Figure 5-1 A Bpx Switch Network With Bxm Cards - Cisco BPX 8620 Installation And Configuration Manual

Overview: BXM Cards
Figure 5-1
ATM
Hub
BXM cards are compliant with ATM Forum UNI 3.1 and Traffic Management 4.0 specifications
including Available Bit Rate (ABR) VS/VD. These cards provide the capacity to meet the needs of
emerging bandwidth driven applications.
The types of BXM cards are regular and enhanced. The enhanced BXM cards (also called BXM-E)
improve upon the regular BXM cards by delivering more cost-effective ATM switching and traffic
management and support a higher connection density on certain models. Throughout this document,
BXM is used to denote either the regular BXM or BXM-E. Specific BXM-E models are denoted with
suffix D, DX, E, or EX.
The BXM cards are designed to support the following service classes:
Constant Bit Rate (CBR)
•
• Real time and nonreal time Variable Bit Rate (rt-VBR and nrt-VBR)
ABR with VS/VD
•
ABR without VS/VD
•
ABR with VS/VD supports Explicit Rate Marking and Congestion Indication (CI) control.
•
ABR using ForeSight
•
• Unspecified Bit Rate (UBR).
All software and administration firmware for the BXM card is downloadable from the BCC and is
operated by the BXM on-board sub-system processor.
The following are the types of front and back cards used for the BXM card set:
• The BXM T3/E3 is available with a universal BPX-T3/E3 back card in 8 or 12 port versions.
The BXM-OC-3 is available with 4 or 8 port multi-mode fiber (MMF), single mode fiber (SMF), or
•
single mode fiber long reach (SMFLR) back cards.
The BXM-OC-12 is available with 1 or 2 port SMF or SMFLR back cards.
•
Any of the twelve general purpose slots in a BPX are used for the BXM cards. The same back cards are
used whether the BXM ports are configured as trunks or ports. Table 5-1 and Table 5-2 list the available
front and back card options for the BXM-T3/E3, BXM-155, and BXM-622.
Cisco BPX 8600 Series Installation and Configuration
5-2
A BPX Switch Network with BXM Cards
ATM
Hub
OC-3 UNI OC-12 UNI
BPX
OC-12 UNI
BPX
DS3
OC-3 UNI DS3
PoP
BPX
DS3
BPX
OC-12/STM-4
Backbone
DS3
BPX
OC-12 UNI
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Chapter 5 BXM Card Sets: T3/E3, 155, and 622
Access
Network