-Generation Firewall Discussions

Firewall with L2 Interfaces and dual uplinks to switch.

Re: Firewall with L2 Interfaces and dual uplinks to switch.