QoS for Video Surveillance

By IPVM Team, Published on Dec 29, 2017

Along with VLANs, QoS is one of the most misunderstood topics in IP surveillance networks. Many purported "experts" claim it is required in any and all surveillance systems, but little clear guidance is given about why, leaving those new to the field confused. In this note, we cover the basics of QoS, what it is, how it is applied, and when it should be used.

Inside we explain:

  • What is Quality of Service
  • How Quality of Service is Applied
  • Limitations
  • Practical Uses
  • Setting up QoS
  • Quiz Yourself: 5 Question Quiz to measure your knowledge on QoS for Surveillance

This is one of many tutorials on networking for surveillance. Others include: Wireless Networking for Video Surveillance, Network Addressing for Video Surveillance, Bandwidth Guide for Video Surveillance, Remote Network Access for Video Surveillance, Network Monitoring / SNMP for Video Surveillance, and more.

What ** ******* ** *******?

******* ** *******(***) ****** ** ********** used ** ****** ********************* ******** ************. *********, it ** ******* **** IP ***** ** **** services *** ******* ** the **** ******* ** typical **** ******* (**** transfers, ******** ***, ***.). Video *** ***** *** highly *******-*********, ****** ***** other ********, *** *** be ********* ******** ** bandwidth ** *** *******, resulting ** **** ******* and **** *******. ***** issues *** ****** ** dropped ******, ******** *******, camera ************** ** ***** undesirable ** ************* *******.

How *** ** *******

***** *** ***** ******* by ***** *** ** generally *******:

  • ** ***********:******* *** ** *********** is ******* **** ******. This ****** *********** *** allocates ********* ***** ** the **** ** *********** it ******. *** *******, FTP ******* *** ** assigned * ***** ******** than ********* *****, ** maintain ****** ***** ***** and *******. ******* *** by *********** ******** **** all ********** (*******, ********, servers, ***.) ******* ***, normally ***********, *** **** ****** means ***** ** ******* traffic ** *** ***********.
  • ** ****:***************** ** ******** ********* QoS, ******** * ******** VLAN ****** ******** **** the ****** ***, ** cameras, *******, *** ******* clients ******* * ****** share ** *********. ******* QoS ** **** ******** that *** ******* ******* VLAN *******, *** *** is *** ** *** switch, ********* ******* ******* at *** *******.
  • ** ****:*******, *** *** **** be *** ** ****. This ** ********* *** used ** ********, *** may ***** ** ********* by ******* ************** ** database ******* *** ******* a ******* ****** ** guaranteed ********* ** ******* their ****, ***** ***** performing ******* *****, ** not. **** ****** ** more ****-********* ** *********, since *** ***** **** be **** ** ******* login, ****** ********** **********.

** ****** ***** ****** is ****, ** *** is *******, ******* ******** must ** ****, ** QoS *** *** ** configured ** ********* ********. Below ** ******* ** example ** ******* ******'* QoS ******** [****: * Cisco ****** ** ***** as**** *** **** ****** in ************ ********].

QoS Settings on Managed Switch

**** *******, ***********, **** ********* ******** that ***** **** ***.** and **** ******** ****.

No **********

*** ** * ************** in **** *****, *** not * ********* *********, arranging *** ***** ** which ******* / **** are ****** *** *******. Some ******** *** ***** bandwidth ***********, ******** ******** services ** ******* **** X ****** ** *********, instead ** * ****** prioritization. *******, **** ** generally *** ****, ** it ** ******** ** more ********* ********** ********, and ********** ** ***** connections ******* ******** ** WAN ***********. ** **** cases, ************** *** ******** is **********.

Dedicated ** ****** ******* ***

*** ************* ***** * dedicated ******** ******* (**** ****** ** ** video), *** **** **** little ********* ******. ***** below *** *** ********** derived **** ********** ******* which ********** *** ***** majority ** ************ ******** are *********, *** ******** likely **** *** ******* from ***.

***** *** ** ********* gains ** ******** *******, i.e., ************, ****** *******, and ** ******** *** used ** *** **** network, *** ******* **** is ****** ***********.

** ****** ********, *** may ** ***** *** systems ** *** ****. In * **** ** eight ****** ****** ******* a ****** ** * small ****** ** ****** applications, ******* *** **** available ********* ******* *** is **********. *******, ** larger *******, **** ** schools, ***-***** *******, ****** environments, ***., *** ** more *********, ** *** necessary, ** ***** ******** may ****** ****** *********.

