Cabletron Systems SmartSTACK ELS100 - Manual (Page 23)

9032579-03 Product Overview 9
ELS100-24TX switch automatically adjusts to the network device’s
communication settings. Auto-negotiation is configurable in the Port
Configuration Menu of the console menus or via SNMP.
Broadcast Throttling
The ELS100-24TX has the capability to throttle (or limit) the flooding of
packets through the switch. Broadcast, multicast, and unknown
destination address unicast packets received by the switch are typically
flooded to all ports on the switch or on a given VLAN. When the number
of these types of packets being forwarded is large, the performance of the
switch in forwarding packets of other types may suffer. A programmable
broadcast cutoff rate parameter allows a rate threshold to be set in the
switch for the forwarding of broadcast and unknown destination address
packets. If the cutoff rate is exceeded, further packets of these types are
dropped. This capability helps to alleviate broadcast storms, a problem
often encountered in Ethernet networks. Broadcast throttling is
configurable in the Switch Configuration menu of the console menus or
via SNMP.
BootP/DHCP
The Bootstrap Protocol (BootP) and the Dynamic Host Configuration
Protocol (DHCP) provide for the capability of passing configuration
information to hosts on a TCP/IP network. Using this process, network
devices do not need to be configured before they can communicate using
the TCP/IP protocol suite. The ELS100-24TX switch uses BootP and
DHCP to automatically configure IP address information without requiring
access to the console menus. BootP/DHCP operation is configurable
using the BootP/DHCP Enable option in the System Configuration Menu
of the console menus or via SNMP.
LEDs
The switch port LEDs provide a quick and accurate display of the integrity
of switch connections and switch mode. The operation of the port LEDs
can be changed by use of the LED mode button on the switch front panel.
The default operation of the LEDs indicates Link (L) and Activity (A) for
each of the ports. When the LED mode button is pressed (pressed and
held in), the operation of the LEDs changes to indicate 10/100 Mbps
speed and full/half duplex operation, respectively.
Full Duplex Mode
The full duplex mode of operation on a port can double the throughput of
switch connections. This mode disables the collision detection portion of
the Ethernet Carrier Sense Multiple Access with Collision Detection
(CSMA/CD) protocol, allowing for two-way traffic. Full duplex is
configurable using the Duplex Mode parameter in the Port Menu of the
console menus or via SNMP.