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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Chapter 5 BXM Card Sets: T3/E3, 155, and 622
BXM Functional Description
Figure 5-15 BXM Trunk Egress Operation
Summary of Circuitry Functions
This section is a summary of the principal functions performed by the major functional circuits of the
BXM.
DRSIU
The Dual Receiver Serial I/F Unit (DRSIU) provides a total egress capacity from the BPX switch fabric
of 1.6 Gbps.
SONET/SDH UNI (SUNI)
The SUNI ASIC implements the BXM physical processing for OC-3 and OC-12 interfaces. SUNI
provides SONET/SDH header processing, framing, ATM layer mapping, and processing functions for
OC-12/STM-4 (622.08 Mbps) or OC-3/STM1 (155.52 Mbps).
S6170
SUNI
ACP
ASIC
SABRE
SIMBA
RCMP
DRSIU
Scheduling and ABR Engine
Serial I/F and Multicast Buffer ASIC
Routing Ctl, Monitoring, & Policing ASIC
Dual Receiver Serial I/F Unit
SONET/SDH UNI ASIC
Sub-system Processor
Application Specific Integrated Ckt
Control/Admin Processor
(ACP)
Cell Memory
Q-Database
Stats Thresh
BPX
Backplane/
StrataBus
800 Mbps
Ingress
to BPX
Switching
Matrix
1.6 Gbps
Egress
from
BPX
Switching
Matrix
DRSIU
BPX
Fabric
Backplane
SIMBA
RCMP
Route
Control,
Monitoring,
Traffic
Policing
SUNI
for
OC3
or
OC12
or
Mux/
Demux
for
T3/E3
Back
Card
T3/E3
8 or 12 port
or
OC155.52
Mbps 4 or 8
port
or
OC12
622.08
Mpbs
1 or 2 port
Ingress
Queue
Engine
QE
Engress
Queue
Engine
QE
Cell Memory
Q-Database
Stats Thresh
To
Node or
Network
via
Trunk
Summary of Contents for BPX 8650
Page 49: ...P A R T 1 The BPX Switch ...
Page 50: ......
Page 159: ...P A R T 2 Installation ...
Page 160: ......
Page 273: ...P A R T 3 Initial Configuration and Network Management ...
Page 274: ......
Page 311: ...P A R T 4 Configuring Connections ...
Page 312: ......
Page 487: ...P A R T 5 Troubleshooting and Maintenance ...
Page 488: ......
Page 533: ...P A R T 6 BPX Specifications ...
Page 534: ......
Page 555: ...P A R T 7 Appendices ...
Page 556: ......