Cabletron Systems 2208 manual Multicast Pkts Read-only

Chapter 5: Local Management

Multicast Pkts (Read-only)

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

CRC Align Errors (Read-only)

This field displays the number of packets with bad Cyclic Redundancy Checks (CRC) received from the network. The CRC is a 4-byte field in the data packet that ensures that the data received is the same as the data that was originally sent. Alignment errors are due to packets not sent to higher level protocols in the correct order.

Undersized Pkts (Read-only)

The Undersized Pkts field displays the number of packets received with a valid CRC and whose size was less than the minimum Ethernet frame size of 64 bytes (not including preamble).

Oversized Pkts (Read-only)

The Oversized Pkts field displays the number of packets received with a valid CRC and whose size exceeded 1518 data bytes (not including preamble).

Fragments (Read-only)

This field displays the number of received packets with less than the minimum number of bytes, or received packets, were less than 64 bytes (excluding framing bits), but including Frame Check Sequence (FCS) bytes) that had a bad FCS, and an invalid CRC.

NOTE

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

Jabbers (Read-only)

This field displays the total number of packets that were greater than 1518 bytes and had either a bad FCS or a bad CRC.

Total Packets (Read-only)

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

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