Figure 5-14 Bxm Trunk Ingress Operation - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 5 BXM Card Sets: T3/E3, 155, and 622

Figure 5-14 BXM Trunk Ingress Operation

SABRE
SIMBA
RCMP
DRSIU
BPX
Backplane/
StrataBus
The egress flow of ATM cells out of the BXM when the card is configured for trunk operation is shown
in Figure 5-15.
In egress, ATM cells are:
Routed to the BXM from the BPX crosspoint switch,
1.
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 Demux/Mux (T3/E3).
5. The SUNI or Demux/Mux, as applicable, processes the ATM cells into frames,
Processing the cells from the ATM layer to the physical and
6.
On out to the backcard trunk interface connecting to another node or network.
7.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Scheduling and ABR Engine
Serial I/F and Multicast Buffer ASIC
Routing Ctl, Monitoring, & Policing ASIC
Dual Receiver Serial I/F Unit
Control/Admin Processor
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
(ACP)
Q-Database Stats Thresh
Ingress RCMP
Queue Route
Engine Control,
QE
Monitoring,
Traffic
Policing
Engress
Queue
Engine
QE
Q-Database Stats Thresh
Cisco BPX 8600 Series Installation and Configuration
BXM Functional Description
Back
Card
T3/E3
SUNI
Node or
8 or 12 port
for
Network
or
OC3
via NNI
or
OC155.52
OC12
Mbps 4 or 8
or
port
Mux/
or
Demux
for
OC12
T3/E3
622.08
Mpbs
1 or 2 port
From
5-25