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Chapter 53 Virtual Channel Management Commands
IES-612-51A User’s Guide
376
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 on the IES-612-51A.
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 100,000 cells per second. The maximum number of
cells that the port is guaranteed to handle without any discards (BT) is set to 200.
<vcprofile> =
The name of the virtual channel profile (up to 31 ASCII
characters). You cannot change 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 258 Set Virtual Channel Profile Command Example 1
ras> adsl vcprofile set gold llc cbr 300000 5
Figure 259 Set Virtual Channel Profile Command Example 2
ras> adsl vcprofile set silver vc vbr 250000 5 100000 200