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Glossary
545
CLI L2P
Release 7.0 05/2011
8 Glossary
Numerics
802.1D.
The IEEE designator for
Spanning Tree Protocol (STP). STP,
a link management protocol, is part
of the 802.1D standard for media
access control bridges. Using the
spanning tree algorithm, STP
provides path redundancy while
preventing endless loops in a
network. An endless loop is created
by multiple active paths between
stations where there are alternate
routes between hosts. To establish
path redundancy, STP creates a
logical tree that spans all of the
switches in an extended network,
forcing redundant paths into a
standby, or blocked, state. STP
allows only one active path at a time
between any two network devices
(this prevents the loops) but
establishes the redundant links as a
backup if the initial link should fail. If
STP costs change, or if one network
segment in the STP becomes
unreachable, the spanning tree
algorithm reconfigures the spanning
tree topology and reestablishes the
link by activating the standby path.
Without spanning tree in place, it is
possible that both connections may
be simultaneously live, which could
result in an endless loop of traffic on
the LAN.
802.1P.
The IEEE protocol
designator for Local Area Network
(LAN). This Layer 2 network
standard improves support of time
critical traffic, and limits the extent of
high bandwidth multicast traffic
within a bridged LAN. To do this,
802.1P defines a methodology for
introducing traffic class priorities.
The 802.1P standard allows priority
to be defined in all 802 MAC
protocols (Ethernet, Token Bus,
Token Ring), as well as in FDDI. For
protocols (such as Ethernet) that do
not contain a priority field, 802.1P
specifies a method for indicating
frame priority based on the new
fields defined in the 802.1Q (VLAN)
standard.
802.1Q VLAN.
The IEEE protocol
designator for Virtual Local Area
Network (VLAN). This standard
provides VLAN identification and
quality of service (QoS) levels. Four
bytes are added to an Ethernet
frame to allow eight priority levels
(QoS) and to identify up to 4096
VLANs. See “VLAN” on page 558 for
more information.
A
Address Resolution Protocol.
An
Internet Protocol that dynamically
maps Internet addresses to physical
(hardware) addresses on a LAN.
Содержание MACH 1000
Страница 19: ...Content CLI L2P Release 7 0 05 2011 19 8 Glossary 545 9 Index 563 10 Further support 573...
Страница 20: ...Content 20 CLI L2P Release 7 0 05 2011...
Страница 32: ...Command Structure 32 1 1 Format CLI L2P Release 7 0 05 2011...
Страница 40: ...Quick Start up 40 2 2 System Info and System Setup CLI L2P Release 7 0 05 2011...
Страница 48: ...Mode based CLI 48 3 4 No Form of a Command CLI L2P Release 7 0 05 2011...
Страница 170: ...CLI Commands Base 170 4 8 Scripting Commands CLI L2P Release 7 0 05 2011...
Страница 278: ...278 4 10 User Account Management Commands CLI L2P Release 7 0 05 2011...
Страница 304: ...304 4 11 System Utilities CLI L2P Release 7 0 05 2011...
Страница 350: ...350 4 13 SNTP Simple Network Time Protocol CLI L2P Release 7 0 05 2011...
Страница 374: ...374 4 14 PTP Precision Time Protocol CLI L2P Release 7 0 05 2011...
Страница 378: ...378 4 15 PoE Power over Ethernet CLI L2P Release 7 0 05 2011...
Страница 382: ...382 4 16 PoE Power over Ethernet Plus CLI L2P Release 7 0 05 2011...
Страница 392: ...392 4 17 Port monitor CLI L2P Release 7 0 05 2011...
Страница 394: ...CLI Commands Switching 394 CLI L2P Release 7 0 05 2011...
Страница 446: ...CLI Commands Switching 446 5 3 HIPER Ring CLI L2P Release 7 0 05 2011...
Страница 452: ...CLI Commands Switching 452 5 4 Fast HIPER Ring CLI L2P Release 7 0 05 2011...
Страница 460: ...CLI Commands Switching 460 5 5 Redundant Coupling CLI L2P Release 7 0 05 2011...
Страница 470: ...CLI Commands Switching 470 5 7 DHCP Relay Commands CLI L2P Release 7 0 05 2011...
Страница 482: ...CLI Commands Switching 482 5 8 DHCP Server Commands CLI L2P Release 7 0 05 2011...
Страница 492: ...CLI Commands Security 492 CLI L2P Release 7 0 05 2011...
Страница 542: ...Appendix VLAN Example 542 7 1 SOLUTION 1 CLI L2P Release 7 0 05 2011...
Страница 544: ...Appendix VLAN Example 544 7 2 SOLUTION 2 CLI L2P Release 7 0 05 2011...
Страница 560: ...Glossary 560 CLI L2P Release 7 0 05 2011...
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Страница 570: ...Index 572 CLI L2P Release 7 0 05 2011...
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