User's Manual

200 Nortel IP Phone 2007
7 Tap the Apply&Reset soft key to save the changes and to
restart the IP Phone. The firmware settings are read and are
applied to UPLINK and the PC Ethernet Port.
--End--
When the IP Phone restarts, the firmware reads the setting for Full Duplex
mode and sets the LAN Ethernet port, PC Ethernet port, duplex, and
speed accordingly.
Use Procedure 39 “Checking Ethernet Statistics” (page 200) to confirm
activation of Full Duplex mode.
Procedure 39
Checking Ethernet Statistics
Step Action
1 Tap the Tools icon.
2 Tap the Local Diagnostics soft key.
3 Tap the Ethernet Statistics soft key.
The following statistics are displayed:
• Link: Up
• Duplex: Full
•
Speed: 10 (Mb) or 100 (Mb)
•
Auto-Negotiate Capability: N
• Auto-Negotiate Completed: N
--End--
Gratuitous Address Resolution Protocol Protection
Gratuitous Address Resolution Protocol (GARP) Protection prevents the
IP Phone 2007 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.
Nortel Communication Server 1000
IP Phones Fundamentals
NN43001-368 02.07
5 February 2009
Copyright © 2003-2009 Nortel Networks
.