Best practice on removing IP Scopes(subnets)

Frank Bulk frnkblk at
Fri Apr 24 16:52:03 UTC 2009

We just did this for our cable modem and DSL subscribers.  It was a simple
as preparing the new subnets and disabling the old ones.  Our lease time is
3 days, so in 4 days they were all migrated over to the new space.




From: dhcp-users-bounces at
[mailto:dhcp-users-bounces at] On Behalf Of Jeremy Phillips
Sent: Friday, April 24, 2009 8:46 AM
To: dhcp-users at
Subject: Best practice on removing IP Scopes(subnets)


  We are currently in the process of moving our IP space.  I'm trying to
remove the old IP subnets from the dhcp server without effecting

Customers or having our helpdesk have 1000's of calls from customers that
need to get a new IP.  Essentially we will be moving 20+ class C's.

I was just wondering how some of you went about this very procedure without
effecting service.  



Jeremy Phillips


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