— frame relay netgraph
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_lmi(4)
hook should be connected to the
synchronous line, i.e., the switch. Then hooks
available to connect to each of the DLCI channels.
This node type supports the following hooks:
- The connection to the synchronous line.
- Here X is a decimal number from 0 to 1023. This hook
corresponds to the DLCI X frame relay virtual channel.
This node type supports only the generic control messages.
This node shuts down upon receipt of a
control message, or when all hooks have been disconnected.
node type was implemented in
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
. Instead, it should query the LMI node