Gratuitous Address Resolution Protocol Protection; Extensible Authentication Protocol; Redeploying An Ip Phone 1120E - Nortel 1110 Fundamentals

350 Nortel IP Phone 1120E
For further information about TFTP firmware upgrade, see
Server" (page

Gratuitous Address Resolution Protocol Protection

Gratuitous Address Resolution Protocol (GARP) Protection protects the IP
Phone 1120E 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 machine. This allows the
malicious device to launch a variety of attacks on the network, that results
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 machine flows through the malicious
device.
To enable GARP Protection during configuration, see
"Installing the IP Phone 1120E" (page

Extensible Authentication Protocol

Extensible Authentication Protocol (EAP) is a general protocol that fulfills
the protocol requirements defined by 802.1x. For further information about
802.1x, see
469).

Redeploying an IP Phone 1120E

You can redeploy an existing previously configured IP Phone 1120E on the
same Call Server. For example, the IP Phone 1120E 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 1120E. For further information, see
Converging the Data Network with VoIP Fundamentals (NN43001-260).
Procedure 70
Changing the TN of an existing IP Phone 1120E
Step
1
2
Copyright © 2003–2007, Nortel Networks
.
547).
Appendix "802.1x Port-based network access control" (page
Action
Repower the IP Phone 1120E.
During the reboot sequence of a previously configured IP Phone, the
IP Phone 1120E displays the existing node number for approximately
5 seconds.
If the node password is enabled and NULL, choose one of the
following
a. Disable the password.
b. Set the password as non-NULL.
Nortel Communication Server 1000
IP Phones Fundamentals
NN43001-368 02.01 Standard
Release 5.0 7 December 2007
Appendix "TFTP
Procedure 66
339).