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Extensible Authentication Protocol 397

If Full Duplex mode is active, the following is displayed

• Link Status: UP

• Duplex Mode: Full

•

Network Speed: 10 MB, 100 MB, or 1 G

• Auto Sense/Negotiate

— Auto-Negotiate Capability: No

— Auto-Negotiate Completed: No

--End--

TFTP ﬁrmware upgrade

When you enter Cfg TFTP = 1 (for yes), and enter an IP address, the IP

Phone searches for an upgrade file on the TFTP Server.

Users of CS 1000 Release 4.5, or later do not need to enter a TFTP IP

address.

For further information about TFTP firmware upgrade, see “TFTP Server”

(page 557).

Gratuitous Address Resolution Protocol Protection

Gratuitous Address Resolution Protocol (GARP) Protection protects the

IP Phone 1140E 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 91

“Installing the IP Phone 1140E” (page 387).

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).

Nortel Communication Server 1000

IP Phones Fundamentals

NN43001-368 02.07

5 February 2009