493.AppendixConfiguring DHCP to auto-configure IPPhonesThe DHCP server and the IP Phone 2002, IP Phone 2004, and IP Phone2007 can be configured so that the IP Phone automatically obtainsits configuration data from the DHCP server. This feature reduces theadministrative overhead associated with bringing a large number of IPPhones online.In addition, the DHCP server and the IP Phone can be configured so thatthe IP Phone can use the Auto VLAN Discovery feature, which allows theIP Phone to discover the Phone VLAN ID.This appendix explains how to:• configure the IP Phone to obtain its configuration data from a Windows2000 Server DHCP server• retrieve VLAN information required to take advantage of the AutoVLAN Discovery featureThis appendix is not intended to be a primer on how to set up a DHCPserver. The reader is assumed to have a working knowledge of Windows2000 Server DHCP servers. The appendix also does not describe theprocess used by the IP Phone to interact with the DHCP server or to bootitself into the Phone VLAN.ATTENTIONIt is assumed that the necessary DHCP scopes defining the range of addressesand lease duration have been created.To take advantage of the Auto VLAN Discovery feature, two VLANs arerequired: one for the phone to boot into initially, in order to communicatewith the DHCP server and learn the appropriate phone VLAN ID, and thesecond for the Phone VLAN itself.Nortel Secure Network Access SwitchUsing the Command Line InterfaceNN47230-100 03.01 Standard28 July 2008Copyright © 2007, 2008 Nortel Networks.
