Network: How to setup Cisco 2911 Router?

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Hello, my company is switching over from a Cisco small business router (RV325) to a Cisco 2911. Our phones were working fine on the RV325, but we are having trouble when connected to the 2911.

We called Ringcentral support and they basically told us that we need to forward ranges of ports on the 2911. However, the 2911 doesn't actually support forwarding port ranges. I noticed that the 2911 is listed as a supported router, so one would think there would be a way to get the phones to work with the router.

Has anyone else gotten their Ringcentral phones to work with a 2911 or are we just going to have to invest in some different equipment?

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Daniel Zamadics

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Posted 5 years ago

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Dave Herron, U.S. Tier 3 Support

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Hi Daniel,
This is actually going to be a little more complex than just setting up the port forwarding. You probably need to familiarize yourself with Access Lists if you aren't already. Here is one I just googled You can probably find a few more if you need. Once you are able to create access lists appropriately you can then design one specific to your network, and ensure you open up all traffic to and from our IP ranges:

If you want to further secure it you can specify the port ranges as well:




Hope this helps.


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Andy Thompson, Sales Engineer (SE)

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I would also recommend disabling any SIP inspection policy that may be present.
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Daniel Zamadics

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Thank you guys for your help, I was clearly over thinking it with the port forwarding. I applied a few simple access lists and the phones were able to register almost immediately. Lesson learned!
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Mike, Official Rep

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Thanks for the follow up Daniel! 
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Steve Grosz

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Do you have a sample of the access list you used that worked on your router?