Cisco Systems 3000 Series manual 250299

The autonegotiation feature is enabled by default on the switch. At this setting, the switch module ports configure themselves to operate at the speed of attached devices. If the attached device does not support autonegotiation, you can explicitly set the switch module port speed and the duplex parameters. To maximize performance, either allow the ports to autonegotiate both speed and duplex, or set the port speed and duplex parameters on both ends of the connection.

For simplified cabling, the automatic medium-dependent interface crossover (auto-MDIX) feature is enabled by default on the switch. With auto-MDIX enabled, the switch detects the required cable type for copper Ethernet connections and configures the interface accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a switch 10/100/1000 Ethernet port, regardless of the type of device on the other end of the connection.

See the switch module software configuration guide or the command reference for more information about enabling or disabling autonegotiation and auto-MDIX.

Install and Connect to Devices in the 10-Gigabit Ethernet Slots

The switch module 10-Gigabit Ethernet module slots are used for connections to other switches and routers. The module slots operate in full-duplex mode and use the hot-swappable

Cisco X2 transceiver modules and the Cisco TwinGig Converter Module. The X2 transceiver modules have SC connectors to connect to multimode fiber (MMF) and single-mode fiber (SMF) cables. The Cisco converter modules have two SFP-module slots that convert the 10-Gigabit interface into a dual SFP module interface.

SYST	UID
S-
MODE
S-MSTR
S-
MMBR
	MODE
	CONSOLE

19-20

23x
	STK A
22
24x	STK B
26x WS-
CBS312	0G-S

250299

Use only Cisco X2 transceiver modules, Cisco converter modules, and Cisco SFP modules with the switch module. Each Cisco module has an internal serial EEPROM that is encoded with security information. This encoding provides a way for Cisco to identify and validate that the module meets the requirements for the switch module.

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