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DES-1218/DES-1226 10/100/1000 Mbps Ethernet Switch User’s Guide
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The modules that can be installed include: the DES-122G 2 port 1000BASE-SX (SC type
connector), DES-122GL 2 port 1000BASE-LX, DES-122GB 2 port GBIC, DES-122T 2
port 1000BASE-T, and DES-122GM 2 port 1000BASE-SX (MT-RJ type connector)
modules.
This stand-alone Switch enables the network to use some of the most demanding
multimedia and imaging applications concurrently with other user applications without
creating bottlenecks. The built-in console interface can be used to configure the Switch’s
settings for Priority Queuing, VLAN, and Port Trunk Groups, Port Monitoring and Port
Speed.
Performance features
♦ IEEE802.3 compliant
♦ IEEE802.3u compliant
♦ IEEE802.3z compliant
♦ IEEE802.3ab compliant
♦ IEEE802.1p Priority Queues
♦ IEEE802.3x flow control in full duplex mode
♦ NWay Auto-negotiation
♦ Full and half-duplex for both 10Mbps and 100Mbps connections. The Gigabit
Ethernet extension module operates at full-duplex only. Full-duplex allows the
switch port to simultaneously transmit and receive data, and only works with
connections to full-duplex capable end stations and switches. Connections to a hub
must take place at half-duplex
♦ Supports single-mode and multi-mode connections
♦ Store and forward switching scheme capability to support rate adaptation and
protocol conversion
♦ Auto-polarity detection and correction of incorrect polarity on the 10/100Mbps TX
ports
♦ Data forwarding rate 14,880 pps per port at 100% of wire-speed for 10Mbps speed
♦ Data forwarding rate 148,810 pps per port at 100% of wire-speed for 100Mbps
speed
♦ Data forwarding rate 1,488,100 pps per port at 100% of wire-speed for 1000Mbps
speed
♦ Data filtering rate eliminates all error packets, runts, etc. at 14,880 pps per port at
100% of wire-speed for 10Mbps speed
♦ Data filtering rate eliminates all error packets, runts, etc. at 148,810 pps per port
at 100% of wire-speed for 100Mbps speed
♦ Data filtering rate eliminates all error packets, runts, etc. at 1,488,100 pps per
port at 100% of wire-speed for 1000Mbps speed
♦ Forwarding 64 to1536 byte frames with correct CRC checksum
♦ Layer 2 switching based on MAC address
♦ Address handling : auto-learning , auto-aging
♦ Address table : Support addresses up to 17K
♦ Buffer size: 8 Megabytes (DES-1218 ) 10 Megabytes (DES-1226)
♦ Broadcast storm control
♦ Supports 9 Port-based VLAN Groups
♦ Port Trunking
♦ Back pressure in half-duplex