Available Bit Rate Connections; Table 21-10 Vbr Policing Definitions - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 21 Configuring ATM Connections
Figure 21-7 rt-VBR and nrt-VBR Connection Prompt Sequence
rt-VBR or nrt-VBR
PCR(0+1)
%Util
CDVT(0+1)
FBTC (AAL5 Frame based traffic control, enable/disable)
SCR
MBS
Policing (1, 2, 3, 4, or 5)
Trunk cell routing
restrict (Y/N) [Y]
For policing prompt:
1
1 = VBR.1
2 = VBR.2
3 = VBR.3
4 = PCR policing only
5 = policing off
Note: BW allocation = (PCR)x(%Util)
For rt-VBR, trunk cell routing
2
is automatically restricted to
include only ATM trunks

Table 21-10 VBR Policing Definitions

Connection Type
rt/nrt-VBR, ABR, ATFR, ATFST,
ATFT, ATFTST, ATFX, ATFXFST
rt/nrt-VBR, ABR, ATFR, ATFST,
ATFT, ATFTST, ATFX, ATFXFST
rt/nrt-VBR, ABR, ATFR, ATFST,
ATFT, ATFTST, ATFX, ATFXFST
rt/nrt-VBR, ABR, ATFR, ATFST,
ATFT, ATFTST, ATFX, ATFXFST
rt/nrt-VBR, ABR, ATFR, ATFS,
ATFT, ATFTST, ATFX, ATFXFST

Available Bit Rate Connections

The ABR (available bit rate) category utilizes a congestion flow control mechanism to control
congestion during busy periods and to take advantage of available bandwidth during less busy periods.
The congestion flow control mechanism provides feedback to control the connections flow rate through
the network in response to network bandwidth availability.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
1
2
ATM Forum TM spec. PCR Flow
4.0 conformance (1st leaky
definition bucket)
VBR.1 CLP(0+1)
when policing set to 1
VBR.2 CLP(0+1)
when policing set to 2
VBR.3 CLP(0+1)
when policing set to 3
when policing set to 4 CLP(0+1)
when policing set to 5 off
for off
CLP tagging SCR Flow
(for PCR (2nd leaky
flow) bucket)
no CLP(0+1)
no CLP(0)
no CLP(0)
no off
n/a off
Cisco BPX 8600 Series Installation and Configuration
ATM Connection Configuration
CLP tagging
(for SCR
flow)
no
no
yes
n/a
n/a
21-31