Subnetting for Video Surveillance

By: John Scanlan, Published on Apr 30, 2019

This guide explains when subnetting is used on security networks, and how it works. We explain how to add or remove IP addresses to your range, borrowing bits, and the role of the subnet mask.

free image

****** **** ****** ** provide *********** **:

  • *** ********* **** *****
  • *** **** ** *** subnet ****
  • ********* *** ** ****
  • ********* *** ** ****
  • ****** *** ** ********

Why ****** ** ***** ************

***** *** * *** reasons ************** *** **** to ****** ***** ******** network, ******** *****:

  • ******* *** ** *********
  • ******* ********
  • **** ** **************

Running *** ** *********, *** ******* **********

*** **** ****** ** address ****** ** ***.***.*.* (a ***** * *******) which ******** *** **** addresses. *******, ** **** mid-sized ************ *** ******** systems, **** ** * school, ****, ** ***** facility, ***** ********* *** be ******* ******** ** cameras *** ****. *******, adding ****** ******* *** consume ** ******* *** each **********. ******** ****** to ******* ****** ******* consume ********** *********. ********* viewing ******** **** **** require *********, ***.

** ****** ******** ****** mask ** *** *** (255.255.255.0 ** ***.***.***.*), *** network ***** ** ********** 255 ********* ***** *** be **** *** ********** devices. ***** *** **** this **** ******, ** using * **** ** 255.255.240 ***** ******* ****** 4,000 ******* ** *** subnet.

Network ********

** ***** ********* ******* for ********* ******* ******** (e.g., ************ **. ******* LAN **. *****), * device ** ****** ** prevented **** ********* * device ** *******. ** simply ****** **** *** route ** *** ***** host.

********** ** **** ***** deployed *********, ***** ** **** more *********** ** ****.

Ease ** **************

********* ********** ****** *** to ****** ** ** scheme **** * ********* and ********** ****** ** hosts. **** ******** * network ** ***** ********** ****** * ***** ******* it ** ******* ** scan * ******* *******, closer ** ****** ** actual **-*** *******, ****** than **** ********* ** unused *********; *.*.

******** ***.**.*.* - ***.**.***.*** with ****** ***.***.*.* = 65,534 *********

******** ***.**.*.* - ***.**.*.** with ****** ***.***.***.*** = 30 *********

*** ******* **** *** classfull ****** **** **** take ***** * ***** to **** **** * discovery ****, ************ ** *******, ***** *** ******* subnet **** **** **** just *******.

Subnetting ******

*** ****** **** ** a ********* ************* ** the ** *******, *** determines ***** ***** ** an ** ******* ******* the "*******" **. *** "host." ** ********, *** vast ******** ** ********, surveillance ********, *** ******* subnet *****, **** ****** classfull **********, *** *** IP ******* *****, **** commonly ***.***.***.*.

[****, *** **** ***** we *** **** ********* with ******* ********* ***** are ****** **** * classes *****.]

*********Addresses / ******* ** *********

********** ******* *** ****** mask **** ********* (***** A = ***.*.*.*, * = ***.***.*.*, * = 255.255.255.0) ** ********* ***** borrowed **** ** ****** those ******, *** ** doing ** ******* *** amount ** ***** *** networks. *** *** ****** to ****** ******** ***** and ******** ******** ** decrease ***** *** ******** networks. *** ******* ***** shows *** ****** ***** for **** ***** *** the ****** ** ***** and ******** ********** **** each.

Default Subnet Masks and Classes

*** ***** ***** ***** how **** **** ** the ****** ****. *** network **** *** *'*, and * **** ** 8 *'* (********) = 255. *** **** **** are *'*, ***** ******** = *. *** ******* below ***** *** ******* subnet **** *** **** class, *** ********** ****.

Subnet Masks Represented in Bits

Subnet **** ********** ******** *** *****

********* **** *** ********* subnet ***** ** **********, also ****** ********* **********. The *** **** **** is **** ** ** borrowing **** **** *** other **** ** **** by ******** * ** 0 ** * ** 1. ** **** ***** are ******* **** **** are ******** **** *** network *******, *** **** more ******** *** ******* bits *** ******** **** the **** *******.

