Using The Simple Network Time Protocol; Configuring And Using Sntp - Extreme Networks 200 Series Installation And User Manual

Managing the Switch
authenticating server. The encapsulating mechanism used for communication between the supplicant
and the authenticator is referred to as EAP Over LANs, or EAPOL.
By default (per IEEE 802.1D), Summit 200 series switches do not forward EAPOL frames. Also, if
network login is enabled, EAPOL flooding cannot be enabled. However, under certain conditions, you
might opt to change this behavior to support an upstream central authenticator by enabling the switch
to flood the EAPOL frame on the VLAN associated with the ingress port.
The following example enables EAPOL frame flooding on a Summit 200 series switch that does not
have Network login enabled:
enable eapol-flooding
When EAPOL flooding is enabled on the switch, you can verify that status by using the command:
show config
The following example disables EAPOL frame flooding on a Summit 200 series switch:
disable eapol-flooding
You can verify the current EAPOL flooding state by using the command:
show eapol-flooding
Table 24 describes the commands used to configure EAPOL flooding.
Table 24: EAPOL Flooding Configuration Commands
Command
disable eapol-flooding
enable eapol-flooding
show eapol-flooding

Using the Simple Network Time Protocol

ExtremeWare supports the client portion of the Simple Network Time Protocol (SNTP) Version 3 based
on RFC1769. SNTP can be used by the switch to update and synchronize its internal clock from a
Simple Network Time Protocol server. When enabled, the switch sends out a periodic query to the
indicated SNTP server, or the switch listens to broadcast SNTP updates. In addition, the switch supports
the configured setting for Greenwich Mean time (GMT) offset and the use of Daylight Savings Time.
These features have been tested for year 2000 compliance.

Configuring and Using SNTP

To use SNTP, follow these steps:
1 Identify the host(s) that are configured as SNTP server(s). Additionally, identify the preferred
method for obtaining SNTP updates. The options are for the SNTP server to send out broadcasts, or
82
Description
Disables EAPOL flooding on the switch.
Enables EAPOL flooding on the switch.
Enables network login on a specified port in a VLAN.
Summit 200 Series Switch Installation and User Guide