User's Manual

Table Of Contents

received from a given input port but may or may not be allowed to be transmitted out

of a port or ports. The possible values are 1522, 2048 and 10240 Bytes.

NOTE: The definition of frame size is counting the frame bytes from MAC_DA

through Layer2 CRC of the frame.

Pause limit in

[frame]

Limit the number of continuous Pause refresh frames that can be received on this

port (if full-duplex) or the number of 16 consecutive collisions (if half-duplex). When

a port has flow control enabled, this parameter can be used to limit how long this port

can be Paused or Back Pressured off to prevent a port stall through jamming.

The Flow Control on the port is (temporarily) disabled when the Pause refresh frames

count exceeds the value of this parameter.

Setting this parameter to 0 will allow continuous jamming to be received on this

port.

Pause limit out

[frame]

Limit the number of continuous Pause refresh frames that can be transmitted from

this port – assuming each Pause refresh is for the maximum pause time of 65536

slot times. When full-duplex Flow Control is enabled on this port, this parameter is

used to limit the number of Pause refresh frames that can be generated from this

port to keep this port’s link partner from sending any data.

Clearing this parameter to 0 will allow continuous Pause frame refreshes to egress

this port as long as this port remains congested.

Setting this parameter to 1 will allow 1 Pause frame to egress from this port for

each congestion situation.

Setting this parameter to 2 will allow up to 2 Pause frames to egress from this

port for each congestion situation, etc.

Ignore Frame

checksum

Ignore Frame checksum (FCS) - or in other words - Force good FCS in the frame. When

this parameter is not set (default behaviour), frames entering this port must have a good

CRC or else they are discarded. When this parameter is set, the last four bytes of frames

received on this port are overwritten with a good CRC and the frames are accepted by

the switch (assuming that the frame’s length is good and it has a destination).

Configuration