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bbao
bbao, System Administrator
Category: Networking
Satisfied Customers: 189
Experience:  Certified Information Systems Security Professional / Certified Information Security Manager / Microsoft Most Valuable Professional
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Have existing verizon cable modem in place and computers

Customer Question

Have existing verizon cable modem in place and computers networked behind it working just fine. Adding a Cisco RV320 in between Verizon Mode and Computer Network.
JA: Just to clarify, what's the make and model of your machine, and what operating system are you running?
Customer: Can't route traffic through the Cisco just yet. Existing Verizon Modem still working fine as I have one test computer plugged into it.
JA: What happened right before this popped up?
Customer: Unsure
JA: What troubleshooting have you tried?
Customer: Existing network 192.168.1.1
JA: Anything else you want the network expert to know before I connect you?
Customer: No
Submitted: 1 month ago.
Category: Networking
Customer: replied 1 month ago.
Just to Clarify, Verizon Actiontec MI424WR cable modem connected to internet just fine. Computers behind that grab a DHCP address from it and can surf the internet just fine. Adding a Cisco RV320 to act as the router / firewall.
Expert:  bbao replied 1 month ago.

Hello, this is Bing, a senior network engineer for 20+ years, and I am happy to help you today.

I would like to first clarify how network topology is to be changed. Do you mean form:

this existing structure

Internet <-> Verizon Cable Modem <-> Computers

to something like this?

Internet <-> Verizon Cable Modem <-> Cisco RV320 <-> Computers

Customer: replied 1 month ago.
Need to bridge the existing Verizon Cable Modem to the Cisco Router.
Customer: replied 1 month ago.
Correct
Expert:  bbao replied 1 month ago.

Yes, that's just something I am going to ask. :)

Customer: replied 1 month ago.
I am most of the way there, but am missing a static route or my IP scheme is incorrect.
Expert:  bbao replied 1 month ago.

> Can't route traffic through the Cisco just yet. Existing Verizon Modem still working fine as I have one test

If the modem is not bridge mode, it should work as well, but this way your Cisco device won't get an public IP address and the whole network performance might be theoratically a bit slow as one more subnet and one more routing step between the Verizon and Cisco devices.

Customer: replied 1 month ago.
Think I got it.
Expert:  bbao replied 1 month ago.

Please let me know your particular routing issue mentioned above.

Expert:  bbao replied 1 month ago.

What's your new finding?

Customer: replied 1 month ago.
I thought I found the bridge mode section. Hold. Checking for Bridge Mode section
Expert:  bbao replied 1 month ago.

Done?

Expert:  bbao replied 1 month ago.

I guess I know what is confusing you. The modem's bridge mode support multiple interfaces (rather than common one LAN port for most modems), you need to check Ethernet port for your scenario. STP is not necessary to be enabled. See below the screenshot for your reference.

Expert:  bbao replied 1 month ago.

Any update please?

Expert:  bbao replied 1 month ago.

Issue fixed? Please update. Thanks.

Expert:  bbao replied 30 days ago.
Any feedback please?