Figure 21-26 Vbr.2 Connection, Policing = 2, With Buckets 1 And 2 Compliant - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 21 Configuring ATM Connections

Figure 21-26 VBR.2 Connection, Policing = 2, with Buckets 1 and 2 Compliant

Connection setup
and compliance status:
VBR.2
Policing = 2
Bkt 1 depth < CDVT(0+1)
Bkt 2 depth < BT + CDVT
5
CLP=1
Time
interval
variations
CDVT(0+1)
Leaky Bkt 1
PCR(0+1)
Figure 21-27 shows a VBR.2 connection policing example, with policing set to 2, and leaky bucket 2
non-compliant. Leaky bucket 2 is shown policing the CLP(0) cell stream for conformance with
maximum burst size MBS (as specified by BT), and for compliance with SCR (sustained cell rate).
In this example (policing set to 2), CLP tagging is not enabled, so that the cells that have exceeded the
BT + CDVT limit are discarded. In the example, either the sustained cell rate could have been exceeded
for an excessive interval, or a data burst could have exceeded the maximum allowed burst size.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
4 3 2
CLP=0 CLP=1 CLP=0 CLP=0
5
CLP=1
CLP=0
CLP(0) cells
+
compliant with
Leaky Bkt 1,
applied to
Leaky Bkt 2
1
3 CLP(1) cells compliant with Leaky Bkt 1, admit to network
CLP=1
4 2 1
CLP=0 CLP=0
BT + CDVT
Leaky Bkt 2
SCR
Cisco BPX 8600 Series Installation and Configuration
Traffic Policing Examples
4 2
CLP=0 CLP=0
CLP(0) cells
compliant
+
with Leaky Bkt 2,
admit to network
Discard
non-compliant
CLP(0) cells
1
CLP=0
21-51