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
Solved

Change from Class C to Class B!

Posted on 2007-11-13
2
497 Views
Last Modified: 2008-01-09
Hi,

I have 4 sites for my company in different locations, each of the sites is configured as different subnet (for example site 1 is 100.100.100.0, site 2 is 100.100.101.0
...etc). Now I have a device that is connected to the network in one of the sites (this device is PBX VOIP), when I try to ping this device from any site it gives me requested time out, however if I ping it from his own network it works! but if I ping any other device from any other site/network it works fine!

It seems to me that I need to upgrade the subnet mask on the networks to be 255.255.0.0, is that a good solution? What are the impact of such action?

Thanks,
Rami
0
Comment
Question by:nammari
2 Comments
 
LVL 2

Expert Comment

by:Nugsolot
ID: 20276026
If you do you will basicall have 1 Giant Lan ecompassing 100.100.x.x as one.  The Use of the 255.255.255.0 subnet mask lets you break these up.  Grom the sound of you problem it sounds like the device being added doesn't have its Default Gateway configured corectly or there is an arp issue on its gateway.
0
 
LVL 21

Accepted Solution

by:
robocat earned 500 total points
ID: 20276220
Check if the default gateway and the subnet mask is configured correctly on this device. Default GW and subnet mask should be the same as any other device on the same local network, so you should be able to determine the correct settings this way.

Do not change the subnet mask on any other device as the rest of your network seems to work fine.
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Security is one of the biggest concerns when moving and migrating your data from your on-premise location to the Public Cloud.  Where is your data? Who can access it? Will it be safe from accidental deletion?  All of these questions and more are imp…
Are you one of those front-line IT Service Desk staff fielding calls, replying to emails, all-the-while working to resolve end-user technological nightmares? I am! That's why I have put together this brief overview of tools and techniques I use in o…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

856 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