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101

Diagnosing Switch Problems Monitoring Switch Health

OmniSwitch 6800/6850/9000 Network Configuration Guide June 2006 page 29-39

The following sections include a discussion of CLI commands that can be used to configure resource

parameters and monitor or reset statistics for switch resources. These commands include:

• health threshold—Configures threshold limits for input traffic (RX), output/input traffic (TX/RX),

memory usage, CPU usage, and chassis temperature. See page 29-40 for more information.

• show health threshold—Displays current health threshold settings. See page 29-41 for details.

• health interval—Configures sampling interval between health statistics checks. See page 29-42 for

more information.

• show health interval—Displays current health sampling interval, measured in seconds. See page

29-42 for details.

• show health —Displays health statistics for the switch, as percentages of total resource capacity. See

page 29-43 for more information.

• health statistics reset—Resets health statistics for the switch. See page 29-44 for details.

Configuring Resource and Temperature Thresholds

Health Monitoring software monitors threshold levels for the switch’s consumable resources—bandwidth,

RAM memory, and CPU capacity—as well as the ambient chassis temperature. When a threshold is

exceeded, the Health Monitoring feature sends a trap to the Network Management Station (NMS). A trap

is an alarm alerting the user to specific network events. In the case of health-related traps, a specific indi-

cation is given to determine which threshold has been crossed.

Note. When a resource falls back below the configured threshold, an addition trap is sent to the user. This

indicates that the resource is no longer operating beyond its configured threshold limit.

The health threshold command is used to configure threshold limits for input traffic (RX), output/input

traffic (TX/RX), memory usage, CPU usage and chassis temperature.

To configure thresholds for these resources, enter the health threshold command, followed by the input

traffic, output/input traffic, memory usage, CPU usage, or chassis temperature value, where:

rx Specifies an input traffic (RX) threshold, in percentage. This value

defines the maximum percentage of total bandwidth allowed for incom-

ing traffic only. The total bandwidth is the Ethernet port capacity of all

NI modules currently operating in the switch, in Mbps. For example, a

chassis with 48 100Base-T Ethernet ports installed has a total band-

width of 4800 Mbps. Since the default RX threshold is 80 percent, the

threshold is exceeded if the input traffic on all ports reaches 3840 Mbps

or higher.

txrx Specifies a value for the output/input traffic (TX/RX) threshold. This

value defines the maximum percentage of total bandwidth allowed for

all incoming and outgoing traffic. As with the RX threshold described

above, the total bandwidth is defined as the Ethernet port capacity for

all NI modules currently operating in the switch, in Mbps. The default

TX/RX threshold is 80 percent.

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