Cisco Systems 3000 Series manual 100BASE-T

Table 2 describes the switch module ports. Each external port has an associated LED.

Table 2 Cisco Catalyst Blade Switch 3020 for HP Port Descriptions

Port	Description
Ports 1 to 16	Internal Gigabit Ethernet 1000BASE-X downlink ports.
Ports 17 to 20 and	Dual-purpose SFP module/RJ-45 copper Ethernet uplink ports. The SFP module
Ports 17x to 20x	ports support only Cisco 1000BASE-SX fiber-optic modules.
	By default, the switch module dynamically selects the interface type that first
	links up. SFP modules have precedence if both SFP module and copper Ethernet
	interface types are in link-up state. You can also specifically configure each port
	for either copper Ethernet or SFP modules if you do not want to use
	autodetection.
	The copper Ethernet ports support automatic medium-dependent interface
	crossover (auto-MDIX) and autonegotiation.
	For information about configuring speed and duplex settings for a
	dual-purpose uplink port, see the software configuration guide.
Ports 21x to 22x	External 10/100/1000BASE-T copper Gigabit Ethernet uplink ports that
	support auto-MDIX and autonegotiation.
Ports 23x to 24x	Dual-purpose external/internal 10/100/1000BASE-T copper Gigabit Ethernet
	uplink ports. These ports can be configured for internal 1000BASE-X
	cross-connection with a corresponding switch module. When ports 23x and
	24x are in external operation mode, they support auto-MDIX and
	autonegotiation. The default is external operation mode.
Internal	The Ethernet management port (Fa0) is used only for switch module
100BASE-T	management traffic, not for data traffic. It is connected to the Onboard
Ethernet port	Administrator through the blade enclosure backplane connector.
Console port	Switch module management port (RJ-45 connector).

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