Glossary - Siemens SCALANCE X-300 Manual

Glossary

Aging time
The aging time is the time after which a learned MAC address is discarded if an IE Switch X-
300 has not received frames with this sender address during this time.
ARD
Automatic Redundancy Detection
→
Autocrossover
Technique with which a TP port is automatically switched over between MDI and MDIX
assignment to make a connection independent of the port assignment of the device being
attached. This means that crossover cables are not required. The autocrossover function
can only be used when the port is set to autonegotiation mode.
Automatic Redundancy Detection
Automatic Redundancy Detection.
Autonegotiation
Procedure standardized by IEEE 802.3 in which the transmission parameters (for example
10/100 Mbps, full/half duplex) are negotiated automatically between the devices.
BFOC
A BFOC connector corresponds to an SC connector.
BOOTP
A protocol for automatic assignment of IP addresses. The IP addresses are provided by a
BOOTP server.
CLI
Command Line Interface. Terminal-based configuration option for the IE Switch X-300. With
TELNET, the CLI can be used over every Ethernet port.
Collision domain
To ensure that the CSMA/CD protocol functions correctly, the propagation time of a data
packet from one node to another is restricted. This propagation time results in a spatially
limited span for the network depending on the data rate known as the collision domain.
SCALANCE X-300
Operating Instructions, 10/2010, A5E01113043-10
281