Nortel 1110 User Guide

 Nortel IP Phone 1110

553-3001-368 Standard 26.00 August 2007

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Auto-Negotiate Capability: N

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Auto-Negotiate Completed: N

When you enter Cfg TFTP = 1 (for yes), and enter an IP address, the phone 
searches for an upgrade file on the TFTP Server. 

Note: Users of CS 1000 Release 4.5 or later do not need to enter a TFTP 
IP address.

For more information about TFTP firmware upgrade, see 
Appendix Appendix H:: “TFTP Server” on 

Gratuitous Address Resolution Protocol (GARP) Protection prevents the 
IP Phone 1110 from GARP Spoof attacks on the network. In a GARP Spoof 
attack, a malicious device on the network takes over an IP address (usually 
the default gateway) by sending unsolicited (or Gratuitous) ARP messages, 
thus manipulating the ARP table of the victim’s machine. The malicious 
device launches a variety of attacks on the network, resulting in undesired 
traffic routing. For example, a GARP attack can convince the victim machine 
that the malicious device is the default gateway. In this scenario, all traffic 
from the victim’s machine flows through the malicious device.

To enable GARP Protection during configuration, see Procedure 57, 
“Configuring the IP Phone 1110” on page 319.

Extensible Authentication Protocol (EAP) is a general protocol that fulfills 
the protocol requirements defined by 802.1x. For further information on 
802.1x, see Appendix Appendix C:: “802.1x Port-based network access 
control” on