Alert types, Alert types -20 – HP 8000M User Manual

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Alert Types

The following table lists the types of alerts that can be generated.

Table 3-2.

Alert Strings and Descriptions

Alert String

Alert Description

First Time Install

Important installation information for your switch.

Too many undersized/giant packets

A device connected to this port is transmitting packets shorter than 64 bytes or
longer than 1518 bytes (longer than 1522 bytes if tagged), with valid CRCs (unlike
runts, which have invalid CRCs).

Excessive jabbering

A device connected to this port is incessantly transmitting packets (“jabbering”),
detected as oversized packets with CRC errors.

Excessive CRC/alignment errors

A high percentage of data errors has been detected on this port. Possible causes
include:
• Faulty cabling or invalid topology.
• Duplex mismatch (full-duplex configured on one end of the link, half-duplex

configured on the other)

• A malfunctioning NIC, NIC driver, or transceiver

Excessive late collisions

Late collisions (collisions detected after transmitting 64 bytes) have been
detected on this port. Possible causes include:
• An overextended LAN topology
• Duplex mismatch (full-duplex configured on one end of the link, half-duplex

configured on the other)

• A misconfigured or faulty device connected to the port

High collision or drop rate

A large number of collisions or packet drops have occurred on the port. Possible
causes include:
• A extremely high level of traffic on the port
• Duplex mismatch
• A misconfigured or malfunctioning NIC or transceiver on a device connected

to this port

• A topology loop in the network

Excessive broadcasts

An extremely high percentage of broadcasts was received on this port. This
degrades the performance of all devices connected to the port. Possible causes
include:
• A network topology loop—this is the usual cause
• A malfunctioning device, NIC, NIC driver, or software package

Network Loop

Network loop has been detected by the switch.

Loss of Link

Lost connection to one or multiple devices on the port.

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