IBM SC30-3681-08 manual Circuit, Nicknames, and State, Input frame errors

Monitoring Frame Relay Interfaces

Maintenance Failed

Indicates the total number of times the interface was unable to communicate with Frame Relay management.

V.24 circuit, Nicknames, and State

The circuits, control signals, pin assignments and their state (ON or OFF). Note: The symbol - - - in monitoring output indicates that the value or state is unknown.

Line speed

The transmit clock rate.

Last port reset

The length of time since the last port reset.

Input frame errors:

CRC error

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

Alignment

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

Too short

The number of packets that were less than 2 bytes in length and as a result were discarded.

Too long

The number of packets that were greater than the con®gured size, and as a result were discarded.

Aborted frame

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

DMA/FIFO overrun

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

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.

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.

Output frame counters:

DMA/FIFO underrun errors

The number of times the serial interface could not retrieve data fast enough from the system packet buffer memory to transmit them to the network.

446MRS V3.2 Software User's Guide