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7-47
Command Sets for Command Line Interface
driver. Normal limits are 0 only for port, 0 only for VPI, 1..1023 for
VCI. If a single argument
none is supplied, any current connection is
torn down. This is equivalent to
svc none on the channel. In the PPP
state machine, providing a link of this form causes the link to be ‘up’.
Note that
enable must also be used, to allow the link to become
operational. The
ip or mac indicates which form of data is transported
over the connection: one of IP data (controlled by the IPCP protocol),
or MAC data (for BCP). If neither is provided,
ip is assumed. If the
channel is not linked to an interface, and the channel is for IP data, the
channel is linked to interface 1. If the channel is not linked to an
interface, and the channel is for MAC data, the channel is linked to
interface 2. Providing a PVC setting unsets any SVC setting. See the
svc command. It is possible for a PVC to become ‘down’ in the PPP
state machine even though the PVC is still there, for instance due to
an authentication failure. If in this state, an incoming packet will
cause the PPP state machine to go ‘up’. If
listen is specified then this is
the server end of a PVC. It will not send out PPP Configure Requests
until it first receives a packet over the PVC. When a connection is torn
down it goes returns to this state. Use the
info command to read this
information.
Configuration saving saves this information. By default a channel has
no connection information.
Example:
> ppp 3 pvc 3 32 ;set channel 3 to be (VPI=3,VCI=32)
> ppp 4 pvc ;read PVC settings for channel 4
> ppp 5 pvc 0 ;remove any PVC settings from
channel 5
16. <channel> qos
Syntax:
<channel> qos [cbr|ubr] [pcr <pcr-tx> [<pcr-rx>]]
Description:
Specify that the VC for a PPP channel should be Constant Bit Rate or
Unspecified Bit Rate, and (optionally for UBR) give a Peak Cell Rate
for the connection. If two values are specified then they are transmit
and receive PCRs respectively. If called while not attached to a VC
then the settings are saved for use when a VC is created. If the
channel is already attached to a VC then it is closed, and re-opened
with the new values. If it cannot be reopened, it remains closed.
Configuration saving saves this information. By default channels are