ZyXEL Communications SAM1316-22, User Manual

Page: 402 / 464

Chapter 60 Virtual Channel Management
SAM1316-22 User’s Guide
402
where
This command creates a virtual channel profile. After you create a virtual channel
profile, you can assign it to any of the DSL ports in the SAM1316-22.
The following example creates a virtual channel profile named gold that uses LLC
encapsulation. It uses constant bit rate and has the maximum rate (peak cell rate)
set to 300,000 cells per second. The acceptable tolerance of the difference
between a cell’s transfer delay and the expected transfer delay (CDVT) is set to 5
cells.
The following example creates a virtual channel profile named silver that uses VC
encapsulation. It uses real-time variable bit rate and has the maximum rate (peak
cell rate) set to 250,000 cells per second. The acceptable tolerance of the
difference between a cell’s transfer delay and the expected transfer delay (CDVT)
is set to 5 cells. The average cell rate that can be transmitted (SCR) is set to
<vcprofile> =
The name of the virtual channel profile (up to 31 ASCII
characters). You cannot change the name of the
DEFVAL or DEFVAL_VC profiles.
<vc|llc> =
The type of encapsulation (vc or llc).
<ubr|cbr> =
The ubr (unspecified bit rate) or cbr (constant bit rate)
or ATM traffic class.
<pcr> =
Peak Cell Rate (150 to 300000), the maximum rate
(cells per second) at which the sender can send cells.
[cdvt] =
Cell Delay Variation Tolerance is the accepted tolerance
of the difference between a cell’s transfer delay and the
expected transfer delay (number of cells). 0 to 255 cells
or * (means 0).
<vbr(rt-
vbr)|nrt-vbr>
=
The real-time (vbr) or non real-time (nrt-vbr) Variable
Bit Rate ATM traffic class.
<scr> =
The Sustained Cell Rate sets the average cell rate (long-
term) that can be transmitted (cells per second). SCR
applies with the vbr traffic class.
<bt> =
Burst Tolerance this is the maximum number of cells
that the port is guaranteed to handle without any
discards (number of cells). BT applies with the vbr
traffic class.
Figure 236 Set Virtual Channel Profile Command Example 1
ras> shdsl vcprofile set gold llc cbr 300000 5