Multiple VLANs to Cisco Router



  • I have an XG-7100. I am attempting to add VLANs to the pfSense to allow traffic to be seen on VLANs in my Cisco 3850. The Cisco switch does all the routing internally. The pfSense is being used for firewalling and VPN connection.

    When I create a VLAN on the pfSense to talk with the VLAN on the Cisco switch I am unable to ping between the two devices. Using the pfSense switch ports 3/4.

    What is the best method to allowing multiple VLANs to communicate between the Cisco switch/router and the pfSense.


  • LAYER 8 Global Moderator

    Huh?

    If your router downstream is doing all the routing - pfsense has no need to know about these vlans... Pfsense would be connected to the downstream via a transit network.

    All that pfsense would need to know is the gateway and routes to your downstream networks.



  • @Therion87 said in Multiple VLANs to Cisco Router:

    I have an XG-7100. I am attempting to add VLANs to the pfSense to allow traffic to be seen on VLANs in my Cisco 3850. The Cisco switch does all the routing internally. The pfSense is being used for firewalling and VPN connection.

    When I create a VLAN on the pfSense to talk with the VLAN on the Cisco switch I am unable to ping between the two devices. Using the pfSense switch ports 3/4.

    What is the best method to allowing multiple VLANs to communicate between the Cisco switch/router and the pfSense.

    High-level answer:

    1. Create a transit network between the LAN interface and a routed port on your 3850
    2. Add the IP assigned to the routed port of your 3850 as a gateway on PFsense
    3. Add static routes for each network/VLAN that is routed through your 3850 with the next hop (gateway) pointed at the IP assigned to the 3850's routed port
    4. On the 3850, add a default route with the next hop pointed at the PFsense LAN interface

    Done. Now all inter-VLAN traffic is handled by the 3850 and the only traffic hitting PFsense will be internet traffic. I run this exact same setup with a 3750X.

    The last step would be adding helper addresses to each SVI to deal with DHCP.



  • Got it figured out. Was over thinking it.

    Thanks for the replies.


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