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Connecting nsa3650 to Cisco 9300 L3 Switch

Hi everyone,

I'm no routing expert and also am new to Sonicwall. I have an NSA360 and a Cisco 9300 and am trying to get everything to play well together.

On the firewall: x20 is the WAN interface with ip x.x.x.x. x21 is the LAN interface with ip

On the switch is svi 10 with an ip of and a pc plugged into one of the ports as with the default gateway of Also svi 50 with an ip of and using an interface as an access port that is connected to x21.

I can ping from the firewall and from the switch. But I can't ping from the firewall and can't ping from the pc.

I've read about adding a route or using virtual interfaces on the firewall. I've tried both but can't get it to work. Any help is greatly appreciated.


Category: Entry Level Firewalls

Best Answer

  • Options
    MasterRoshiMasterRoshi Moderator
    Answer ✓

    Does the switch have a route to the firewall?

    Do you have a route for the network on the firewall pointing to the switch IP on a shared segment?

    You likely don't have one which means the firewall will send the reply packet out its default gateway (ISP) or the switch won't forward it to the FW.


  • Options
    AjishlalAjishlal Community Legend ✭✭✭✭✭

    Hi @pinaldps,

    Create the default static route in your CISCO 9300.

    # ip route

    Above command sets destination network to that represents all networks.

    If you cannot do the ping from your Firewall subnet to the internal VLAN, You have to create static route in your Firewall too.

    For your reference I hereby mentioned one previous commend for the same request;

  • Options
    pinaldpspinaldps Newbie ✭

    I found when I had added the route on the firewall I didn't use the correct gateway ip. Once I corrected it everything works as expected.

    Thanks for your suggestions.

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