Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 2210)

Appendix B: Glossary
Software Reference for x310 Series Switches
B.20 AlliedWare Plus TM Operating System - Version 5.4.4C C613-50046-01 REV A
Policy maps
Policy maps are the means by which you apply your Class maps to physical switch ports. A
policy map can be assigned to several ports, but a port cannot have more than one policy
map assigned to it. See
QoS .
For more information see “Policy Maps” on page 38.11 .
Port bit map
An efficient method for the storage of a list of ports. Each port is represented by a single
bit in a 32-bit or 64-bit value.
Port mirroring
Port mirroring enables traffic being received and transmitted on a switch port to be sent
to another switch port, the mirror port, usually for the purposes of capturing the data with
a protocol analyzer. The mirror port is the only switch port that does not belong to a VLAN,
and therefore does not participate in any other switching. Before the mirror port can be
set, it must be removed from all trunk groups and all VLANs except the default VLAN.
PPP
Point-to-Point Protocol. A data link protocol used to establish a direct connection between
two networking nodes. PPP can provide connection authentication and transmission
encryption. PPPoE (Point-to-Point Protocol over Ethernet) is used over broadband
connections as is PPPoA (Point-to-Point Protocol over ATM) with DSL.
Premarking
In QoS , premarking relates to adding QoS markers to your incoming data traffic before it is
metered. QoS markers can be applied at both the link layer (within the CoS field), and at
the network layer (within the DSCP field). See
Policing .
For more information see “Premarking and Remarking Your Traffic” on page 38.12 .
Primary port
In EPSR , a ring port on the master node. This port determines the direction of the traffic
flow, and is always operational.
For more information see “Ring Components and Operation” on page 57.2 .
Provisioning
Stack member provisioning is the pre-configuration of Stack member position ready for
insertion at a later time. Provisioning enables a network administrator to pre-configure
vacant stack member capacity within a
VCStack , ready to be hot-swapped in at a later
time. Later, when the stack member switch is physically added, its configuration is
automatically applied with the minimum network disruption.
For more information see “Provisioning (Stack Members)” on page 82.18 .
PSE
Power Sourcing Equipment. A device that can source power, such as an Ethernet switch, is
termed Power Sourcing Equipment. Power Sourcing Equipment can provide power, along
with data, over existing LAN cabling to Powered Devices (
PDs ). See PoE .
PSU
Power Supply Unit.