Enterasys Networks CSX7000 Manuel d'utilisateur télécharger pdf (Page 258)

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USER’S GUIDE

258 CyberSWITCH

have a per packet charge, therefore, the administrator should be cautious when enabling this

feature.

LMI

Indicates whether or not this frame relay access will support the Local Management Interface

(LMI). If this frame relay access supports LMI, LMI information can be displayed by entering the

fr lmi

command at the system console prompt. For further LMI information, refer to the Local

Management Interface Overview.

LMI F

ORMAT

The LMI format used by this frame relay access. Available formats include ANSI, and CCITT. The

recommended LMI format is CCITT. If this format is unavailable, use ANSI.

CLLM M

ESSAGES

Indicates whether or not this frame relay access will support Consolidated Link Layer Management

(CLLM) messages. CLLM is recommended for systems in Japan. CLLM must be requested from

your carrier service. The CLLM message is based on the standard Layer 2 XID frame used for the

exchange of functional information. If this frame relay access supports CLLM messages, any of

these messages that are sent across the network will be included in the system log messages. To

access the system log message, enter the

command at the system console prompt.

INK INTEGRITY VERIFICATION TIMER VALUE

The number of seconds between sending STATUS_ENQUIRY messages. This parameter is a

component of the LMI.

ULL STATUS ENQUIRY POLLING COUNT

The number of intervals to elapse before sending a full report STATUS_ENQUIRY message. The

length of each interval is equal to the value of the configured Link Integrity Verification Timer. This

parameter is a component of the LMI.

RROR THRESHOLD COUNT

The number of errors in the last “n” events required to declare an alarm. When an alarm is declared,

a system message will be logged stating that the alarm is now on. To access system log messages,

enter the

command at the system console prompt. The number of events (“n”) is equal to the

value of the configured Full Status Enquiry Polling Count. This parameter is a component of the

LMI.

ONITORED EVENTS COUNT

The number of consecutive correct events required to reset an alarm. This parameter is a

component of the LMI.

FRAME RELAY PVC CONFIGURATION ELEMENTS

Once the above frame relay parameters have been configured, the associated PVCs should be

configured. A frame relay access may have multiple PVCs, within this limit: the aggregate

bandwidth of all associated PVCs cannot exceed the bandwidth of the frame relay access.

DLCI V

ALUE

Each data frame to be transmitted by an endpoint is identified by a Data Link Connection Identifier

(DLCI). The DLCI is supplied by the service provider at subscription time. It is a unique identifier

for that PVC. The DLCI identifies a pre-established path, or permanent virtual circuit, within the

access line to the frame relay network. The frame relay switch at the edge of the frame relay

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Enterasys Networks CSX7000 Manuel d'utilisateur Page 258

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