[NTLUG:Discuss] Re: DHCP

[Burton Strauss]

Not really ... Understand that the DHCP standard (RFC I forget the #) says
that as part of the assignment, there SHOULD be a test to make sure the
address is not in use.  It's possible - but inadvisable - to claim
compliance with the RFC without implementing "SHOULD"s (that's vs. a MUST).

Still, any modern server and stack will prevent the allocation and/or detect
it later on.

Is it a GOOD thing to do?  No.  Why ask for trouble.

-----Burton
 

-----Original Message-----
From: discuss-bounces at ntlug.org [mailto:discuss-bounces at ntlug.org] On Behalf
Of hdasilva at usa.net
Sent: Thursday, October 20, 2005 8:34 PM
To: discuss at ntlug.org
Subject: [NTLUG:Discuss] Re: DHCP

I think that this is a fair and true statement.

Terry wrote:
> Is this an accurate statement (pertaining to a Linux DHCP server 
> presiding over [mostly] MS PCs)?
>  
> "Having a system with a static IP assignment that is inside the range 
> of IPaddress' used by a DHC P server is not acceptable.  Reason being:
>  If a new computer comes on-line, it may be issued that particular 
> IPaddress, and if so, there will be a problem.  This may never happen 
> on a small network. If there are only a handful of computers on the 
> network (half a dozen or so), you may never run into this sort of 
> problem.  BUT, if and when the network grows and gets to be fifty or a  
> hundred strong, sooner or later, this problem will rear it's ugly 
> head.  A computer will come on-line and be issued an IP address that 
> has been set as a static address to another computer, .. . and then, 
> later on, that other computer with the static IP address will come 
> on-line, and at that point they will both compete for access that only 
> one can have. During the competition neither of them will get any 
> access and only when one gives up will the other gain any bandwidth or 
> access to any outside networks. Fixed IPs should _only_ be assigned to 
> IP address that are outside the range used by the DHCP server."
> 
_______________________________________________
https://ntlug.org/mailman/listinfo/discuss