Figure 5-14 Bxm Trunk Ingress Operation - Cisco BPX 8620 Installation And Configuration Manual

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

Figure 5-14 BXM Trunk Ingress Operation

BPX
Backplane/
StrataBus
The egress flow of ATM cells out of a BXM interface configured for trunk operation is shown in
Figure 5-15.
On egress, ATM cells are:
Routed to the BXM from the BPX crosspoint switch.
1.
Connected to an egress queue per class of service.
2.
3. Served out to the SUNI (OC-3/OC-12) or Demux/Mux (T3/E3).
Used to process the ATM cells into frames, for example, SUNI or Demux/Mux.
4.
5. Processed from the ATM layer to the physical layer.
Accessed to the back card trunk interface, which connects to another node.
6.
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
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
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
5-25
From