adding an additional ip range to server

[lkaylor]

I have just been assigned an additional ip scope by our broadband supplier for our school network, we were running out of addresses for clients. No matter what I try no clients are pciking up the new range. I have tried the following with no success.

• turned off firewall
  
• disabled original 'working' scope
  
• restarted the server - updates good on the server
  
• restarted DCHP services
  

I have been advised that it may be a case of scrapping the original ip range and only assigning the new one, which obviously will require a lot of work as we have reserved ip addresses for some of our clients. I can't understand why an additonal range would not work. I have checked all details with the broadband supplier including subnet mask and gateway etc. If someone has any ideas I wouold appreciate it. I would like to avoid the school forking out extra money to an outside IT company if possible.

[NB9457]

Have you added a new Scope completely? DHCP server authorised and scope activated? What's the new Scope? Everything on the same range/subnet? Updated server IP Addresses if necessary?

 

What's the old range and what is the new one?

[lkaylor]

The new assigned Range - 10.4.120.0 255.255.252.0 /22

 

Gateway - 10.4.120.1

the original range is 10.4.219.0 with subnet mask of 255.255.255.0

the new scope successfully activated.

[NB9457]

And I'm guessing you've given all your servers new IPs?

[lkaylor]

No, I didn't know I should. I made the assumption that an additional range meant that it could be used alongside the original scope. I have a lack of knowledge in this area. So, will it be necessary to scrap the original scope then and replace it with new?

[NB9457]

No, I didn't know I should. I made the assumption that an additional range meant that it could be used alongside the original scope. I have a lack of knowledge in this area. So, will it be necessary to scrap the original scope then and replace it with new?

Yeah, you'll need to change all the servers static IP settings to match the new scope. I'd leave the fourth block of the IP the same and just update the rest and subnet mask on each. I'm guessing you'll also have to do all your printers too and anything else with a satic IP.

 

Guessing it's a primary school?

[lkaylor]

Yes, we're a primary school! How'd you guess?

So, will the original scope be useless?

[NB9457]

Yes, we're a primary school! How'd you guess?

So, will the original scope be useless?

Pretty much. I'm guessing there's not much in the way of VLANs or routing and it's a flat network? In which case I'd say just change the IPs over for your servers and printers and see how you get on. I've had to this this in the past when I worked for a managed service and the schools had broadband with the LA so had to be set certain scopes.

[lkaylor]

Thank you so much for your guidance NB9457. I will give this a go after school later this week.

[NB9457]

Thank you so much for your guidance NB9457. I will give this a go after school later this week.

 

No problem

 

Post back and let us know how you get on

[lkaylor]

Will do. thanks again.

[lkaylor]

Hi NB9457,

It was a month ago when we spoke last. I left this ip range task until this Feb half term as I was a little scared .

I have now changed the servers ip address , gateway, subnet etc and pcs are now picking up addresses from the new range which is ace!. However, if I disable the original scope then pcs cannot connect to the internet. I receive message after diagnosing " windows can't communicate with device or resource (primary DNS server).

I activate the original scope and all is well again. I have tested printing and that works too. Would it be detrimental to leave both scopes activated?

regards