Subnets ** ***** ***********

*** ****** ****** ******** which ******* **** *** device *********, ****** ***** are **** ***** **** to ****** *** ******* to ** ********** ****** or *******. **** ** done ** ******** *** last ***** ** *** mask. *** ***** *** that ** *******, ** additional *** **** ****** becomes *********.

** * ********* *******, changing ****** **** **** 255.255.255.0 ** ***.***.***.* ** * ***.***.*.* network ****** ***** ** expand **** *** ***.***.*.* network ******* ***** * router, * ***** ** 510 ***** ******* ** 255, *********** ******** ********* IP *********. ******** *** mask ** ***.***.***.* ******* this ******* ** *,*** IPs (***.***.*.*-***.***.*.***). **** ** illustrated *****.

Subnetting Examples

** *** *** ****** masks ****** ********* *********, users *** ***** ********** ********* ****** ***********.

Comments (26)

Undisclosed Distributor #1

04/30/19 01:25pm

*** ***** ** *** skirts ** **, *** everyone ******** ** ******* up ******* ******** ****** be ******** **** *******. This ******* *** ******* subnets *** ***** *** personal ***, *.*. ******* from *** ****** **** one ** ***** ********* will ** ******* ** the **** ******** ******* of ********* **/*********. ***** subnets ******* **.*.*.*, ***.**.**.*-***.**.**.* and ***.***.*.*.

********** *** ** * tricky *****, ********** *** bit **** **** ******* unreachable *** ***** *** insane. ** ***'** ***** this *** * ****** I ***** *** ***** books *** ***** **** networking ** ** ********* insightful (**** ** *** bit *****) **** ** you ***'* **** ** pursuing *** *************.

**** ***********!

Bob Brislin

IPVMU Certified | In reply to Undisclosed Distributor #1 | 05/01/19 12:33pm

******* *** * *** blocks *** ***** *** the ******* ***** :

**-*** *****: **.*.*.* ~ 10.255.255.255 : *-*** ****** (255.0.0.0)

**-*** *****: ***.**.*.* ~ 172.31.255.255: **-*** ****** (***.***.*.*)

**-*** *****: ***.***.*.* ~ 192.168.255.255: **-*** ****** (***.***.*.*)

Undisclosed Distributor #1

In reply to Bob Brislin | 05/02/19 01:36pm

******* ********** ***** ******** Version *, *** ******* IP **********.

*******

(****** ** ******* * better ****)

Bob Brislin

IPVMU Certified | In reply to Undisclosed Distributor #1 | 05/02/19 03:46pm

*** ******** - * meant *** ****

Undisclosed Integrator #2

05/01/19 01:19am

**** ** *** ****** me. * ***** * will **** **** ** interact **** * ******* containing **** **** *** devices.

*** *** ***** * don't ***** ********** ** how *** ******** * router **** ** ******* of ***.***.*.* ** **** to ******** **** ********* with ** ******* ** of ***.***.*.***. ** **** 3rd ***** *****'* *****, wouldn't ** ** *********** by *** ******? ** does ** ****** ********* when *** ****** ***** is *******?

Avatar

Sergio Guzman

IPVMU Certified | In reply to Undisclosed Integrator #2 | 05/01/19 02:11am

**** **** ** ****** a ****** ***** *** you *** **** *** one *** ****. **'* not **** *********.

Avatar

Craig Mc Cluskey

In reply to Undisclosed Integrator #2 | 05/01/19 03:28am

*** ****** **** ********** which ***** ********* * device ** * ******** address *** *****. *** any *** ** *** subnet **** ***** ** a "*", *** ********* address **** ** ********* to **** ** *** device's ******** *******.

** *** **** * subnet **** ** ***.***.***.*, a ****** ** ***.***.*.* would ** **** ** reach ******* ** ***.***.*.* to ***.***.*.***. [**'* *** since *** ** ******* reserved.] *** ***** ***** "octets" ***** *** *** all "*"*, ** * reachable ******'* ******* **** be ********* ** *** first ***** ****** ** the ****** ** ***.***.*.*, i.e., ***.***.* .

