Gratuitous Address Resolution Protocol Protection; Extensible Authentication Protocol; Reinstalling An Ip Phone 2002; Procedure 14 - Nortel 2001 Installation And Operation Manual

Page 90 of 430 Nortel IP Phone 2002

Gratuitous Address Resolution Protocol Protection

Extensible Authentication Protocol

Reinstalling an IP Phone 2002

553-3001-368 Standard 7.00
Gratuitous Address Resolution Protocol Protection (GARP) prevents the
IP Phone 2002 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. This allows the
malicious device to launch 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, refer to Procedure 10,
"Installing an IP Phone 2002 for the first time using manual configuration"
on page 75 or Procedure 10, "Installing an IP Phone 2002 for the first time
using DHCP" on page
Extensible Authentication Protocol (EAP) is a general protocol that fulfills
the protocol requirements defined by 802.1x. For further information on
802.1x, refer to Appendix C: "802.1x Port-based network access control" on
page 361.
You can reinstall an existing previously configured IP Phone 2002 on the
same system. For example, the IP Phone 2002 can be assigned to a new user
(new TN) or to an existing user who moved to a new subnet by changing the
TN of the IP Phone 2002.

Procedure 14

Changing the TN of an existing IP Phone 2002
1 Repower the IP Phone 2002.
Note: During the reboot sequence of a previously configured IP Phone,
the IP Phone 2002 displays the existing node number for approximately 5
seconds.
August 2005
80.