Rt-Vbr And Nrt-Vbr Connections; Configuring Vbr Connections - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

rt-VBR and nrt-VBR Connections

Example of cnftrk:
pubsbpx1
TRK
Transmit Rate:
Protocol By The Card:
VC Shaping:
Hdr Type NNI:
Statistical Reserve:
Idle code:
Connection Channels:
Traffic:V,TS,NTS,FR,FST,CBR,NRT-VBR,ABR, T-VBR
SVC Vpi Min:
SVC Channels:
SVC Bandwidth:
Restrict CC traffic:
Link type:
Routing Cost:
This Command: cnftrk 2.4
Transmit Rate [ 1-353208 ]:
rt-VBR and nrt-VBR Connections
VBR (variable bit rate) connections may be classified as either:
•
•

Configuring VBR connections

The characteristics of rt-VBR or nrt-VBR are supported by appropriately configuring the parameters of
the VBR connection.
When configuring a rt-VBR connection, the trunk cell routing restriction prompt does not display,
because rt-VBR connection routing is automatically restricted to ATM trunks.
Cisco BPX 8600 Series Installation and Configuration
21-16
TN silves
2.4 Config OC3
353208
No
No
Yes
1000
7F hex
256
0
0
0
No
Terrestrial
10
real time (rt-VBR)
This category is used for connections that transmit at a rate varying with time and that can be
described as bursty, often requiring large amounts of bandwidth when active. The rt-VBR class is
intended for applications that require tightly constrained delay and delay variation such as
compressed voice video conferencing—for example, video conferencing which requires real-time
data transfer with bandwidth requirements that can vary in proportion to the dynamics of the video
image at any given time. The rt-VBR category is characterized in terms of PCR, SCR (sustained
cell rate), and MBS (maximum burst size).
non-real time (nrt-VBR)
This category is used for connections that are bursty but are not constrained by delay and delay
variation boundaries. For those cells in compliance with the traffic contract, a low cell loss is
expected. Non-time critical data file transfers are an example of an nrt-VBR connection. A nrt-VBR
connection is characterized by PCR, SCR, and MBS.
BPX 8620 9.3 Aug. 1 2000 14:43 PDT
[353207cps] BXM slot:
Line framing:
coding:
CRC:
recv impedance:
cps cable type:
Pass sync:
clock:
HCS Masking:
Payload Scramble:
cps Frame Scramble:
Virtual Trunk Type:
Virtual Trunk VPI:
Deroute delay time:
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 21 Configuring ATM Connections
2
STS-3C
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No
No
Yes
Yes
Yes
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