** *** ******* *** subnet **** ** ***.***.***.*, a ****** ** ***.***.*.* would ** **** ** reach ******* ** ***.***.*.* to ***.***.*.***.

*** *********** #*'* "****** mask ***** *********" ***** and ******* *******.****.***. (** *** *** really **********).

Undisclosed #5

In reply to Undisclosed Integrator #2 | 05/01/19 12:30pm

** **** ** ****** reachable **** *** ****** digit ** *******?

***, **** ** *** concept ** ****** ***** exactly.

**** *** ****** **** an ** ******* ***** to ******* ** ******* device **** ** ** address, *** ** *** first ****** ** ***** to ********* ** ** that ***** ****** ** on *** **** *** (meaning ** *** **** packets ** ** ********), or ** ** ** a ****** ******* (******* the ******* **** ** be **** ** * router, *** *** **** route **** ** *** appropriate ****** *******).

*** ****** **** *** local ** ******* *** used ** ******* ***** IPs *** ***** *** which *** ******.

** *** *** * subnet **** **** ***.***.***.***, then **** ******* ***** the *** ***** (*****) match ***'* *********** ** able ** **** ******* directly ** **** *****. (subnet ***** ***** *** 4th ***** *** ***-**** are **** ****** ** datacenters ***** *** ***** only ** ********* * IP ********* *** **** specific ***).

DC Long

In reply to Undisclosed Integrator #2 | 05/02/19 02:48am

*** ******* ** *** same ****** *** ** the **** ********* ****** talk ******** *** *** not ** ******** **** EACH *****. * *** network **** *** ***** issues ** *** ****** broadcast ******. ****** ******* private ******* **** ** routed ** * ******. So *** **** **** router **** ** ***** Mikrotik, ***. ******** ******** Like ***** ******* ******* isolation *** ******** ******** IE. *******

Undisclosed Distributor #1

In reply to Undisclosed Integrator #2 | 05/02/19 08:50am

*** *** ***** **** to **** **** ******** containing **** **** *** devices, *** ******* *** that *** **** ********* networks **** **** ***** to **** **** ****. The **** ****** ********* would ** * ***** business **** *** ********* a ***** ***** ** public ** ********* ** order ** **** ********* on ***** *** ******* and ******* ****** ** the ********. *** *** will ***** *** ******* amount ** ** ********* that ** *** *** away **** (**** ****** pretty ******* *** ****** IP *********) *** **** will *** ** ********** to ** ****. ** most ***** * ******* will *** * ***** of * ****** ** addresses ***** ** * 255.255.255.240 ****** (** ***** only * *** ******** accessible, *** ***** ** the ***** ** *** "network" ***** *** *** the **** ** *** block ** *** "*********" address, ******* ** *** 0's ** *** *******, broadcast ** *** *'*)

** **** *** ****** complex, * ***** **** myself ******* *** *** chart -> *** - 64 - ** - 16 - * - 4 - * - 1, *** * ***** it.

**** * ****'* ******* things *** **** ****.

Undisclosed Distributor #1

In reply to Undisclosed Distributor #1 | 05/02/19 03:24pm

**********: ***.***.***.*** ******** * block ** ** ** addresses, * ****** **** said ***.***.***.*** ******** * addresses, ** ***** * are ******.

Undisclosed #6

In reply to Undisclosed Integrator #2 | 05/02/19 07:58pm

*** *** ********://*******.***/** * **** ******'* tool ** **** *** many ******* *** *** reach ** ***** * static ** *** ********* angry.

*******:***.***.*.****:***.***.***.*

*******:***.***.*.****:***.***.***.*

****, ********..*** * ** bored, ****** ** ********* quotes.

Undisclosed #3

04/30/19 06:24pm

**** * ****

Undisclosed Integrator #4

05/01/19 12:31pm

***** *******! - ** you *** *** ** CCTV, ** ***** * book/course **** ******* *** recommend ** ******** ********** from ***** ***** ** a ****** ********?

John Honovich

IPVM | In reply to Undisclosed Integrator #4 | 05/01/19 09:50am

#*, ****** *** **** first *******, ***, *** our**** ** ********** ******* ********* **** ** ********** Course(***** ****** **** *******).

