ZyXEL Communications IES-1248-51A, Руководство пользователя

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Chapter 66 Virtual Channel Commands
IES-1248-51V User’s Guide
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66.2.1 Set Virtual Channel Profile Command
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
adsl vcprofile set
< vcprofile >
<vc|llc><vbr(rt-
vbr)|nrt-vbr>
<pcr><cdvt><scr><bt>
Creates a virtual channel profile. After you create a virtual channel
profile, you can assign it to any of the ADSL ports on any of the
ADSL IES-1248-51V in the IES-1248-51V.
vbr(rt-vbr)|nrt-vbr:
The Real-Time Variable Bit Rate (RT-VBR)
or Non Real-Time (NRT-VBR) Variable Bit Rate ATM traffic class.
pcr:
Peak Cell Rate (PCR) is the maximum rate (150 to 300000
cells per second) at which the sender can send cells.
cdvt:
Cell Delay Variation Tolerance (CDVT) is the accepted
tolerance of the difference between a cell’s transfer delay and the
expected transfer delay measured in number of cells. Enter from 0
to 255 or * (means 0).
scr
: The Sustained Cell Rate (SCR) sets the average cell rate
(long-term) that can be transmitted (measured in cells per
second). SCR applies to the VBR traffic class.
bt: Burst Tolerance (BT) is the maximum number of cells that the
port is guaranteed to handle without any discards (number of
cells). BT applies to the VBR traffic class.
H/H
adsl vcprofile delete
< vcprofile >
You cannot delete a virtual channel profile that is assigned to any
of the ADSL ports. Assign a different profile to any ADSL ports
that are using the profile that you want to delete, and then you
can delete the profile. H/H
Table 195 Virtual Channel Profile Commands
COMMAND DESCRIPTION P
Figure 220 Set Virtual Channel Profile Command Example 1
ras> adsl vcprofile set gold llc cbr 300000 5