5-23
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
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,
including: VSVD, Foresight, and virtual connection queueing.
Figure 5-12 BXM Port (Access UNI) 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-622 via the BPX Backplane/Stratabus from the BPX crosspoint switch,
2.
Applied to the DRSIU,
3.
To an egress queue per class of service, and
4.
Served out to the SUNI (OC-3/OC-12) or Mux/Demux (T3/E3)
5.
Which processes the ATM cells into frames,
6.
Processes the cells from the ATM layer to the physical, and
7.
On out to customer premise equipment connected to the ports on the BXM backcard.
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
S6167xmod
Содержание BPX 8600 Series
Страница 43: ...P A R T 1 The BPX Switch ...
Страница 44: ......
Страница 151: ...P A R T 2 Installation ...
Страница 152: ......
Страница 261: ...P A R T 3 Initial Configuration and Network Management ...
Страница 262: ......
Страница 291: ...P A R T 4 Configuring Connections ...
Страница 292: ......
Страница 481: ...P A R T 5 Troubleshooting and Maintenance ...
Страница 482: ......
Страница 531: ...P A R T 6 BPX Specifications ...
Страница 532: ......
Страница 563: ...P A R T 7 Appendices ...
Страница 564: ......
Страница 624: ...Glossary 24 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...
Страница 630: ...Index 6 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...