Technical data

Brocade VDX 8770-4 Hardware Reference Manual 51

53-1002563-05

Determining the status of a system fabric module

At least one functional switch fabric module (SFM) must be plugged into slots S1 or S2 (the “control

plane slots”). If there are no functional SFMs in either slot during bootup, bootup is halted with a

message indicating that condition.

In an operational chassis, if all SFMs in the control plane slots become faulty or are removed, then

all the line cards will be faulted with a reason code that indicates no availability of an SFM. An

external RASlog message will also be displayed.

Complete the following steps to determine the status of an SFM.

1. Check the LED indicators on the SFM (refer to Figure 16). The LED patterns may temporarily

change during POST and other diagnostic tests. For information about how to interpret the LED

patterns, refer to Table 12.

2. You can use the show sfm command or the show slots command to see whether the SFM is

enabled.

Figure 16 identifies the switch fabric module.

FIGURE 16 Switch fabric module

Table 12 describes the switch fabric module LED patterns and the recommended actions for those

patterns.

1 Power LED 2 Status LED

TABLE 12 Switch fabric module LED descriptions

LED purpose Color Status Recommended action

Power No light (LED is off) SFM is not on. Ensure that the SFM is firmly seated

and the power switch is turned on

(slider is covering the captive

screw).

Steady green SFM is on. No action required.