9032947 Product Overview 9
connected to the swit ch supports auto-nego tiation as the ELS100 -24TXG
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 ELS100-24TXG 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 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 throttl i ng is
configurable in the S w itch Configuration m enu of the console menu s 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 the y can co mmunicat e using
the TCP/IP protocol suite. The ELS100-24TXG 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 configurab le
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 the integrity
of switch connections and po rt m ode. Th e defa ult opera tion of th e 10/1 00
LEDs indicates Link (L) and Activity (A) for each of the ports. The
operation of these LEDs can be changed by us e of the LED mode but ton
on the switch front panel. When the LED mode button is pressed (p ressed
and held in), the operation of the 10/100 LEDs chang es to indicate 10/1 00
Mbps speed and full/half duplex operation, respectively. The Gigabit
Ethernet port LEDs indicate Link (L) and Act ivity ( A) for each of the p orts.
The Gigabit Ethernet port LEDs are not aff ected by the LED mode b utton.
Full Duplex Mode
The full duplex mode of operation on a port can double the throug hpu t of
switch connections. This mode disables the collision detection portion of
the Ethernet Carrier Sense Multiple Access with Collision Detection