User's Manual

Redeploying an IP Phone 2002 89

— Auto-Negotiate Capability: N

— Auto-Negotiate Completed: N

--End--

Gratuitous Address Resolution Protocol Protection

Gratuitous Address Resolution Protocol (GARP) Protection 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 machine. The

malicious device launches 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 Procedure 11

“Installing the IP Phone 2002 using manual configuration” (page 73) or

Procedure 12 “Installing an IP Phone 2002 using DHCP” (page 80).

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 “802.1x Port-based network access control” (page 479).

Redeploying an IP Phone 2002

You can redeploy an existing previously configured IP Phone 2002 on the

same Call Server. 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. For further information, see

Converging the Data Network with VoIP Fundamentals (NN43001-260).

Procedure 15

Changing the TN of an existing IP Phone 2002

Step Action

1 Repower the IP Phone 2002.

During the reboot sequence of a previously configured IP

Phone, the IP Phone 2002 displays the existing node number

for approximately 5 seconds.

2 If the node password is enabled and NULL, choose one of the

following:

Nortel Communication Server 1000

IP Phones Fundamentals

NN43001-368 02.07

5 February 2009