General discussion

Locked

DHCP Scope..can I delete and recreate..

By defaultuser ·
I am cleaning up the DHCP Scopes I have set and would like to **** away all reservations, exclusions, etc. Can I do this during business hours with little or no impact? My assumption is that since all users have their IP address, the DHCP Scope doesn't matter to them. And with the entire process of deleting/creating a new scope being about 10 minutes, they shouldn't be affected. Someone confirm please.

This conversation is currently closed to new comments.

9 total posts (Page 1 of 1)  
| Thread display: Collapse - | Expand +

All Comments

Collapse -

DHCP Scope..can I delete and recreate..

by Michael2 In reply to DHCP Scope..can I delete ...

Its not a good idea to do anything like that during business hours. Theoretically it shouldn't cause too much problems. Just a couple things to keep in mind.
1)How many users are going to reboot when this is being done, and have an expiring lease.
2)Make sure your new scopes don't conflict with the older scopes.
Standard Disclaimer
Mike

Collapse -

DHCP Scope..can I delete and recreate..

by defaultuser In reply to DHCP Scope..can I delete ...

The question was auto-closed by TechRepublic

Collapse -

DHCP Scope..can I delete and recreate..

by ustutz In reply to DHCP Scope..can I delete ...

The long pole is your lease duration. Let's say you have your duration set to the NT 4.0 default of 3 days. When you delete the scope, you are deleting the database on the server that contains the current leases. Meanwhile your clients "know" that they still have "valid" leases.

Now you create a new scope in the same address space / range. The server has no records of any outstanding leases from the old scope. A PC boots up - it'll get the first available address from the scope. The PC that had that address from before - knwoing that its lease hadn't yet expired - still uses that same IP address, and you have a conflict. Depending on the size of your network / level of control of your users, you can get conflicting PCs (the oldone, without the error message) to run "winipcfg.exe" and then "Release All", and then reboot the PC. Or get all users to do that at once.

There is also an option in WINS (around SP5 or SP6a??) to have WINS check for bad addresses before handing out a lease (by pinging the address - which works only if the old computer is still online at that instant.

Your problems will be less if you have a shorter lease duration (6 hours?). This will increase network traffic, but reduce wear on yoursneakers.

If you have the option, best approach would be to shut down all clients Friday evening, come in Saturday morning when you can experiment to your heart's content, and have everybody reboot fresh on Monday.

Collapse -

DHCP Scope..can I delete and recreate..

by defaultuser In reply to DHCP Scope..can I delete ...

The question was auto-closed by TechRepublic

Collapse -

DHCP Scope..can I delete and recreate..

by mwc In reply to DHCP Scope..can I delete ...

It is not as simple as that. You will need to run"winipcfg" and release and renew the ip leases on all the PCs in order to not have IP address conflicts.

Collapse -

DHCP Scope..can I delete and recreate..

by defaultuser In reply to DHCP Scope..can I delete ...

The question was auto-closed by TechRepublic

Collapse -

DHCP Scope..can I delete and recreate..

by jasonr In reply to DHCP Scope..can I delete ...

you can put a command line in the log in scripts to renew you ips too....

cant remembr the line for 9X but it is possible..

nt line is as we all know

ipconfig /renew

Collapse -

DHCP Scope..can I delete and recreate..

by defaultuser In reply to DHCP Scope..can I delete ...

The question was auto-closed by TechRepublic

Collapse -

DHCP Scope..can I delete and recreate..

by defaultuser In reply to DHCP Scope..can I delete ...

This question was auto closed due to inactivity

Back to Windows Forum
9 total posts (Page 1 of 1)  

Related Discussions

Related Forums