Solved

VLSM calcuation

Posted on 2016-10-31
5
45 Views
Last Modified: 2016-10-31
Need to subnet 172.16.0.0/16 across 4 regions and support the following nodes

A1 : 510
HQ: 300
A2 255
A3: 168

Any comment for the network ID used in each region, together with the WAN subnet used in each router ? HQ connect to each region in hub-and-spoke network.
0
Comment
Question by:AXISHK
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 11

Accepted Solution

by:
Miftaul earned 250 total points
ID: 41866739
Are we trying to subnet
Is it an exam question ?
or for production network

A1 - 172.16.0.0/23
HQ - 172.16.2.0/23
A2 - 172.16.4.0/23
A3 - 172.16.6.0/24
0
 
LVL 30

Assisted Solution

by:Predrag Jovic
Predrag Jovic earned 250 total points
ID: 41867133
Recommendation is to prepare locations to grow. Depending on grow projection you can assign more IP address space to some region then you need to, and then, assign as much IP address space to specific network as it is needed.
The reason for this is simple - easy summarization. You can have only one route for each region.

Example:
Region A1 172.16.0.0/18
Region HQ 172.16.64.0/18
Region  A2 172.16.128.0/18
Region A3 172.16.192.0/18

Then you can start assign IP address ranges for networks in specific region
A1 - network 1 - 172.16.0.0/23
     - network 2 - 172.16.2.0/26
     - network 3 - 172.16.y.m/z      <----  63 >=y>=0
HQ - network 1 - 172.16.64.0/23
       - network 2 - 172.16.66.0/25
       - network 3 - 172.16.x.n/z     <----- 127 >=x>=64
etc...

In the case that this was exam question Miftaul gave correct answer - those are smallest IP address ranges for each number of hosts.
0
 

Author Comment

by:AXISHK
ID: 41867147
This is not on production network.

How about the serial subnet, the network subnet between each region to HQ, should I use
172.16.7.224 / 30
172.16.7.228 / 30
172.16.7.232 / 30


Thx
0
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41867169
172.16.7.x/30 is OK
0
 

Author Closing Comment

by:AXISHK
ID: 41867875
Thx
0

Featured Post

Free NetCrunch network monitor licenses!

Only on Experts-Exchange: Sign-up for a free-trial and we'll send you your permanent license!

Here is what you get: 30 Nodes | Unlimited Sensors | No Time Restrictions | Absolutely FREE!

Act now. This offer ends July 14, 2017.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This past year has been one of great growth and performance for OnPage. We have added many features and integrations to the product, making 2016 an awesome year. We see these steps forward as the basis for future growth.
Many of the companies I’ve worked with have embraced cloud solutions due to their desire to “get out of the datacenter business.” The ability to achieve better security and availability, and the speed with which they are able to deploy, is far grea…
Both in life and business – not all partnerships are created equal. As the demand for cloud services increases, so do the number of self-proclaimed cloud partners. Asking the right questions up front in the partnership, will enable both parties …
Both in life and business – not all partnerships are created equal. Spend 30 short minutes with us to learn:   • Key questions to ask when considering a partnership to accelerate your business into the cloud • Pitfalls and mistakes other partners…

728 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question