Fast vs. Gigabit Ethernet for Surveillance

By: Ethan Ace, Published on Mar 13, 2012

This guide is intended to help users decide when to use 100 Mbps Fast Ethernet vs 1 Gbps Ethernet in surveillance deployements. It covers:

  • The basics of Ethernet, Fast vs. Gigabit
  • Power over Ethernet support
  • Cost differences 
  • When to use Fast Ethernet
  • When to use Gigabit Ethernet
  • 10 Gigabit Ethernet
  • The future of Ethernet in surveillance

Ethernet Basics

Ethernet, in the context of most networks, consists of two separate standards:

  • Fast Ethernet: Fast Ethernet is the most commonly used standard, capable of 100 Mbps speeds. It is also commonly referred to simply as "Ethernet" or "10/100", though this are technically misnomers, which refer also to the older, original 10 Mbps standard, as well. Fast Ethernet is the basis of most networks, surveillance and otherwise, and is found in the majority of switches, PCs, and surveillance equipment on the market today. 
  • Gigabit Ethernet: Gigabit Ethernet (GbE) is capable of 10x the speed of Fast Ethernet, up to 1000 Mbps, or 1 Gbps. It has historically been used for switch-to-switch connections between network closets, or connecting servers to the network, due to the larger amount of traffic in these scenarios. It has seen limited use in connecting desktop PCs in most environments, simply because these additional speeds are unnecessary for most users.

These two terms actually consist of multiple different standards for copper and fiber Ethernet. Users selecting fiber equipment should be careful, however, as there is much more variation in fiber standards, which differ by distance, topology, and cable type. 

Power over Ethernet

Power over Ethernet is supported on both Fast and Gigabit Ethernet. Previous iterations of the PoE and GbE standards were incompatible, but today, PoE-capable gigabit switches are available. These are largely unnecessary in surveillance, as most equipment does not require gigabit speeds nor is it equipped with gigabit connections. Gigabit PoE is more often used for wireless equipment, as speeds are often higher than 100 Mbps.

Cost Differences

Moving from Fast Ethernet to gigabit is a moderate cost increase. For example, 8-port Cisco 300 series switches, with PoE, compare as follows:

$100 across the total cost of a system is not a significant increase, but budget-conscious users should be aware using GbE only when necessary.

When to Use Fast Ethernet

Get Notified of Video Surveillance Breaking News
Get Notified of Video Surveillance Breaking News

Fast Ethernet (100 Mb/sec) is used for connections to field devices, such as cameras, encoders, and I/O modules. Rarely do these devices support gigabit speeds. However, gigabit switches feature 10/100/1000 Mbps auto-sensing ports, meaning that the switch port will negotiate down to 100 Mbps speeds if a Fast Ethernet device is connected. Despite rapid increases in resolution in the past few years, camera streams are simply not large enough to warrant the use of Gigabit Ethernet for the bulk of the network.

When to Use Gigabit Ethernet

Though its use in connecting between camera and switch is unnecessary, Gigabit Ethernet does have three key uses in surveillance systems:

  • Connecting Switches: When connecting switches to each other, whether in the same rack, or between multiple wiring closets, gigabit speeds are often preferred, if not required. For example, assume a switch handling twenty 4 Mbps streams, a total of 80 Mbps, is to be connected to another switch at the head end. This total required throughput is beyond what a Fast Ethernet link is likely to provide, requiring a gigabit uplink instead.
  • Connecting Servers: When connecting servers to a surveillance network, gigabit speeds may be required. Similar to the above switch example, a 10/100 link may be unable to handle throughput required by a server. This is more common in larger systems, as small systems may be well below Fast Ethernet's usable bandwidth.
  • Storage Networks: When using network-based storage, Gigabit Ethernet should be used. In enterprise-level systems, when connecting servers to SAN equipment, gigabit networks are typically preferred, using a dedicated network. At these levels, likely at least 30-40 cameras, Fast Ethernet simply cannot manage the throughput required between server and SAN. Even in small systems using NAS storage, the bandwidth consumed by camera streaming, one or more viewing clients, and potentially retrieving archived video may be more than a 100 Mbps link can sustain.

10 Gigabit Ethernet (10GbE)

The only likely use for 10GbE in surveillance is for storage interconnects, in cases where throughput is higher than a gigabit network can support. Beyond this, its added bandwidth and cost are unneeded. For the most part, 10 Gigabit Ethernet is used in data center interconnects and in internet routing, where huge amounts of traffic are being passed. 10GbE has a maximum distance of 30m on Cat 6, requiring Cat 6A for full 100m distance. On multimode fiber it may run up to 400m, and up to 10km on singlemode. 

