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Autonegotiation of port speed and duplex mode – Allied Telesis Rapier Switch User Manual

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Layer 2 Switching

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

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

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.

Table 3: Parameters in the output of the SHOW SWITCH PORT command

Parameter

Meaning