Allied Telesis C613-02013-00 Autonegotiation of Port Speed and Duplex Mode, Layer 2 Switching

Layer 2 Switching		29
	Table 3: Parameters in the output of the SHOW SWITCH PORT command
	Parameter	Meaning
	Actual speed/duplex	The port speed and duplex mode that this port is actually
		running at. A combination of a speed (one of “10 Mbps”,
		“100 Mbps” or “1000 Mbps”) and a duplex mode (one of
		“half duplex” or “full duplex”).
	Acceptable Frames Types	The value of the Acceptable Frames Type parameter, one of:
		“Admit All Frames” or “Admit Only VLAN-tagged Frames”.
	Broadcast rate limit	The limit of the rate of reception of broadcast frames for
		this port, in frames per second.
	Multicast cast rate limit	The limit of the rate of reception of multicast frames for this
		port, in frames per second.
	DLF rate limit	The limit of the rate of reception of DLF (destination lookup
		failure) frames for this port, in frames per second.
	Learn limit	The number of MAC addresses that may be learned for this
		port. Once the limit is reached, the port is locked against
		any new MAC addresses. One of “None” or a number from
		1 to 256.
	Intrusion action	The action taken on this port when a frame is received from
		an unknown MAC address when the port is locked. One of
		"None", “Discard”, “Trap” or “Disable”.
	Current learned, lock state	The number of MAC addresses currently learned on this
		port and the state of locking for this port. The lock state is
		one of “not locked”, “locked by limit” or “locked by
		command”.
	Mirroring	The traffic mirroring for traffic in and out of this port. One
		of “None”, “Rx” (for traffic received by this port), “Tx” (for
		traffic sent on this port) or “Both”. The port to which
		mirrored frames are being sent is also displayed.
	Is this port mirror port	Whether or not this port is a mirror port. One of “No” or
		“Yes”.
	Enabled flow control(s)	Flow control parameters set for the port; zero, one or two
		of ”Jamming” and “Pause”. If flow control is implemented
		on the switch, then this kind of flow control is applied to the
		port.
	Send tagged pkts for VLAN(s)	The name and VLAN Identifier (VID) of the tagged VLAN(s),
		if any, to which the port belongs.
	Port-based VLAN	The name and VLAN Identifier (VID) of the port-based VLAN
		to which the port belongs.
	Ingress Filtering	The state of Ingress Filtering: one of “ON” or “OFF”.
	Trunk Group	Name of trunk group to which the port belongs, if any.
	STP	The name of the STP to which the port belongs.

Autonegotiation of Port Speed and Duplex Mode

Each of the switch ports can operate at either 10 Mbps or 100 Mbps, in either full duplex or half duplex mode. In full duplex mode a port can transmit and receive data simultaneously, while in half duplex mode the port can either transmit or receive, but not at the same time. This versatility makes it possible to connect devices with different speeds and duplex modes to different ports on the switch. Such versatility also requires that each port on the switch know

Rapier Switch Software Release 2.2.1 C613-02013-00 Rev A