Setting ** ***

*** *******, ** * shared ********** *******, ***** IP ************, *****, *** data *** *** *******, QoS ** ********* *** in *** ** *** ways:

  • *****, ** ***********, ***** DiffServ ******* ** ********** applications. *********, ***** ** prioritized *****, ******** ** video, **** **** ********, internet ****, *** ***** general ****. *********** ** voice ** **** ********** to *****, ***** ***** may ****** ***** ******* better, ****** ***** *** higher ********. ** ** example ** **** ** IP ****** ***** *****. When ***** ********, *** must ** ********** ** each ******, ********* ** entering * ******** **** point (****), ***** ********** to ******** *****, ******** in *** ******. ** some *******, ********* ***** may ** *** *** services **** ** *****, video, *****, *** **********, so ***** ********* *** prioritized **********. ****, *** not ***, ** ******* supports ******** ** ***** ahead ** *** **** to *** **** ******. Below ** ******** ************* for * ********* ******:

DiffServ Configuration on IP Camera

  • ******, ** ****. ** this ****, *** ****** voice ****, ******** ** security, *** ******* ** file ******** *** ******** data ***** ***** ** assigned *** ** * whole. *** *** **** part, **** ** *********** the **** ** *** by ***********, *** ********************* ** *** ****, meaning **** ********** *****, audio, */* ****, *** other ***-***** ****** ********* all ******* *** **** priority.

CBR **. *** *** ***

**** ******* * ******* enabled *** ***, *** can *** ** **** camera ******* ** ******* quality ** *******. ** do **, ****** / *** **** bit **** ****, ** CBR, ** **** **** constrain ******* *********** **** network. ********* *** *** will ******* *** **** predictable *******. ***** *** or *** **** **** provides * ***** ********* target, ******** ****** ********** of **********, ***** *** provides ************** ** *******, reducing ******* *** ****** loss. *****, ***** *** bitrate ******* *** * Hikvision ******.

IP Camera Bitrate Settings

***********

***** **** *********** ****** to *** ***** ************ systems ** * ********* network, *** ** ********* not ******. ** ******, shared ********, *******, ** becomes ***** ** ********** unexpected *********** ***********.

Test **** *********

**** ***** ******** *******

[****: **** ******** *** originally ********* ** **** and ************* ******* ** 2017]

Comments (14)

Thanks for the great article :) Would love to see more on managed switch settings for video optimization and security. Personally I don't think that I use a managed switch to its full capacity.

rbl

Extra security always a good idea. But if you don't have any video quality issues then I would say let it be unmanaged. And you will never use a truly managed switch to its full capacity capabilities because many of the settings are for special situations and sometimes old technology. I see more problems with customers that decide to tinker around in the settings doing more harm than good. Not saying you would be one. But I know I have locked myself out of my share of switches/routers. 

You may already be aware of this, but one beneficial thing your managed switch should be able to do that comes in handy is turning POE on and off for each port. Network admins lazy cure all. Boot it.

Great article

Given most integrators prefer to run their surveillance systems on a dedicated network, QoS is generally not needed. 

Yes but even with all the cameras on a dedicated network, the viewing clients are typically on the corporate LAN. Moreover, this bandwidth demand is not bound to the number of camera streams, but to the number of viewers of those streams.

Wouldn’t QoS possibly be helpful when deployed on those segments?

Given most integrators prefer to run their surveillance systems on a dedicated network, QoS is generally not needed.

QoS could still be important on a private LAN if you consider that you may have cameras that are more critical than others and possibly have choke points with uplinks in your network.

Wouldn’t QoS possibly be helpful when deployed on those segments?

This would depend on the capabilities of the camera, are you multicasting?  Then no, but if you set up multicast into the customer's environment will you melt their core?  Maybe.  Without the correct forever morphing network design (or you can use the right core equipment and then yes, multicast is easy), this might not be the route you want to go.  If you do, call us.

If you are doing two unicast streams from the camera (if capable), then you are using twice the bandwidth (assuming same quality, frames, etc.).  QoS will be helpful if you have cameras more important that others.

However if you are pulling from the VMS, then you can design it such that this should not be an issue.

 

 

No, Walter I’m not talking about multicasting or ‘melted cores’ or ‘forever morphing network design’ or even cameras really.

I’m talking about QoS as it pertains to video distribution on a corporate LAN.  Your garden variety stuff.

I was trying to answer the question completely. I will try a general answer though, gotchas included:

If you have a lot of camera data and certain cameras matter or on the customer's network camera data means more that other traffic (like general internet) then yes, QoS can benefit if there is a constriction in the network.

My 1st answer was trying to address the challenges in the dedicated network, the uplinks to the customer network and possibly video needed across a WAN link. QoS can address priority or address reserved bandwidth, usually not both.

forever morphing network design

Sounds cool. What is it?

QoS of some type is beneficial to any size network. Even a single computer. Especially a windows PC. Usually one PC on an Internet connected network has sufficient amount of bandwidth. But lets just say they only have a 5 mbps up and down Internet connection. And user leaves Window updates to default settings. When patch tuesday rolls around the corner while the user is online gaming, there will be issues. Microsoft will open about 30 download and 30 upload connections at once. Which stomps the quality right out of your service.

Microsoft will open about 30 download and 30 upload connections at once. Which stomps the quality right out of your service.

With or without the gamer online, it sounds like the Internet for the office is going to be impacted.  So how would you configure the QoS in such a situation containing surv video as well?

.

However, this is generally not used, as it is featured in more expensive enterprise switches, and restricted to trunk connections between switches or WAN connections.

Generally not used maybe, but it is also featured in sub $20 SoHo wifi routers/switches/APs. No restrictions that you mention either. 

