
Chapter 7. Cisco family routing products 209
7.2 Hardware and software
This section describes the software and hardware of the Cisco MDS 9000
Multilayer Switch Family.
7.2.1 Cisco MDS 9120 and 9140 Multilayer Switches
The Cisco MDS 9120 Multilayer Fabric Switch (IBM 2061-020) and Cisco MDS
9140 Multilayer Fabric Switch (IBM 2061-040) are one rack-unit (RU) fabric
switches that can support 20 or 40 shortwave or longwave small form-factor
pluggable (SFP) fiber optic transceivers. Some of these ports operate with a 3.2 to
one (3.2:1) over-subscription (fanout) and are referred to as
host optimized ports
.
The MDS 9120 has a total of 20 ports. The first ...