ii
Powering on the switch·················································································································································· 30
Maintenance and troubleshooting ···························································································································· 31
Software loading failure ················································································································································ 31
Power supply failure ······················································································································································ 31
Fan failure ······································································································································································· 33
Configuration terminal problems ·································································································································· 33
Appendix A Chassis views and technical specifications ························································································ 34
Chassis views ································································································································································· 34
S5120-28C-EI ························································································································································ 34
S5120-52C-EI ························································································································································ 35
S5120-24P-EI ························································································································································· 36
S5120-48P-EI ························································································································································· 36
S5120-28C-PWR-EI ··············································································································································· 37
S5120-52C-PWR-EI ··············································································································································· 38
Technical specifications ················································································································································· 40
Appendix B Ports and LEDs ······································································································································· 43
Ports ················································································································································································· 43
Console port ·························································································································································· 43
10/100/1000Base-T Ethernet port ···················································································································· 43
SFP port ·································································································································································· 43
Combo interface ···················································································································································· 43
LEDs ················································································································································································· 44
System status LED··················································································································································· 44
RPS status LED ························································································································································ 45
Port mode LED ························································································································································ 45
Seven-segment LED ················································································································································ 45
10/100/1000Base-T auto-sensing Ethernet port status LED ············································································ 47
SFP port status LED ················································································································································ 48
Interface card status LED ······································································································································· 49
Appendix C FRUs and compatibility matrixes ········································································································· 50
Interface cards ································································································································································ 50
SFP/SFP+/XFP transceiver modules and SFP+/CX4 cables ····················································································· 50
Appendix D Lightning protection of the switch ········································································································ 53
Installation of lightning arrester for ac power (socket strip with lightning protection) ············································ 53
Index ··········································································································································································· 55
