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ng_frame_relay.4freebsd

Langue: en

Version: 300692 (debian - 07/07/09)

Section: 4 (Pilotes et protocoles réseau)


BSD mandoc

NAME

ng_frame_relay - frame relay netgraph node type

SYNOPSIS

In 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.
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