Figure 12. S3124F I/O Side LEDs
1. Gigabit Ethernet (100BASEFX/1000BASE-X) SFP port LNK.
2. Gigabit Ethernet (100BASEFX/1000BASE-X) SFP port ACT.
3. Console port LNK. 
4. Management port LNK. 
5. Management port ACT. 
6. Stack number.
7. Temperature.
8. PSU 1.
9. System Status.
10. Fan.
11. PSU 2.
12. M (Master).
13. SFP+ (10G) port ACT. 
14. SFP+ (10G) port LNK. 
15. Combo SFP (1G) port ACT. 
16. Combo SFP (1G) port LNK. 
Table 2. S3124F I/O Side LED Descriptions
Feature Detailed Description
Gigabit Ethernet (100BASEFX/
1000BASE-X) SFP port
LNK (Link speed):
• Off — no link.
• Solid green — link on 1 Gbps speed.
• Solid yellow — link on 100 Mbps speed.
S3100 Series Hardware Overview
15