Can you use both ethernet ports at the exact same time?

Depends on your ISP. The company I work for gives you 2 public IP addresses and you can get any combo of 2 computers, 1 computer and one router or 2 routers. You WILL NOT however get full speed on both at the same time but not half either. The modems we use now have only one ethernet port but if you hook up a simple switch you get both IPs through it. But ONLY 2.

Will this support xfinity extreme 1200mbps ? it's not on the supported device list.

The Arris S33 is a DOCIS 3.1 capable device 32 x 8 rated for speeds up to 2.5 Gb. While the modem is indeed on Xfinity supported device list (check detailed discussions on dslreports.com), what matters is your router. Ensure you have a router capable of 1+Gb speeds.

Does this modem support snmp?

NO. I wish that wasn't the case, but we have no SNMP access. No Arris home modems support user facing SNMP. The cable provider has management, but SNMP isn't exposed to the home network. From Arris: "SNMP (Simple Network Management Protocol) is not supported in Motorola Home Networking products. SNMP is included in Motorola Cable Modem and Home Gateway products, but it is intended for use only by the Cable Provider. There is no direct access to SNMP MIBs for the end-user."

Is one port for the router and the other port can be used for hardwiring a device (computer, etc) directly to modem?

The second port can only be used if connected to a separate/different IP. In other words, your ISP will have to give you 2 separate IPs. in order to use the second port.

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🚀 Surf the future with ARRIS S33 — where speed meets reliability!

NEXT GEN DOCSIS 3 1 - Cutting-edge technology delivering 10x faster speeds and reduced lag compared to DOCSIS 3.0.
ROCK SOLID CONNECTIVITY - 4 OFDM channels ensure stable, low-latency connections even during peak usage.
BLAZING MULTI GIG SPEEDS - Experience ultra-fast 2.5 Gbps internet for seamless streaming, gaming, and remote work.
SAVE BIG OWN YOUR MODEM - Slash up to $168/year in rental fees by owning your ARRIS modem—smart savings for savvy pros.
PLUG PLAY SECURE SETUP - Effortless activation with SURFboard Central App plus compatibility with top US ISPs like Xfinity & Spectrum.

The ARRIS Surfboard S33 is a DOCSIS 3.1 cable modem engineered for professional-grade home internet, supporting multi-gig speeds up to 2.5 Gbps via dual Ethernet ports. Certified for major US providers including Comcast Xfinity, Cox, and Spectrum, it features 4 OFDM channels for enhanced stability and a simple app-based setup. Backed by ARRIS’s legacy of innovation and 2-year limited warranty, it’s designed to deliver faster streaming, gaming, and downloads while saving you money on rental fees.

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Brand	ARRIS
Manufacturer	CommScope
Model	S33
Model Name	S33
Product Dimensions	13.06 x 4.57 x 12.04 cm; 408.23 g
Item model number	S33
Compatible Devices	Ethernet connected devices, Personal Computer, Router
Mounting Hardware	AC power cord, Quick Start Guide
Number of items	1
Wattage	120 Watts
Batteries Included	No
Batteries Required	No
Data Transfer Rate	2.5 Gigabits Per Second
Modem type	Cable
Number of Ports	2
Connector Type	Ethernet
Manufacturer	CommScope
Item Weight	408 g

ARRIS Surfboard S33 DOCSIS 3.1 Multi-Gigabit Cable Modem | Approved for Comcast Xfinity, Cox, Spectrum & More | 1 & 2.5 Gbps Ports | 2.5 Gbps Max Internet Speeds | 4 OFDM Channels

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