Instruction manual

ConneXium Ethernet Switches: 499NMS25101, 499NSS25101, 499NMS25102, 499NSS25102

31006003 01 July 2004

Features

Switching Store and Forward

All data received by the ConneXium switches from all ports are stored and checked

for validity. The switches discard the invalid and defective frames (frames greater

than 1536 bytes or with CRC errors) and frame fragments (less than 64 bytes). The

switches forward valid frames.

Multi-Address Capability

The switches learn source addresses on a per-port basis. Only packets with these

addresses in the destination address field are sent to the ports:

unknown addresses

addresses learned at the specific port

multicast and broadcast address

A switch can learn up to 1000 addresses. This becomes necessary if more than one

terminal device is connected to one or more ports. Multi-address switching allows

several independent subnetworks to be connected to a ConneXium switch.

The switches monitor the age of the learned addresses and delete entries from the

address table that exceed a certain age (300 s).

Tagging

Data packets with VLAN tags are transmitted unchanged by the switches

(IEEE 802.1 Q).

Note: Restarting deletes the learned address entries.