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Cisco 11000 Series Content Services Switch Hardware Installation Guide
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Chapter 2 Cabling the CSS
Cabling the CSS 11800 Modules
Switch Fabric Module (SFM and SFM2) Connectors and LEDs
The Switch Fabric Module (SFM or SFM2) sets up and tears down flow
connections, monitors switch operation, and performs switch functions. The I/O
modules use the SFM processors to perform routing functions, including
resolution of unknown addresses, route determinations, protocol processing, and
other exception events.
Each module provides 10-Gbps switch control element for switching
functionality and flow processing for four I/O modules. You can install a second
active module to service four additional I/O modules. Both active modules are on
simultaneously in the CSS 11800. The chassis enables you to configure two
additional passive modules for redundancy. Therefore, you can configure a total
of four SFMs or SFM2s in a chassis, of which only two would be active at any
time.
Note
When the CSS 11800 contains two passive SFMs and an active SFM switchover
occurs, both passive SFMs switchover to become active SFMs.
You can mix SFMs with SFM2s in the same CSS 11800 chassis. However, you
must use the same type module as the active SFM and as the passive SFM.
The Switch Fabric Module (SFM and SFM2) contains Power, Status, and Active
LEDs. The SFM has four RJ-45 RS-232 Console and Diag connectors (all of these
connectors are reserved for field service diagnostic use only).
