Nortel 1110 Installation And Operation Manual page 342

Page 342 of 630
TFTP firmware upgrade
Gratuitous Address Resolution Protocol Protection
Extensible Authentication Protocol
553-3001-368 Standard 26.00
Nortel IP Phone 1110
— Auto-Negotiate Capability: N
— 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 page 521.
August 2007
End of Procedure
page 605.