IBM SC30-3681-08 manual Nicknames

Con®guring V.34

Nicknames

Common names for the circuits.

RS-232

EIA 232 (also known as RS-232) names for the circuits.

State Current state of the circuits (ON or OFF).

Line speed

The transmit clock speed (approximate).

Last port reset

Length of time since the port was reset.

Input frame errors:

CRC error

Number of packets received that contained checksum errors and as a result were discarded.

Alignment (byte length)

Number of packets received that were not an even multiple of 8 bits in length and as a result were discarded.

Missed Frame

When a frame arrives at the device and there is no buffer available, the hardware drops the frame and increments the missed frame counter.

too long (> nnnn bytes)

Number of packets received that were greater than the con®gured frame size and as a result were discarded.

DMA/FIFO overrun

The number of times the serial interface card could not send data fast enough to the system packet buffer memory to receive packets from the network.

L & F bits not set

On serial interfaces, the hardware sets input-descriptor information for arriving frames. If the buffer can accept the complete frame upon arrival, the hardware sets both the last and ®rst bits of the frame, indicating that the buffer accepted the complete frame. If either of the bits is not set, the packet is dropped, the L & F bits not set counter is incremented, and the buffer is cleared for reuse.

Note: It is unlikely that the L & F bits not set counter will be affected by traffic.

aborted frame

Number of packets received that were aborted by the sender or a line error.

Output frame counters:

DMA/FIFO underrun errors

Number of times the serial interface card could not retrieve data fast enough from the system packet buffer memory to transmit packets onto the network.

Output aborts sent

Number of transmissions that were aborted as requested by upper-level software.

Con®guring V.34 609