Extreme Networks Altitude 3500 Series, Product Reference Manual

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System Configuration
Altitude 3500 Series Access Point Product Reference Guide
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5 If using an NTP server to supply system time to the access point, configure the NTP Server
Configuration field to define the server network address information required to acquire the AP35xx
network time.
6 Click Apply to save any changes to the Date and time Settings screen. Navigating away from the
screen without clicking the Apply button results in all changes to the screen being lost.
7 Click Undo Changes (if necessary) to undo any changes made. Undo Changes reverts the settings
displayed on Date and Time Settings screen to the last saved configuration.
8 Click Logout to securely exit the AP35xx Access Point applet. A prompt displays confirming the
logout before the applet is closed.
Configuring LLDP Settings
Link Layer Discovery Protocol (LLDP) is a Layer 2 protocol (IEEE standard 802.1AB) used to determine the
capabilities of devices such as repeaters, bridges, access points, routers and wireless clients. LLDP
enables devices to advertise their capabilities and media-specific configurations. LLDP provides a
method of discovering and representing the physical network connections of a given network
management domain. The LLDP neighbor discovery protocol allows you to discover and maintain
accurate network topologies in a multi-vendor environment.
The information is in a Type Length Value (TLV) format for each data item. TLV information is
transmitted in a LLDP protocol data unit (LLDPDU), enclosed in an Ethernet frame and sent to a
destination MAC address. Certain TLVs are mandatory, and always sent once LLDP is enabled, while
other TLVs are optionally configured. LLDP defines a set of common advertisement messages, a
protocol for transmitting the advertisements and a method for storing information in received
advertisements. A switch can receive and record the TLVs, but not transmit them. The information
distributed using LLDP is stored by its recipients in a standard MIB, making it possible for the
information to be accessed by a NMS using a management protocol such as SNMP.
Enable NTP on
AP35xx Select the Enable NTP on AP35xx checkbox to allow a
connection between the AP35xx and one or more specified
NTP servers. A preferred, first alternate and second
alternate NTP server cannot be defined unless this
checkbox is selected.
Disable this option (uncheck the checkbox) if Kerberos is
not in use and time synchronization is not necessary.
Preferred Time
Server Specify the numerical (non DNS name) IP address and
port of the primary NTP server. The default port is 123.
First Alternate Time
Server Optionally, specify the numerical (non DNS name) IP
address and port of an alternative NTP server to use for
time synchronization if the primary NTP server goes down.
Second Alternate
Time Server Optionally, specify the numerical (non DNS name) and port
of yet another NTP server for the greatest assurance of
uninterrupted time synchronization.
Synchronization
Interval Define an interval in minutes the AP35xx uses to
synchronize its system time with the NTP server. A
synchronization interval value from 15 minutes to 65535
minutes can be specified. For implementations using
Kerberos, a synchronization interval of 15 minutes (default
interval) or sooner is recommended.