386 Nortel IP Phone 1140EFor further information about TFTP firmware upgrade, see Appendix "TFTPServer" (page 547).Gratuitous Address Resolution Protocol ProtectionGratuitous Address Resolution Protocol (GARP) Protection protects the IPPhone 1140E from GARP Spoof attacks on the network. In a GARP Spoofattack, a malicious device on the network takes over an IP address (usuallythe default gateway) by sending unsolicited (or Gratuitous) ARP messages,thus manipulating the ARP table of the victim machine. The maliciousdevice launches a variety of attacks on the network, that results in undesiredtraffic routing. For example, a GARP attack can convince the victim machinethat the malicious device is the default gateway. In this scenario, all trafficfrom the victim machine flows through the malicious device.To enable GARP Protection during configuration, see Procedure 74"Installing the IP Phone 1140E" (page 375).Extensible Authentication ProtocolExtensible Authentication Protocol (EAP) is a general protocol that fulfillsthe protocol requirements defined by 802.1x. For further information about802.1x, see Appendix "802.1x Port-based network access control" (page469).Bluetooth wireless technologyThe IP Phone 1140E supports Bluetooth wireless technology. Forinformation about configuring Bluetooth wireless technology on the IPPhone 1140E, see Appendix "Bluetooth wireless technology" (page 531).Redeploying an IP Phone 1140EYou can redeploy an existing previously configured IP Phone 1140E on thesame Call Server. For example, the IP Phone 1140E can be assigned toa new user (new TN) or to an existing user who moved to a new subnetby changing the TN of the IP Phone 1140E. For further information, seeConverging the Data Network with VoIP Fundamentals (NN43001-260).Procedure 77Changing the TN of an existing IP Phone 1140EStep Action1 Repower the IP Phone 1140E.During the reboot sequence of a previously configured IP Phone, theIP Phone 1140E displays the existing node number for approximatelyfive seconds.Nortel Communication Server 1000IP Phones FundamentalsNN43001-368 02.01 StandardRelease 5.0 7 December 2007Copyright © 2003–2007, Nortel Networks.
