Simple Network Time Protocol; Logon Authentication Protocols; Port Security - Nortel BES50GE-12T PWR User Manual

Voice VLAN mode
Manual Mode

Simple Network Time Protocol

Simple Network Time Protocol (SNTP) allows the switch to set its internal
clock based on periodic updates from a time server (SNTP or NTP).
Maintaining an accurate time on the switch enables the system log to record
meaningful dates and times for event entries. If the clock is not set, the
switch only records the time from the factory default set at the last bootup.
When the SNTP client is enabled, the switch periodically sends a request
for a time update to a configured time server. You can configure up to three
time server IP addresses. The switch attempts to poll each server in the
configured sequence.

Logon authentication protocols

Remote Authentication Dial-in User Service (RADIUS) is a logon
authentication protocol that uses software running on a central server to
control access to RADIUS-aware devices on the network. An authentication
server contains a database of multiple user name and password pairs with
associated privilege levels for each user that requires management access
to the switch.
RADIUS uses UDP to offer best effort delivery. Also, RADIUS encrypts only
the password in the access-request packet from the client to the server.

Port security

Port security is a feature that allows you to configure a switch port with one
or more device MAC addresses that are authorized to access the network
through that port.
When port security is enabled on a port, the switch stops learning new MAC
addresses on the specified port when it reaches a configured maximum
number. Only incoming traffic with source addresses already stored in the
dynamic or static address table are accepted as authorized to access the
Copyright © 2006, Nortel Networks
.
Type of IP Phone
Tagged IP Phone
Untagged IP Phone
SMB
Using the Nortel Business Ethernet Switch 50 Series
NN47924-301 01.01 Standard
1.00 October 2006
Port mode
Access: Not supported
Trunk: Supported, but the default VLAN of the
connected port must exist and cannot be the
voice VLAN. The default VLAN is allowed to
pass the connected port.
Hybrid: Supported, but the default VLAN of the
connected port must exist and must be in the
tagged VLAN list that is allowed to pass the
connected port.
Access: Supported, but the default VLAN of the
connected port must be the voice VLAN.
Port security 151
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