Solved

What is difference in ip scheme of /32 and /24 in router settings

Posted on 2014-11-09
7
179 Views
Last Modified: 2014-11-09
Hi,
was recently trying to set up a new ip mapping on a netscreen 5gt and noticed that in the ip address box you could either use /24 or /32 after the entry for instance of the static ip supplied by the isp.  Didnt want to put incorrect entry so would appreciated an explanation of when to use which number either /24 or /32.  thanks
0
Comment
Question by:dankyle67
[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
7 Comments
 
LVL 50

Expert Comment

by:Don Johnston
ID: 40431302
If you mean the untrust interface, you would use whatever IP address/mask that your ISP has assigned you to use.
0
 
LVL 94

Expert Comment

by:John Hurst
ID: 40431384
you could either use /24 or /32 after the entry for instance of the static ip supplied by the isp



/32 is a subnet mask of 255.255.255.255 and so is one IP address which is all you want for the external IP field in a Juniper 5GT (at least we just use one external IP address in our several client 5GT setups.
0
 

Author Comment

by:dankyle67
ID: 40431436
We have 4 static ip addresses which we have to map to 3 internal servers.  The other static ip we would use for the netscreen itself.  So if i put /29 is that better since we have the 4 addresses or will /32 still work as long as i create the 3 separate ip mappings?  What about /24 is that for the internal client ips?  We only have 22 machines at the office.
0
Visualize your virtual and backup environments

Create well-organized and polished visualizations of your virtual and backup environments when planning VMware vSphere, Microsoft Hyper-V or Veeam deployments. It helps you to gain better visibility and valuable business insights.

 
LVL 94

Expert Comment

by:John Hurst
ID: 40431441
You would have to check your 5GT to see if it can map 3 separate external IP addresses internally. I use internal addresses for multiple servers in my environment.
0
 
LVL 94

Accepted Solution

by:
John Hurst earned 300 total points
ID: 40431446
I use /24 to set up the internal range multiple devices (servers or workstations)
0
 
LVL 69

Assisted Solution

by:Qlemo
Qlemo earned 200 total points
ID: 40431481
The netmask needs to be as provided by the ISP, as said already. Otherwise you might not be able to reach some other sites, or not allow routing to your additional public IPs.
So, if you have 4 usuable addresses your IP block spans 8 addressses, corresponding to /29. The first and last one are reserved, one is used by the provider as the next hop for your router.
0
 
LVL 94

Expert Comment

by:John Hurst
ID: 40431762
@dankyle67  - Thank you and I was happy to help.
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

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

#Citrix #Citrix Netscaler #HTTP Compression #Load Balance
PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
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…

756 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