Future Ethernet Needs

We expect that Fast Ethernet will remain standard on cameras for years to come. With even today's highest-resolution cameras well-supported by Fast Ethernet, it will take dramatic increases in resolution at full frame rates to make gigabit necessary. Additionally, we expect compression will continue to improve, lessening the impact of resolution increases, at least somewhat. For these reasons, GbE will most likely remain relegated to backbone and storage connections, instead of everyday use.

1 report cite this report:

Aruba Networks Profile on Feb 22, 2018
Aruba Networks' presence in the video surveillance market has historically been limited. With a company focus on Wi-Fi first and switching...
Comments : Members only. Login. or Join.

Related Reports

Last Chance - Spring 2020 IP Networking Course - Register Now on May 06, 2020
This is the last chance to register for the only networking course designed specifically for video surveillance professionals, taught...
Converged vs Dedicated Networks For Surveillance Tutorial on Feb 12, 2020
Use the existing network or deploy a new one? This is a critical choice in designing video surveillance systems. Though 'convergence' was a big...
BICSI For IP Video Surveillance Guide on Feb 11, 2020
Spend enough time around networks and eventually someone will mention BICSI, the oft-referenced but only vaguely known standards body prevalent in...
Network Cabling for Video Surveillance on Jan 15, 2020
In this guide, we explain the fundamentals of network cabling for video surveillance networks, how they should be installed, and the differences in...
Horizontal Cabling for Video Surveillance Guide on Jan 03, 2020
There are a few options when it comes to professionally installing horizontal cabling for video surveillance networks. The three options examined...
Altronix Claims Tango 'Eliminates Electricians' on Oct 15, 2019
Power supply provider Altronix claims its new Tango power supply 'eliminates the need for an electrician, dedicated conduit and wire runs'. In...
'Bunker Busting' Wireless Access Startup: Sure-Fi Profile on Oct 03, 2019
An access startup is claiming its 'bunker busting' wireless Wiegand radios can punch through 'any obstruction'. We examine their offering,...
Siklu $400 Compact 60GHz Radio on Jul 24, 2019
Siklu first entered the video surveillance market with a $6,000 per link solution, is now aiming down market with their newest 60GHz wireless...
Dahua ePoE Long Distance UTP / Coax Tested on May 03, 2019
Dahua's Enhanced PoE (ePoE) line is claiming extended video and power transmission over 600m without repeaters, with devices interchangeable via...
Cambium Wireless Video Surveillance Profile on Mar 27, 2019
Cambium Networks, spun out of Motorola Solutions in 2011, says "outdoor durable radios are in their DNA" and they are targeting video surveillance...

Most Recent Industry Reports

Viakoo Presents Cyber Hygiene for Cameras on May 28, 2020
Viakoo presented its 'Cyber Hygiene' and 'Service Assurance' products at the April 2020 IPVM New Products show. Inside this report: A...
Seek Scan Thermal Temperature Screening System ReTested on May 28, 2020
Now that IPVM has tested Dahua, Hikvision, and Sunell, we are returning to Seek, the first blackbody system we tested and retested it with our...
Directory of 106 "Fever" Camera Suppliers on May 28, 2020
This directory provides a list of "Fever" scanning thermal camera providers to help you see and research what options are available. There are...
Fever Cameras Are Medical Devices, Per The FDA, Dahua, Feevr, Hikvision, InVid Contrary Claims Are False on May 28, 2020
Fever cameras are medical devices, despite what euphemisms various sellers use. The US FDA clearly categorizes them as medical devices and...
Wyze Raises $10 Million And Seeks Services Expansion on May 27, 2020
Wyze has raised $10 million, the company's first disclosed raise since the $20 million announced at the beginning of 2019. Inside this note,...
Startup Videoloft Presents Cloud Storage on May 27, 2020
Videoloft presented offsite cloud storage at the May 2020 IPVM Startups show. A 30-minute video from Videoloft including IPVM...
Directory of 300+ Fever Camera News Reports Globally on May 27, 2020
This global directory tracks 300+ articles about thermal cameras used to detect fevers in response to the coronavirus pandemic. Articles are...
Integrators Rising Against Coronavirus on May 27, 2020
IPVM integrator statistics make it clear - Coronavirus's impact on business is lessening and many are anticipating even better news in weeks...
Netposa Stock Surges 46% After US Human Rights Abuse Sanctions on May 27, 2020
Last Friday, the US government announced it would sanction PRC video management provider NetPosa for being "complicit in human rights violations...
LILIN Presents NDAA-Compliant P2 Cameras on May 26, 2020
Merit LILIN presented its NDAA-compliant P2 camera series at the April 2020 IPVM New Products show. Inside this report: A 30-minute video...