10 S25P System OverviewEquipmentThe following items are necessary to install the S25P system:• The switch• At least one grounded AC power source per S25P• One AC cable is included to connect the AC power source to the S25P(power cables are not supplied for the S25P-DC)• Bracket ears for rack installation (supplied)• Screws for rack installation (supplied) and #2 Phillips screwdriver (not supplied)Other optional components are:• Stacking cables for connecting S-Series switches in a stack• Optical networking components (see Chapter 4, Installing Ports, on page 29)• Stacking components (see Ports, below)Features• S25P CPU and switch processor• 32MB internal Flash memory• 256MB RAM• Stackable switch features• 19-inch rack-mountable• Standard 1U chassis height• Six built-in fans• Two internal AC power supplies acting in load-sharing mode• Up to 16384 MAC address entries supported with hardware-assisted aging• Supports 9252-byte jumbo frames in FTOS, 9216-byte jumbo frames in SFTOS• Back-pressure support at half-duplex, IEEE 802.3x flow control at full duplex• Extensive LED system with per-port LEDsPorts• 24 SFP ports capable of using 100/1000 Base-T or 1000 Base-X using auto-media detect• Four shared RJ45 10/100/1000 Base-T ports• Console port (see Accessing the Console Port on page 29): Supplied with console cable(straight-through Ethernet copper cable) and terminal adapter (DB-9 to RJ-45)• Two expansion slots that accept any combination of the following optional, high-capacity uplinkmodules:— 10GbE XFP (two ports)— 10GbE CX4 (two ports)— 12G Stacking (two ports)— 24G Stacking (one port)See Inserting Optional Modules (10-Gigabit or Stacking) on page 17 and Connecting Stack Ports(optional) on page 25.