Traffic Shaping For Cbr, Rt-Vbr, Nrt-Vbr, And Ubr; Figure 21-3 Atm Connection Flow Via Bpx Switches - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 21 Configuring ATM Connections

Figure 21-3 ATM Connection Flow via BPX Switches

ATM Cell Flow, Simplified
In
CPE 1
ATM
Service
Line
LEGEND:
vc qbin-per vc (16K to 64K)
(clp hi, clp lo, efci, etc., same as
cnfportq)
traffic shaping ckts

Traffic Shaping for CBR, rt-VBR, nrt-VBR, and UBR

With the introduction of traffic shaping for CBR, VBR, and UBR, you have the option to provide traffic
shaping for these connections types on the BXM. Previously, only ABR utilized traffic shaping. Traffic
shaping involves passing CBR, VBR, or UBR traffic streams through VC queues for scheduled rate
shaping.
Traffic shaping is performed on a per port basis. When traffic shaping is enabled, all traffic exiting the
port (out to the network) is subject to VC scheduling based on the parameters you configure for the
connection.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
BXM 3
In
Ingress
port qbins (cnfportq)
cbr
rt-vbr.
nrt-vbr
ubr/abr
BPX 1
BXM 10
In
Out
Network
Trunk
policing
BCC crosspoint
switch
Out
Egress
trunk qbins (cnftrkparm)
high priority
TS
NTS
Bursty Data A
Bursty Data B
cbr
rt-vbr & voice
nrt-vbr
abr
ubr
Qbins 11-16
svc queue pool
MPLS queues
16 CoS per each of 31 Virtual I/Fs
Cisco BPX 8600 Series Installation and Configuration
ATM Connection Flow
BPX 2
BXM 11
BXM 5
per card slot server
qbins (clp hi, clp lo, efci,
etc., same as cnftrkparm)
high priority
TS
NTS
Bursty Data A
Bursty Data B
cbr
rt-vbr
nrt-vbr
abr
ubr
Qbins 11-16
svc queue pool
MPLS queues
16 CoS per each of 15 slot
servers
CPE 2
Out
Service
Line
21-13