Switch Fabric (Sf) Module In An Ex8208 Switch - Juniper EX8208 Hardware Manual

Table 34: SRE Module LEDs of an EX8208 Switch (continued)
LED Label (Description)
SF (Switch Fabric)

Switch Fabric (SF) Module in an EX8208 Switch

The Switch Fabric (SF) module provides switching functionality. See
An EX8208 switch can have either zero SF modules or one SF module. The base configuration of an EX8208
switch includes one SF module. See
Figure 18: SF Module in an EX8208 Switch
The SF module can be installed only in the slot labeled SF. The SF module is keyed so that it does not fit
in the other slots in the chassis. See
In the base configuration, an SF module is used with a single Switch Fabric and Routing Engine (SRE)
module to build a nonredundant system that provides full bandwidth. However, a base configuration
EX8208 switch has no Routing Engine and switch control redundancy or switch fabric redundancy. In a
base configuration, the main function of the SF module is to switch data between line cards. See
"Understanding EX8208 Switch Component and Functionality Redundancy" on page
In a redundant configuration, an SF module is used with two SRE modules to achieve full bandwidth along
with Routing Engine and switch control redundancy and switch fabric redundancy. In a redundant
Color
Green
Yellow
Unlit
"EX8208 Switch Configurations" on page
"Slot Numbering for an EX8208 Switch" on page
State and Description
On steadily—Switch fabric in the SRE module is operating
normally.
Blinking—Switch fabric in the SRE module is in standby
mode.
Switch fabric in the SRE module has failed.
SRE module is powered off.
Figure 18 on page 81.
27.
40.
37.
81