Cisco Systems 9124E LPort, Latency, Link services, Loop failure, LoopID, Loop initialization

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L_Port

Loop port. A node port (NL_Port) or fabric port (FL_Port) that has arbitrated loop

 

capabilities. An L_Port can be in one of two modes:

 

Fabric mode: Connected to a port that is not loop capable and is using fabric

 

protocol.

 

Loop mode: In an arbitrated loop and using loop protocol. An L_Port in loop mode

 

can also be in participating mode or non-participating mode. See also

 

non-participating mode.

latency

The time required to transmit a frame from the time it is sent until it arrives. Together,

 

latency and bandwidth define the speed and capacity of a link or system.

link

With respect to FC, a physical connection between two ports, consisting of both

 

transmit and receive fibers.

link services

A protocol for link-related actions.

LIP

Loop initialization primitive. The signal that begins initialization in a loop. It indicates

 

either loop failure or the resetting of a node.

LM_TOV

Loop master time-out value. The minimum time that the loop master waits for a loop

 

initialization sequence to return.

loop failure

Loss of signal within a loop for any period of time; loss of synchronization for longer

 

than the time-out value.

Loop_ID

A hexadecimal value representing one of the 127 possible AL_PA values in an

 

arbitrated loop. See also AL_PA.

loop initialization

The logical procedure used by an L_Port to discover its environment. Can be used to

 

assign AL_PA addresses, detect loop failure, or reset a node. See alsoAL_PA.

LPSM

Loop port state machine. The logical entity that performs arbitrated loop protocols and

 

defines the behavior of L_Ports when they require access to an arbitrated loop. See also

 

L_Port.

LWL

Long wavelength. A type of fiber optic cabling that is based on 1300 mm lasers and

 

supports link speeds up to 2 Gb/s. May also refer to the type of transceiver. See also

 

SWL.

master port

The port that determines the routing paths for all traffic flowing through a trunking

 

group. One of the ports in the first ISL in the trunking group is designated as the master

 

port for that group. See also ISL trunking.

MIB

Management Information Base. An SNMP structure to help with device management,

 

providing configuration and device information. See also SNMP.

multicast

The transmission of data from a single source to multiple specified N_Ports (as opposed

 

to all ports on the network).

N_Port

Node port. A port on a node that can connect to an FC port or to another N_Port in a

 

point-to-point connection.

name server

A term frequently used to indicate a Simple Name Server (SNS). See also SNS.

NL_Port

Node loop port. A node port that has arbitrated loop capabilities. Used to connect an

 

equipment port to the fabric in a loop configuration through an FL_Port. See also node.

60 Glossary

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Contents Cisco MDS 9124e Fabric Switch for HP c-Class BladeSystem Legal and notice information Contents Managing the Switch Regulatory compliance and safetySwitch technical specifications Electrostatic dischargeGlossary Contents About this guide Intended audienceRelated documentation Contacting HP Technical SupportDocument conventions and symbols Document conventions Convention ElementSubscription service Other HP web sitesAbout This Guide Switch features OverviewComponent identification Port side of the Switch Switch redundancyInternal ports summary Switch licensing PortChannelOptional hardware kits Optional hardwareOverview Setup Shipping carton contentsInstallation and safety considerations Installing the SwitchInstalling multiple switches Electrical considerationsScale 2/3 = OA power verification Setting the IP address Power-on LEDsIndicators Checking LEDsResetting the IP Address OA connect interconnectConfiguring the Switch Items Required for ConfigurationConnecting to the Command Line Interface Setting the date and time Verifying Installed LicensesModifying the FC domain ID optional On Demand PortsDisabling and enabling a port Recovering the Admin Password Verifying the configurationBacking up the configuration Switchboot# dir bootflash Set Up Managing the Switch Management featuresMaintaining the Switch Installing dust covers in empty portsReplacing an SFP transceiver Replacing the Switch Installing an SFP SFP componentsPowering on and off LED indicators Front panel LED indicators during normal operationInterpreting LED activity Post and boot specifications LED patternsPort link status LED patterns LED color Boot Interpreting Post resultsManaging the Switch Regulatory compliance and safety Regulatory complianceModifications CablesLaser safety warning Laser deviceRegulatory compliance identification numbers Certification and classification informationInternational notices and statements Canadian notice avis CanadienEuropean Union notice Class a equipmentBsmi notice Japanese notice Korean notices Safety Battery replacement noticeTaiwan battery recycling notice Japanese power cord statement Waste Electrical and Electronic Equipment directiveEnglish notice Dutch noticeCzechoslovakian notice Estonian notice Finnish noticeFrench notice German noticeGreek notice Hungarian notice Italian notice Latvian noticeLithuanian notice Polish notice Portuguese noticeSlovakian notice Slovenian notice Spanish notice Swedish notice Regulatory compliance and safety How to prevent electrostatic discharge Electrostatic dischargeGrounding methods Electrostatic discharge Switch technical specifications General specificationsGeneral specifications Specification Weight and physical dimensions Switch physical dimensions DimensionEnvironmental requirements Supported SFPsSupported HBAs Environmental requirements ConditionSwitch technical specifications Glossary Directory service Enabled zoneError FCS switchFibre Channel Fill wordFLPort FrameLink services LPortLatency LinkSwitch NodeNon-participating ModeService rate Single modeSwitch port Request rateTopology TransmissionCharacter Trap SnmpGlossary Index Index Cisco MDS 9124e Fabric Switch for HP c-Class BladeSystem Index