Avatar

Jon Dillabaugh

Pro Focus LLC | 05/01/19 12:08pm

**** * ***** ******** here. **** *** ******** your ******* ****, ** isn’t ****** **********, **’* called ************. *** ****** that *** *** ****** something *******. ***** ***** making ** ******.

Avatar

Lynn Harold

In reply to Jon Dillabaugh | 05/03/19 07:24pm

*** **** ** ** it! * *** ***** to **** ***, **** if ***** ** **** the ******** *********** ** increasing *** ***** ** your *******, ** ** certain ** ***** *** critical/static ********* ** *** bottom ** *** ******* scope. *** *******, *** x.x.x.1 *** **** ******* Default ******* (******** ********* like .* *** .* will ** *** ******** interfaces *** *********/******** *******) and ******* *** **** of *** ******-***** **** octet ******* *** ***** network-specific *******. **** ***, if *** **** **** to ******, *** ***'* have ********* *** **** devices, *** *** ******* gear *****'* *** ** the ****** ** **** address ****** (*'* ***** that ***).

*** * ******/***** **************, I ****** **** ** addressing ****** ***** ** the ***** ***-* ************, plus * * **** out ********* ********* ********. Something **** **** -

*.*.*.* - ******* *******
*.*.*.* - ******* */*
*.*.*.* - *.*.*.** - network *******, ***, ****, etc.
*.*.*.** - *.*.*.** - servers, *******, ************ (*****)
*.*.*.** - *.*.*.** - encoders, ********, *****, */*, intercoms
*.*.*.** - *.*.*.** - reserved *** ***-*****-**** *** come
*.*.*.** - *.*.*.*** - cameras (******-**) *** ****** control (***-****)

*** * ****** **************, video *** ****** (*** intrusion?) ***** ** ** separate *****.

Undisclosed #6

In reply to Jon Dillabaugh | 05/03/19 11:07pm

**** *** * ****** is ****** * *** of ******* *** ***** a ***** ** ***** a ***** ** * supernet. ***** ** **** add ***/***** **** ** IPv6 ** ******* ************** the ****** ***** ** noobs.

Avatar

Jon Dillabaugh

Pro Focus LLC | In reply to Undisclosed #6 | 05/03/19 11:33pm

*** *** ** ***** tag ** ***** *** relation ** * ******** subnet **** *** * given ******* *****. *** networks *** ******* **** subnets. *** ********** ** whether **’* * ****** (super) ** ******* (***) subnet **** *** ******** subnet.

Avatar

Cary Menage

IPVMU Certified | 05/03/19 09:14am

*** **** ****** ********* tools **** *** ******* to **** **** ************? I **** **** ** lacked **** ******* ** their ********* **** * few ***** ****, **** only *** ******* *** A,B ** *.

**** ********** ** **** tools *** ************* ******** NIC's ** ******* ********.

** ***** ***** ** amaze **, *** **** of ***** "*********" **** fundamental ********** *********...

Mike Dotson

Seneca | IPVMU Certified | In reply to Cary Menage | 05/03/19 06:14pm

****...* *** ******** ** Scanner *** *** **** and ** **** *** all *** ****** **** on * ******* *** allows *** ** **** all ** **** ** a ****. * **** useful ****.

Vasiles Kiosses

06/04/19 03:41pm

** *** **** * similar ****** ** ****? Address ***** ****** ** away **** ** *** a **** ************* ** the ************* ** **** important.

Avatar

Bobby Mancia Jr.

MIZELA Corporation | IPVMU Certified | 06/09/19 09:48am

****** * ***** ****** masks ** *** ********* cameras?

Avatar

Jon Dillabaugh

Pro Focus LLC | In reply to Bobby Mancia Jr. | 06/09/19 01:31pm

*** *** ******* ********* devices **** **** * common ****** ****.

Undisclosed #7

In reply to Jon Dillabaugh | 06/09/19 06:47pm

*** *** ******* ********* devices **** **** * common ****** ****.

Avatar

Bobby Mancia Jr.

