Cabletron Systems STHI manual The Device Statistics Screen, Internal Errors, Lost Frame Errors

The Device Statistics Screen

Internal Errors 5

Internal errors may be detected by the adapter’s hardware and/or firmware. These errors cause the adapter to remove itself from the ring and indicate a problem with the adapter hardware or firmware.

5.8.6Non-Isolating Errors (Group 4)

Frames reporting non-isolating errors do not provide sufficient information to determine the physical domain of a fault. These errors are common soft errors, meaning that they are to be expected and can be overcome by normal Token Ring operations. While they will not completely halt a network, excessive non-isolating errors reduce a network’s efficiency.

Lost Frame Errors 1

A Lost Frame Error may indicate that an adapter did not detect the return of the end of a frame it transmitted; the frame was lost somewhere on the ring. This can be caused by stations entering or leaving the ring.

Replacement frames are automatically generated.

Frame Copied Errors 2

A Frame Copied Error may indicate that a station received a frame with its address as the destination, but the address recognized indicator bits were not set to zero. This is primarily caused by stations having duplicate physical addresses (at least one of which would be a Locally Administered address). All MAC addresses are unique. Ensure that any Locally administered addresses assigned do not duplicate another network device’s physical address.

Rcvr Congestion Errors 3

A Rcvr Congestion Error may indicate that a station has received/repeated a frame addressed to it, but had no buffer space available to copy the frame. Replacement frames are automatically generated, but an excessive amount of these errors may indicate a hardware problem.

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