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Will a new modem require reconfiguration of WAP's?

New Contributor III
I have a Lennar smart home that came with three Ruckus ZoneFlex R510 WAP's and a Brocade ICX 7150-C12P switch. Amazon, whom Lennar contracted with to final install/setup all of this provides absolutely no support beyond the initial 90 days after install; i am about 26 months post-install. 

I know just enough about this stuff to screw it all up.  I have an old (~8 years) Cisco cable modem and a fairly new Linksys router.  I have been having issues with extremely slow broadband and my cable company (Cox) is telling me that my modem is going bad and I need to replace it.  Their option for modem will not fit in a smart panel, so I am looking at an Arris SURFoard SBG8300 modem/router combo. 

I know that the slow speeds are probably attributed mostly to the Covid-19 BS and everyone is home using their service, slowing it down for everyone.  Having said that, it probably wouldn't be bad to upgrade my modem anyway. 

Would I just be able to connect everything, use the same SSID and passwords and have everything work?  Is my ignorance making you guys laugh?  Haha.  Any input would be appreciated.

Wow. 2mbps seems really bad. Indeed it seems they are just trying to get you off their back. But if current speeds are ok it takes some blame off the modem.

Speeds are good now.  I'm getting 97 down.  Network congestion has to be the issue in the evenings.

New Contributor III
Cox Cable came out to check my line and said my modem is fine and the problem is on their end.  They need to send another tech out to fix whatever is broken in the box in the sidewalk.  I appreciate all of your help anyway.  I've had two issues with this system and this forum helped me immensely both times.