RE: DHCP

From: Kenneth Wygand (KWygand@customonline.com)
Date: Thu Oct 14 2004 - 14:56:24 GMT-3


Tim,

Here's a clue. You didn't mention what you wanted the subnet mask to be
on your clients: 255.255.255.0 or 255.255.255.128 or something else.
Does the question state this?

If so, how does the DHCP server (which is a router, in your case) know
what subnet mask to distribute to a client's request? This is a field
that must be distributed in the server's "DHCP offer" packet to a
clients "DHCP Request" packet.

Once you have the answer to this, you answered your own question. ;-)

Kenneth E. Wygand
Systems Engineer, Project Services
CCIE #13720, CISSP #37102, CCNP/DP, ACSP,
Cisco IPT Design Specialist, MCP, CNA, Network+, A+
Custom Computer Specialists, Inc.
"Failure only occurs at the point in which one stops trying."
-Anonymous

Custom Computer Specialists, Inc.
"Celebrating 25 Years of Excellence"
 

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie2be
Sent: Thursday, October 14, 2004 1:42 PM
To: Group Study
Subject: DHCP

Hi guys,

I need to configure dhcp to meet these requirements:

Assign ip addresses from 163.3.6.128 thorugh 163.3.6.250
Exclude ip address: 163.3.6.130

My solution was like this:

ip dhcp excluded-address 163.3.6.251 163.3.6.255
ip dhcp excluded-address 163.3.6.130
!
ip dhcp pool ADDRESSES
   network 163.3.6.128 255.255.255.128 <-- Is this allowed?

However, the "official" solution was like this:

ip dhcp excluded-address 163.3.6.251 163.3.6.255
ip dhcp excluded-address 163.3.6.130
ip dhcp excluded-address 163.3.6.0 163.3.6.127

ip dhcp pool ADDRESSES
   network 163.3.6.0 255.255.255.0

So, the only difference between my solution and the official solution
was that
I used a different subnet and mask and therefore shouldn't need to
exclude
host ip addresses from 0 to 127.

I can't test this, so I was wondering if my solution would work OK.

Thanks, Tim



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