The HP SN6000 Fibre Channel Switch has 20 Fibre Channel Small Form-Factor Pluggable (SFP) ports and four Fibre Channel XPAK ports. SFP ports are numbered 0–19 (Figure 3). Each SFP port is served by an SFP optical transceiver and is capable of 1, 2, 4, or 8 Gb/s transmission. SFP ports are hot-pluggable and can self-discover both the port type and transmission speed when connected to devices or other switches. The port LEDs are located above ports 0–9 and below ports 10–19, and provide port login and activity status information.