Gratuitous Address Resolution Protocol Protection; Procedure 21; Checking Ethernet Statistics - Nortel 2033 Installation And Operation Manual

Gratuitous Address Resolution Protocol Protection

5 When the Speed option appears, select one of the following:
• 0 for 10 Mbps
• 1 for 100 Mbps (default)
6 Select OK to confirm the change.
7 Restart the IP Phone 2004. The firmware settings are read and are
applied to UPLINK and the PC Ethernet Port.
When the IP Phone is restarted, the firmware reads the setting for Full Duplex
mode and sets the LAN Ethernet port, PC Ethernet port, duplex, and speed
accordingly.
Use Procedure 21to confirm activation of Full Duplex mode.

Procedure 21

Checking Ethernet Statistics

1 Double-click the Services key. The Network Diagnostics menu appears.
2 Select Ethernet Statistics.
• If Full Duplex mode is active, the following is displayed:
— Link: UP
— Duplex: Full
— Speed: 10 (Mb) or 100(Mb)
— Auto-Negotiate Capability: N
— Auto-Negotiate Completed: N
Gratuitous Address Resolution Protocol (GARP) Protection prevents the
IP Phone 2004 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,
Nortel IP Phone 2004
End of Procedure
End of Procedure
IP Phones Description, Installation, and Operation
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