Figure 5-12 Bxm Port (Access Uni) Ingress Operation - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 5 BXM Card Sets: T3/E3, 155, and 622
For ABR cells, additional functions are performed by the SABRE ABR connection controller,
including: VSVD, Foresight, and virtual connection queueing.

Figure 5-12 BXM Port (Access UNI) Ingress Operation

BPX
Backplane/
StrataBus
The egress flow of ATM cells out of the BXM when the card is configured for port (access) operation
is shown in Figure 5-13.
ATM cells are:
1. Routed to the BXM-622 via the BPX Backplane/Stratabus from the BPX crosspoint switch,
Applied to the DRSIU,
2.
To an egress queue per class of service, and
3.
Served out to the SUNI (OC-3/OC-12) or Mux/Demux (T3/E3)
4.
Which processes the ATM cells into frames,
5.
Processes the cells from the ATM layer to the physical, and
6.
7. On out to customer premise equipment connected to the ports on the BXM backcard.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
SABRE Scheduling and ABR Engine
SIMBA Serial I/F and Multicast Buffer ASIC
RCMP Routing Ctl, Monitoring, & Policing ASIC
DRSIU Dual Receiver Serial I/F Unit
Cell Memory
800 Mbps
Ingress
to BPX
Switching
Matrix
BPX
Fabric
DRSIU
Backplane
SIMBA
1.6 Gbps
Egress
from
BPX
Switching
Matrix
Cell Memory
SUNI SONET/SDH UNI ASIC
ACP Sub-system Processor
ASIC Application Specific Integrated Ckt
Control/Admin Processor
(ACP)
Q-Database Stats Thresh
Ingress RCMP
Queue Route
Engine Control,
QE Monitoring,
Traffic
Policing
ABR
Connection
Controller
SABRE
ABR
Connection
Controller
SABRE
Engress
Queue
Engine
QE
Q-Database Stats Thresh
Cisco BPX 8600 Series Installation and Configuration
BXM Functional Description
Back
Card
T3/E3
SUNI From
8 or 12 port
for UNI
or
CPE
OC3
or
OC155
OC12
155.52
or
Mbps
Mux/
4 or 8 port
Demux
or
for
T3/E3
OC12
622.08
Mpbs
1 or 2 port
S6167xmod
5-23