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.

***** **** *****, *** is *** ** *** most ************* ****** ** IP ************ ********. **** purported "*******" ***** ** is ******** ** *** and *** ************ *******, but ****** ***** ******** is ***** ***** ***, leaving ***** *** ** the ***** ********. ** this ****, ** ***** the ****** ** ***, what ** **, *** it ** *******, *** when ** ****** ** used.

****** ** *******:

  • **** ** ******* ** Service
  • *** ******* ** ******* is *******
  • ***********
  • ********* ****
  • ******* ** ***
  • Quiz ********: 5 Question Quiz to measure your knowledge on QoS for Surveillance

**** ** *** ** many ********* ** ********** for ************. ****** *******:******** ********** *** ***** Surveillance,******* ********** *** ***** Surveillance,********* ***** *** ***** Surveillance,****** ******* ****** *** Video ************,******* ********** / **** for ***** ************, *** ****.

[***************]

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)

****** *** *** ***** ******* :) ***** **** ** *** more ** ******* ****** ******** *** ***** ************ *** ********. Personally * ***'* ***** **** * *** * ******* ****** to *** **** ********.

***

***** ******** ****** * **** ****. *** ** *** ***'* have *** ***** ******* ****** **** * ***** *** *** it ** *********. *** *** **** ***** *** * ***** managed ****** ** *** ************************ ******* **** ** *** ******** *** *** ******* ********** and ********* *** **********. * *** **** ******** **** ********* that ****** ** ****** ****** ** *** ******** ***** **** harm **** ****. *** ****** *** ***** ** ***. *** I **** * **** ****** ****** *** ** ** ***** of ********/*******.

*** *** ******* ** ***** ** ****, *** *** ********** thing **** ******* ****** ****** ** **** ** ** **** comes ** ***** ** ******* *** ** *** *** *** each ****. ******* ****** **** **** ***. **** **.

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

***** **** *********** ****** ** *** ***** ************ ******* ** a ********* *******, *** ** ********* *** ******.

*** *** **** **** *** *** ******* ** * ********* network, *** ******* ******* *** ********* ** *** ********* ***. Moreover, **** ********* ****** ** *** ***** ** *** ****** of ****** *******, *** ** *** ****** ** ******* ** those *******.

******’* *** ******** ** ******* **** ******** ** ***** ********?

***** **** *********** ****** ** *** ***** ************ ******* ** a ********* *******, *** ** ********* *** ******.

*** ***** ***** ** ********* ** * ******* *** ** you ******** **** *** *** **** ******* **** *** **** critical **** ****** *** ******** **** ***** ****** **** ******* in **** *******.

******’* *** ******** ** ******* **** ******** ** ***** ********?

**** ***** ****** ** *** ************ ** *** ******, *** you ************? **** **, *** ** *** *** ** ********* into *** ********'* *********** **** *** **** ***** ****? *****. Without *** ******* ******* ******** ******* ****** (** *** *** use *** ***** **** ********* *** **** ***, ********* ** easy), **** ***** *** ** *** ***** *** **** ** go. ** *** **, **** **.

** *** *** ***** *** ******* ******* **** *** ****** (if *******), **** *** *** ***** ***** *** ********* (******** same *******, ******, ***.). *** **** ** ******* ** *** have ******* **** ********* **** ******.

******* ** *** *** ******* **** *** ***, **** *** can ****** ** **** **** **** ****** *** ** ** issue.

**, ****** *’* *** ******* ***** ************ ** ‘****** *****’ or ‘******* ******** ******* ******’ ** **** ******* ******.

*’* ******* ***** *** ** ** ******** ** ***** ************ on * ********* ***. **** ****** ******* *****.

* *** ****** ** ****** *** ******** **********. * **** try * ******* ****** ******, ******* ********:

** *** **** * *** ** ****** **** *** ******* cameras ****** ** ** *** ********'* ******* ****** **** ***** more **** ***** ******* (**** ******* ********) **** ***, *** can ******* ** ***** ** * ************ ** *** *******.

** *** ****** *** ****** ** ******* *** ********** ** the ********* *******, *** ******* ** *** ******** ******* *** possibly ***** ****** ****** * *** ****. *** *** ******* priority ** ******* ******** *********, ******* *** ****.

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

****** ****. **** ** **?

*** ** **** **** ** ********** ** *** **** *******. Even * ****** ********. ********** * ******* **. ******* *** PC ** ** ******** ********* ******* *** ********** ****** ** bandwidth. *** **** **** *** **** **** **** * * mbps ** *** **** ******** **********. *** **** ****** ****** updates ** ******* ********. **** ***** ******* ***** ****** *** corner ***** *** **** ** ****** ******, ***** **** ** issues. ********* **** **** ***** ** ******** *** ** ****** connections ** ****. ***** ****** *** ******* ***** *** ** your *******.

********* **** **** ***** ** ******** *** ** ****** *********** at ****. ***** ****** *** ******* ***** *** ** **** service.

**** ** ******* *** ***** ******, ** ****** **** *** Internet *** *** ****** ** ***** ** ** ********. ** how ***** *** ********* *** *** ** **** * ********* containing **** ***** ** ****?

.

*******, **** ** ********* *** ****, ** ** ** ******** in **** ********* ********** ********, *** ********** ** ***** *********** between ******** ** *** ***********.

********* *** **** *****, *** ** ** **** ******** ***** $** **** **** *******/********/***. ** ************ **** *** ******* ******.

* **** ** ******* ******** **** *** **** ******** *** require ** **** ** ******** ****.

***'** ***** ***** *** ******* ***** *******-******* ********!

********* **** ***, * ***** **** * **********: **** ** the ******** ******** *** ********** ********* **** *** **** ********, so *** ** *** ********* ****** **** ** ***** *****. And ** ** **** * *** **** ******* **** ********* services, ********* ****, *****'* ****** * ********* ******* ***** ** think ***** ************ ** **** *** ***'* **** ** ** anything, ****** ******* ** *** ******* ** *** ****** ********

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