Cabletron Systems pmn Multicast Pkts Read-only, CRC Align Errors Read-only, Fragments Read-only

Chapter 5: Local Management

Multicast Pkts (Read-only)

The Multicast Pkts field displays the total number of good frames received that were directed to a multicast address. The value of this field does not include frames directed to the broadcast address.

CRC Align Errors (Read-only)

This field displays the number of frames with bad Cyclic Redundancy Checks (CRC) received from the network. The CRC is a 4-byte field in the data frame that ensures that the data received is the same as the data that was originally sent.

Undersized Pkts (Read-only)

This field displays the number of frames received whose size was less than the minimum Ethernet frame size of 64 bytes, not including preamble, but have a valid CRC.

Oversized Pkts (Read-only)

This field displays the number of frames received whose size exceeded 1518 data bytes, not including preamble, but have a valid CRC.

Fragments (Read-only)

This field displays the number of received frames that are not the minimum number of bytes in length or received frames that had a bad CRC, and were less than 64 bytes in length (excluding framing bits, but including CRC bytes).

NOTE

It is normal for the Fragments field to increment. This is because the RMON agent increments the field when runts (undersized frames) are detected (which are normal occurrences due to collisions) and when noise hits occur.

Jabbers (Read-only)

This field displays the total number of frames that were greater than 1518 bytes and had a bad CRC.

Total Packets (Read-only)

This field displays the total number of frames (including bad frames, broadcast frames, and multicast frames) received on this interface.

5-68 2M46-04R/2M46-04RDC User’s Guide