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Oracle® Enterprise Manager Metric Reference Manual
10g Release 1 (10.1)
Part No. B12015-01
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43 Beacon

You can use Oracle Enterprise Manager to view performance and availability metrics for your Beacon targets. For more information, see About Beacons in the Enterprise Manager online help.

43.1 ICMP Echo Response

This category of Beacon metrics provide you with data gathered as the result of an Internet Control Message Protocol (ICMP) ping of the target beging monitored by the Beacon.

43.1.1 Average Time (ms)

This metric represents the average time required to send an Internet Control Message Protocol (ICMP) ping to the selected host or network component and receive a valid response.

This Beacon target metric is shows up in the following locations:

  • On the Network Test page when you click Performance on the Beacon home page and then use the Test section of the page to test the connection to a host or other network component

  • In the Network Watch List on the Performance property page of the Beacon home page

  • On the Beacon Data page when you click a metric in the Network Watch List

When you add a host or other network component to the Network Watch list for a Beacon, you can set warning and critical threshold values for this metric. For more information, see Using Beacons to Monitor Network Component Availability in the Enterprise Manager online help.

43.1.1.1 Data Source

The UNIX ping command.

43.1.1.2 User Action

Use this metric to check the network response time for a particular host or other network component. For example, add a host to the Network Watch list on the Performance property page of the Beacon home page. At predefined intervals, the Beacon will ping the host and register the time it takes to receive a response from the host. If the Average Time (ms) exceeds the threshold you set when creating or editing the watch list item, an alert will be triggered.

43.1.2 Last Host

This Beacon metric represents the last node that was reached successfully by an Internet Control Message Protocol (ICMP) ping of the selected host or network component while traversing to the final destination.

This Beacon target metric is shows up in the following locations:

  • On the Test Response page, which you display when you test a selected item in the Network Watch List by clicking Test Response on the Beacon Performance page.

  • On the Beacon Data page when you click a metric in the Network Watch List; on this page the metric is referred to as the Last Successful Host.

43.1.2.1 Data Source

The UNIX ping command.

43.1.2.2 User Action

If the last host is not your destination node, there may be an indication that problems may exist between the last host and the destination node.

43.1.3 Number of Hops

This Beacon target metric represents the number of network nodes traversed by the Internet Control Message Protocol (ICMP) ping of the selected host or network component.

This Beacon target metric is shows up in the following locations:

  • On the Network Test page when you click Performance on the Beacon home page and then use the Test section of the page to test the connection to a host or other network component

  • In the Network Watch List on the Performance property page of the Beacon home page

  • On the Beacon Data page when you click a metric in the Network Watch List

When you add a host or other network component to the Network Watchlist for a Beacon, you can set warning and critical threshold values for this metric. For more information, see Using Beacons to Monitor Network Component Availability in the Enterprise Manager online help.

43.1.3.1 Data Source

The UNIX ping command.

43.1.3.2 User Action

Specific to your site.

43.1.4 Packets Dropped (%)

This metric represents the percentage of packets that could not reach its destination during an Internet Control Message Protocol (ICMP) ping of the selected host or other network component.

This Beacon target metric is shows up in the following locations:

  • On the Network Test page when you click Performance on the Beacon home page and then use the Test section of the page to test the connection to a host or other network component

  • In the Network Watch List on the Performance property page of the Beacon home page

  • On the Beacon Data page when you click a metric in the Network Watch List

When you add a host or other network component to the Network Watchlist for a Beacon, you can set warning and critical threshold values for this metric. For more information, see Using Beacons to Monitor Network Component Availability in the Enterprise Manager online help.

43.1.4.1 Data Source

The UNIX ping command.

43.1.4.2 User Action

A high percentage of dropped packets can indicate a poor network connection. Click the value of the metric in the Network Watch List to display a chart that shows the performance of the metric over time. This can help you identify whether the connection issues are persistent or only intermittent.

43.1.5 Status

This metric indicates whether or not an Internet Control Message Protocol (ICMP) ping of the selected host or other network component was successful.

This Beacon target metric is shows up in the following locations:

  • On the Network Test page when you click Performance on the Beacon home page and then use the Test section of the page to test the connection to a host or other network component

  • In the Network Watch List on the Performance property page of the Beacon home page

  • On the Beacon Data page when you click a metric in the Network Watch List

When you add a host or other network component to the Network Watch list for a Beacon, you can set warning and critical threshold values for this metric. For more information, see Using Beacons to Monitor Network Component Availability in the Enterprise Manager online help.

43.1.5.1 Data Source

The UNIX ping command.

43.1.5.2 User Action

Use this metric to determine the availability of a specific host or other IP component on your network.

43.2 HTTP Response

This category of Beacon metrics provides you with HTTP response data.

43.2.1 Intermediate Host IP

This metric represents the IP address of all the nodes traversed in order to reach a destination.

43.2.1.1 Data Source

The UNIX traceroute command.

43.2.1.2 User Action

Specific to your site.

43.2.2 Intermediate Host Name

This metric represents the name of all nodes traversed to reach its destination.

43.2.2.1 Data Source

The UNIX traceroute command.

43.2.2.2 User Action

Specific to your site.

43.2.3 Packet Number

This metric represents the number that identifies a packet in a traceroute.

43.2.3.1 Data Source

The UNIX traceroute command.

43.2.3.2 User Action

Specific to your site.

43.2.4 Round Trip Time

This metric represents the time taken to traverse from the originating node to the destionation node and back.

43.2.4.1 Data Source

The UNIX traceroute command.

43.2.4.2 User Action

Specific to your site.

43.2.5 Time To Live

This metric represents the maximum number of hops to traverse before declaring an unsuccessful attempt to reach the destination node.

43.2.5.1 Data Source

The UNIX traceroute command.

43.2.5.2 User Action

Specific to your site.