topic Switch and router configuration in Switching

Switch and router configuration

muraripadhan — Fri, 08 Mar 2019 19:17:11 GMT

Dears

I have 5 department

1-HR

2-SALES

3-Customer service

4-IT

5-Planning Department

My IP class is B and my range is 172.141.0.0/16

My requirement is

I will assign IP for "HR" only 172.141.10.0/16 range

IP for "SALES" only 172.141.20.0/16 range

IP for "Customer Department" only 172.141.30.0/16 range

IP for "IT" only 172.141.40.0/16 range

IP for "Planning Department" only 172.141.50.0/16 range

And If someone give IP on HR with different range like 172.141.60.0/16 then it will not work

I want to assign specific range of IP for specific Department.

How i will configure

Please suggest me and give config file.

Thanks & Regards

Murari Mohan Padhan

Hi,

Julio E. Moisa — Tue, 11 Jul 2017 16:43:54 GMT

Hi,

You need to use VLSM in order to provide proper amount of hosts per subnet, or you could assign a /24 for each department, but you could waste IP addresses. May I know the amount of required hosts per department?

Attached you will find a VLSM file that could be useful.

🙂

Hi Murari,

Deepthi — Tue, 11 Jul 2017 17:44:28 GMT

Hi Murari,

1. The IP segment you selected is not a private IP segment. So, need to use one of these IPs for your internal corp. usage.

     10.0.0.0        -   10.255.255.255  (10/8 prefix)
     172.16.0.0      -   172.31.255.255  (172.16/12 prefix)
     192.168.0.0     -   192.168.255.255 (192.168/16 prefix)

https://tools.ietf.org/html/rfc1918

2. You cannot get /16 subnet from a /16 network. So, you would need to go for more small subnets. I suggest you to use VLSM techniques for this.

http://www.aboutmyip.com/AboutMyXApp/SubnetCalculator.jsp

-Hope these information helps...

Have a good time..

But we are using this network

muraripadhan — Wed, 12 Jul 2017 05:02:21 GMT

But we are using this network in our LAN...since 15 years

Hi Murari,

Deepthi — Wed, 12 Jul 2017 22:57:23 GMT

Hi Murari,

I am not pretty much sure why your corp. are using those IP addresses, but as per the industry standards, those are not the recommendations.

Those are the public IPs used by AOL Inc. if am not wrong according to my search.

IP Address	172.141.0.0
Location	United States, Virginia, Dulles
Latitude & Longitude of City	38.997708, -77.433179 (38°59'52"N 77°25'59"W)
ISP	AOL Inc.

So, maybe I am guessing that you are using those IPs internally without routing it to the open internet.

Even with you set up, you cannot get 172.141.10.1/16 segment from another 172.141.0.1/16 segment as i already informed.

The segment 172.141.0.1/16 involves all the IPs from 172.141.0.1 to 172.141.255.255 and so your requirement of subnetting would be wrong in this case.

So, you may go for smaller subnets such as 172.141.10.1/24, 172.141.20.1/24, 172.141.30.1/24 and so on which can be accommodated within your 172.141.0.1/16 subnet.

Results

Address:	`172.141.0.0`	`10101100.10001101.00000000.00000000`
Netmask:	`255.255.0.0`	`11111111.11111111.00000000.00000000`
Wildcard:	`0.0.255.255`	`00000000.00000000.11111111.11111111`
Network Address:	`172.141.0.0 / 16`	`10101100.10001101.00000000.00000000`
Broadcast Address:	`172.141.255.255`	`10101100.10001101.11111111.11111111`
First host:	`172.141.0.1`	`10101100.10001101.00000000.00000001`
Last host:	`172.141.255.254`	`10101100.10001101.11111111.11111110`
Total host count:	`65534`

Yes we are not routing in

muraripadhan — Sat, 15 Jul 2017 08:06:43 GMT

Yes we are not routing in open internet it is using internally