5-23
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
For ABR cells, additional functions are performed by the SABRE ABR connection controller, which
includes VS/VD, ForeSight, and virtual connection queueing.
Figure 5-12 BXM Access Port Ingress Operation
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 through the BPX Backplane/Stratabus from the BPX crosspoint switch.
2.
Connected to a VC queue per connection basis.
3.
Used for egress queue per class of service.
4.
Served out to the SUNI (OC-3/OC-12) or Mux/Demux (T3/E3)
5.
Processed from the ATM layer to the physical layer.
6.
Accessed to the customer premise equipment and connected to the ports on the BXM back card.
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
155.52 Mbps
4 or 8 port
or
OC12
622.08
Mpbs
1 or 2 port
From
UNI
CPE
ABR
Connection
Controller
SABRE
ABR
Connection
Controller
SABRE
Ingress
Queue
Engine
QE
Engress
Queue
Engine
QE
Cell Memory
Q-Database
Stats Thresh
35743
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: ......