Detailed Description Of Port (Uni) And Trunk Modes; Drsiu; Figure 5-15 Bxm Trunk Egress Operation - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

BXM Functional Description

Figure 5-15 BXM Trunk Egress Operation

BPX
Backplane/
StrataBus

Detailed Description of Port (UNI) and Trunk Modes

This section is a summary of the principal functions performed by the major functional circuits of the
BXM.

DRSIU

The DRSIU provides a total egress capacity from the BPX switch fabric of 1.6 Gbps.
Cisco BPX 8600 Series Installation and Configuration
5-26
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
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 5 BXM Card Sets: T3/E3, 155, and 622
Back
Card
T3/E3
SUNI
8 or 12 port
for
or
OC3
or
OC155.52
OC12
Mbps 4 or 8
or
port
Mux/
or
Demux
for
OC12
T3/E3
622.08
Mpbs
1 or 2 port
To
Node or
Network
via
Trunk