Figure 21-23 Vbr Connection, Upc Overview - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Traffic Policing Examples

Figure 21-23 VBR Connection, UPC Overview

VBR Traffic
TAT
Example: VBR.2
5
CLP=1
Time
interval
variations
CDVT(0+1)
Leaky Bkt 1
PCR(0+1)
Cisco BPX 8600 Series Installation and Configuration
21-48
Verify
Multiple PVCs
VPIs,
VCIs
CPE
Cells
per
MBS=
sec.
PCR x BT
Time
Clumping
(Cells arriving early, i.e, at a
higher than contracted rate)
TAT TAT TAT
Policing = 2
4 3 2
CLP=0 CLP=1 CLP=0
5
CLP=1
4
CLP=0
CLP(0) cells
+
compliant with
Leaky Bkt 1
are applied to
Leaky Bkt 2
with Policing = 2.
To UPC for each
individual PVC
Policing
PCR
SCR
Cells arriving late
(at a less than
contracted
TAT TAT TAT
1
CLP=0
3 CLP(1) cells compliant with Leaky Bkt 1, admit to network
CLP=1
2 1
CLP=0 CLP=0
BT + CDVT
Leaky Bkt 2
SCR
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 21 Configuring ATM Connections
For VBR connections, the first bucket
polices PCR compliance within the
CDVT(0+1) limits. The second bucket
polices compliance in terms of
sustained cell rate and data bursts
within the BT + CDVT limits.
cell rate)
TAT
4 2
CLP=0 CLP=0 CLP=0
Admit to network
+
1