Cyclades-PR2000

The Local Management Interface (LMI) Protocol provides services not available in simple Frame Relay. It is used for controlling the connection between the user and the network. It monitors this link, maintains the list of DLCs, and sends status messages about the PVCs. A separate virtual circuit is created to pass this information (DLCI 0).

Frame Relay Menu CONFIG=>INTERFACE=><LINK>=>ENCAPSULATION =>FRAME RELAY

Parameter

Description

SNAP IP

Indicates that the Sub-Network Access Protocol should be used. The router on the sending

 

end must be using the same header type (NLPID or SNAP) as the router on the receiving end.

 

See the CyROS Reference Guide for more information.

LMI

Selects the Local Management Interface specification to be used. ANSI, Group of Four

 

(defined by the vendors that first implemented Frame Relay), Q933a (defined by ITU-T), and

 

None (used for a dedicated FR connection without a network).

T391

Interval between the LMI Status Enquiry messages.

N391

Full Status Polling Counter. Full Status Enquiry messages are sent every N391-th LMI Status

 

Enquiry message.

N392

Error Threshold. The network counts how many events occur within a given period and

 

considers an interface inactive when the number of events exceeds a threshold. N393 is the

 

number of events to be considered and N392 the number of errors within this period. If N392

 

of the last N393 events are errors, the interface is deemed inactive. A successful event is the

 

receipt of a valid Status Enquiry message

N393

Monitored Events Count. See the description of N392. This value must be larger than N392.

CIR

Committed Information Rate, in percentage of total bandwidth (bandwidth defined in

 

CONFIG=>INTERFACE=>SWAN =>TRAFFIC CONTROL =>GENERAL =>BANDWIDTH).

 

Traffic above this rate may be discarded if the network is congested.

Bandwidth

Enables traffic control per DLCI. Traffic control options appear in the Add DLCI Menu.

Reservation

 

Chapter 8 - Data-Link Protocols (Encapsulation)

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Avocent Cyclades-PR2000 installation manual T391 Interval between the LMI Status Enquiry messages N391