I know my beloved Mikrotik will win this argument and require an edit to original post.

You're doing great job posting those network-related articles!

regarding this one, I agree with a conclusion: most of the security networks are physically separated from the data networks, so QoS is not something people need to think about. And if we have a big corp network with different services, including CCTV, there's always a qualifier network admin to think about architecture so CCTV guy don't need to do anything, except setting up the numbers in the device settings

Read this IPVM report for free.

This article is part of IPVM's 6,604 reports, 890 tests and is only available to members. To get a one-time preview of our work, enter your work email to access the full article.

Already a member? Login here | Join now

Related Reports

Ubiquiti Access Control Tested on Oct 21, 2020
Ubiquiti has become one of the most widely used wireless and switch providers...
Remote Network Access for Video Surveillance Guide on Jul 27, 2020
Remotely accessing surveillance systems is key in 2020, with more and more...
Quantum Dots Potential for Surveillance Cameras Explained on Sep 08, 2020
Quantum dots are starting to be used in TVs for better images, but how will...
Access Control and Video Integration Statistics 2020 on Oct 08, 2020
Video Surveillance and Access Control are two of the most common security...
Uniview Deep Learning Camera Tested on Jul 14, 2020
Uniview's intrusion analytics have performed poorly in our shootouts. Now,...
Top Video Surveillance Service Call Problems 2020 on Oct 23, 2020
3 primary and 4 secondary issues stood out as causing the most problems when...
Avigilon ACC Cloud Tested on Jul 08, 2020
Avigilon merged Blue and ACC, adding VSaaS features to its on-premise VMS,...
Milestone XProtect on AWS Tested on Sep 21, 2020
Milestone finally launched multiple cloud solutions in 2020, taking a...
Temperature Screening Is Ineffective, Says US, UK, Canada, Israel, And Ireland Health Leaders on Aug 25, 2020
Health leaders around the world are increasingly speaking out about the...
Ava / Vaion Releases Cloud Connected IP Cameras, Verkada Competitor on Oct 01, 2020
Ava (formerly Vaion) announced its new direct-to-cloud AVA Aware IP cameras...
OnTech Smart Services Partners With Google and Amazon To Compete With Integrators on Sep 25, 2020
A pain point for many homeowners to use consumer security and surveillance is...
Virtual ISC West and GSX+ Exhibiting Contrasted on Sep 17, 2020
Both ISC West and ASIS GSX are going virtual this year, just weeks apart, but...
Actual Coronavirus Testing Options Examined on Aug 13, 2020
Fever cameras have emerged as an indirect and flawed way to test for...
Verkada 2020 Cameras Image Quality Test on Oct 06, 2020
Verkada's first-generation cameras suffered from numerous video quality...
China's SMIC Hit By US Trade Restrictions, Impact On Video Surveillance on Oct 13, 2020
US trade restrictions have hit Semiconductor Manufacturing International...

Recent Reports

Motorola Solutions Total Revenue Down, Video Revenue Up on Oct 30, 2020
Motorola Solutions' total revenue is down, but video (both fixed and...
Recruiters Show 2020 On-Demand Recordings on Oct 30, 2020
Recordings from the 12 recruiter presentations are now available...
Consultants Show 2020 On-Demand Recording on Oct 29, 2020
Recordings from the consultant show are available on-demand at the end of...
Hikvision AcuSense G2 Camera Test on Oct 29, 2020
Hikvision has released their next generation of AcuSense analytic cameras...
Biggest Problems Selling Access Control 2020 on Oct 29, 2020
Access control can cause integrators big headaches. What practical issues do...
Taiwan Geovision AI Analytics and NDAA Examined on Oct 29, 2020
Taiwan manufacturer Geovision's revenue has been falling for years. However,...
Bedside Cough and Sneeze Detector (Sound Intelligence and CLB) on Oct 28, 2020
Coronavirus has increased interest in detecting symptoms such as fever and...
Fever Tablet Thermal Sensors Examined (Melexis) on Oct 28, 2020
Fever tablet suppliers heavily rely on the accuracy and specs of...
Verkada Fires 3 on Oct 28, 2020
Verkada has fired three employees over an incident where female colleagues...
Eagle Eye Networks Raises $40 Million on Oct 27, 2020
Eagle Eye has raised $40 million aiming to "reinvent video...
Hikvision Q3 2020 Global Revenue Rises, US Revenue Falls on Oct 27, 2020
While Hikvision's global revenue rises driven by domestic recovery, its US...
VICE Investigates Verkada's Harassing "RawVerkadawgz" on Oct 26, 2020
This month, IPVM investigated Verkada's sexism, discrimination, and cultural...
Six Flags' FDA Violating Outdoor Dahua Fever Cameras on Oct 26, 2020
As Six Flags scrambled to reopen parks amid plummeting revenues caused by the...
ISC Brasil Digital Experience 2020 Report on Oct 23, 2020
ISC Brasil 2020 rebranded itself to ISC Digital Experience and, like its...
Top Video Surveillance Service Call Problems 2020 on Oct 23, 2020
3 primary and 4 secondary issues stood out as causing the most problems when...