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 floodi ng 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 p erformance 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 desti na tio n add re s s
packets. If the cutoff rate is exceeded, fur the r pa ck ets o f the s e type s ar e
dropped. This capability helps to alleviate broadcast storms, a problem
often encountered i n Ethernet networks. Broadcast throttlin g is
configurable in the S w itch Configuration m en u of the console menus o r
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 the y can co mmunicat e using
the TCP/IP protocol suite. The ELS100-24TX switch uses BootP and
DHCP to automatically configure IP address inform ation wit hout requi ring
access to the console menus. BootP/DHCP ope ration is configurable
using the BootP/DHCP Enable option in the Sys tem Configuration Menu
of the console menus or via SNMP.
LEDs
The switch port LED s provide a quick and a ccurate display of t he 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 s witch front pa nel.
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 throug hpu t o f
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.