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ng_frame_relay (4)
  • >> ng_frame_relay (4) ( FreeBSD man: Специальные файлы /dev/* )

  • BSD mandoc
     

    NAME

    
    
    ng_frame_relay
    
     - frame relay netgraph node type
    
     
    

    SYNOPSIS

       #include <netgraph/ng_frame_relay.h>
     

    DESCRIPTION

    The frame_relay node type performs encapsulation, de-encapsulation, and multiplexing of packets using the frame relay protocol. It supports up to 1024 DLCI's. The LMI protocol is handled by a separate node type (see ng_lmi4).

    The downstream hook should be connected to the synchronous line, i.e., the switch. Then hooks dlci0 dlci1 through dlci1023 are available to connect to each of the DLCI channels.  

    HOOKS

    This node type supports the following hooks:

    downstream
    The connection to the synchronous line.
    dlciX
    Here X is a decimal number from 0 to 1023. This hook corresponds to the DLCI X frame relay virtual channel.

     

    CONTROL MESSAGES

    This node type supports only the generic control messages.  

    SHUTDOWN

    This node shuts down upon receipt of a NGM_SHUTDOWN control message, or when all hooks have been disconnected.  

    SEE ALSO

    netgraph(4), ng_lmi4, ngctl(8)  

    HISTORY

    The node type was implemented in Fx 4.0 .  

    AUTHORS

    An Julian Elischer Aq julian@FreeBSD.org  

    BUGS

    Technically, frames on DLCI X should not be transmitted to the switch until the LMI protocol entity on both ends has configured DLCI X as active. The node type ignores this restriction, and will always pass data received on a DLCI hook to downstream Instead, it should query the LMI node first.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    HOOKS
    CONTROL MESSAGES
    SHUTDOWN
    SEE ALSO
    HISTORY
    AUTHORS
    BUGS


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