MIZELA Corporation | IPVMU Certified | 06/09/19 10:51pm

** ***, ***** *** for **** ********. **** goes ** *** *#*.

Login to read this IPVM report.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

Related Reports

Farpointe Data Conekt Mobile Access Reader Tested on Jun 13, 2019
California based Farpointe Data has been a significant OEM supplier of conventional access readers for years to companies including DMP, RS2, DSX,...
Manufacturer Favorability Guide 2019 on Jun 12, 2019
The 259 page PDF guide may be downloaded inside by all IPVM members. It includes our manufacturer favorability rankings and individual...
OSDP Access Control Guide on Jun 04, 2019
Access control readers and controllers need to communicate. While Wiegand has been the de facto standard for decades, OSDP aims to solve major...
China Jaywalking Facial Recognition Guide on May 27, 2019
News reports touting the PRC's AI prowess often showcase facial recognition cameras being used to automatically catch and fine jaywalkers.  In...
Average Frame Rate Video Surveillance 2019 on May 23, 2019
What is the average frame rated used in video surveillance systems? In IPVM's 2011 statistics, the average was 6-8fps increasing to ~10fps in...
Access Control Job Walk Guide on May 22, 2019
Significant money can be saved and problems avoided with an access control job walk if you know what to look for and what to ask. By inviting...
Maglock Selection Guide on May 16, 2019
One of the most misunderstood yet valuable pieces of electrified hardware is the maglock. Few locks are stronger, but myths and confusion surround...
Register Now - Fall 2019 IP Networking Course on May 02, 2019
Register for the Fall 2019 IP Networking Course. For early registration save $50 off the course's normal $299 price. This is the only networking...
Locking Down Network Connections Guide on Apr 23, 2019
Accidents and inside attacks are risks when network connections are not locked down. Security and video surveillance systems should be protected...

Most Recent Industry Reports

Repositionable Multi-Imager Camera Shootout - Avigilon, Axis, Dahua, Hanwha, Hikvision, Panasonic, Vivotek on Jun 19, 2019
Repositionable multi-imager cameras are one of the fastest growing segments in video surveillance, with a slew of new offerings being recently...
Genetec Synergis Cloud Link - Complex, Costly and Confusing on Jun 18, 2019
Genetec's Synergis Cloud Link is complex, costly and confusing compared to competitor access control architectures. Inside this note, we examine...
Startup Vaion Launching End-to-End AI Solution Backed with $20 Million Funding on Jun 17, 2019
An EU / USA video surveillance startup, Vaion, founded by ex-Cisco Senior Directors is launching an end-to-end VSaaS platform with $20 million in...
Biometrics Usage Statistics 2019 on Jun 17, 2019
While face and fingerprint recognition are used regularly for smartphones, it is not as common in physical security. In this note, we examine...
The Scheme Hikvision and China Importers Use To Avoid Tariffs on Jun 17, 2019
Hikvision and numerous China importers are avoiding 25% tariffs by including an SD card slot in their IP cameras to claim they are 'digital still...
Sighthound Transforms Into Enterprise AI Provider Profile on Jun 14, 2019
Sighthound is now rapidly expanding its R&D team, building an enterprise AI service. This may come as a surprise given their origins 6 years...
ADT Eliminating Acquired Brands, Unifying Under 'Commercial' Brand on Jun 14, 2019
ADT is eliminating the brands of the many integrators it has acquired over the past few years, including Red Hawk, Aronson Security Group (ASG),...
NSA Director Keynoting Dahua and Hikvision Sponsored Cybersecurity Conference [Canceled] on Jun 13, 2019
The technical director for the NSA’s Cybersecurity Threat Operations Center will be keynoting a physical security cybersecurity conference that is...
Farpointe Data Conekt Mobile Access Reader Tested on Jun 13, 2019
California based Farpointe Data has been a significant OEM supplier of conventional access readers for years to companies including DMP, RS2, DSX,...
Embattled $400 Million China Funded Philippines Surveillance System Proceeds on Jun 13, 2019
An embattled 12,000 camera surveillance system project that will cost ~$400 million will proceed.  The project contract was awarded, had its...

The world's leading video surveillance information source, IPVM provides the best reporting, testing and training for 10,000+ members globally. Dedicated to independent and objective information, we uniquely refuse any and all advertisements, sponsorship and consulting from manufacturers.

About | FAQ | Contact