Figure 21-27 Vbr.2 Connection, Leaky Bucket 2 Discarding Clp (0) Cells - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Traffic Policing Examples

Figure 21-27 VBR.2 Connection, Leaky Bucket 2 Discarding CLP (0) Cells

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)
discards if depth
> CDVT(0+1)
Figure 21-28 shows a VBR.1 connection policing example, with policing set to 1, and both buckets
compliant.
Leaky bucket 1 is policing the CLP (0+1) cell stream for conformance with the PCR limit.
Leaky bucket 2 is policing the CLP (0+1) cell stream for conformance with CDVT plus maximum burst
size MBS (as specified by BT), and for compliance with SCR sustained cell rate.
Cisco BPX 8600 Series Installation and Configuration
21-52
4 3 2
CLP=0 CLP=1 CLP=0
5
CLP=1
4
CLP=0
CLP(0) cells
+
compliant with
Leaky Bkt 1,
applied to
Leaky Bkt 2
Leaky Bkt 1
Two CLP(0) cells, 1 and 2, are shown as
non-compliant with the BT + CDVT limit
of Leaky Bkt 2 and are discarded in this
policing = 3, they would be tagged as
CLP=1 and admitted to the network.
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
example where policing = 2. With
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 21 Configuring ATM Connections
4 To network
CLP=0
+
Discard