From: Scott Morris (swm@emanon.com)
Date: Wed Apr 06 2005 - 12:28:47 GMT-3
It's not so much that it's required for the clients... Per the DHCP
specification, if a client offers the client-id, this MUST be matched
instead of just the MAC address. You'll find that some versions of IOS do
this as well (with 'ip address dhcp').
You can also "debug ip dhcp server packet" and see what information is being
sent to you, then match from there!
HTH,
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
James Ventre
Sent: Wednesday, April 06, 2005 10:40 AM
To: ccielab@groupstudy.com
Subject: DHCP Gotcha
When doing DHCP ..... keep in mind you need to know what you're looking
at. MAC Address or Client Identifier??
http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_configuratio
n_guide_chapter09186a00800ca6b5.html
To configure a manual binding, first create a host pool, then specify the IP
address of the client and hardware address or client identifier. The
hardware address is the MAC address. The client identifier, which is
required for Microsoft clients (instead of hardware addresses), is formed by
concatenating the media type and the MAC address of the client. Refer to the
"Address Resolution Protocol Parameters" section of RFC 1700, Assigned
Numbers, for a list of media type codes.
......for example, 01b7.0813.8811.66, where 01 represents the Ethernet media
type.
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