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One of the general monitoring applications within the TrafficDirector application is Protocol Monitor. It lets you generate utilization, packet rates, and kilobyte rates for predefined domains in a graphical format.
The following sections describe how to use Protocol Monitor:
You can use Protocol Monitor to gauge how closely the network activity of the protocols operating at the network layer compare with your expectations for efficient use of resources. For example, if you expect to see very little activity for the IP protocol and it appears that IP is actually one of the protocols with the highest utilization, this indicates the need for further investigation.
Protocol Monitor is a real-time graphical display application that you start from the Protocol mode. It lets you observe current network layer conditions on a network segment. Protocol Monitor can be started for an agent, agent group, roved switch port, or Frame Relay agent and associated Data Link Connection Identifiers (DLCIs), virtual local-area networks (VLANs), virtual circuits (VCs), and NetFlow interfaces.
You can use Protocol Monitor to simultaneously display activity for multiple agents to provide you with an at-a-glance comparison of network segments and see what segment has the most traffic and which has the least.
For example, start Protocol Monitor for your Ethernet segment, then start it for your Token Ring segment. Using the two displays you can compare and contrast the network traffic on each segment. If you wish to see more detailed information about the activity displayed, another good application you can start is Protocol Zoom. Or, create an Agent Group for different Ethernet segments and start Protocol Monitor to compare network utilization across different segments.
To start Protocol Monitor, follow these steps:
Step 1 Click the Protocol radio button in the TrafficDirector main window.
Step 2 Select Agent, Agent Group, Switch, or Frame Relay.
Step 3 Do one of the following:
Step 4 Select a domain group from the list under the Domain Group heading (lower portion of window).
Step 5 Click the Protocol Monitor icon.
The window applicable to the selection you made opens (Figure 22-1).
The Protocol Monitor window provides a series of display options that you can tailor to examine the statistics of greatest interest.
Table 22-1 provides a description of the different View display options available.
| This Field... | Displays This Information |
|---|---|
Utilization | Current utilization as a percentage of total available bandwidth. |
Kbyte Rate | The rate per second in kilo byte of traffic. |
Packet Rate | The rate per second in packets of traffic. |
DTE+DCE | For Frame Relay agents, Fast Ethernet full-duplex, HSSI, ATM full-duplex or WAN SwitchProbe devices, the sum of the DTE and DCE traffic. |
DTE | For Frame Relay agents, Fast Ethernet full-duplex, HSSI, ATM full-duplex or WAN SwitchProbe devices, the amount of DTE traffic. |
DCE | For Frame Relay agents, Fast Ethernet full-duplex, HSSI, ATM full-duplex or WAN SwitchProbe devices, the amount of DCE traffic. |
AVG of (DTE,DCE) | For Frame Relay agents, Fast Ethernet full-duplex, HSSI, ATM full-duplex or WAN SwitchProbe devices, the average of the traffic for both the DTE and DCE. |
MAX of (DTE,DCE) | For Frame Relay agents, Fast Ethernet full-duplex, HSSI, ATM full-duplex or WAN SwitchProbe devices, what part of the link is seeing the most traffic---DTE or DCE. |
MIN of (DTE,DCE) | For Frame Relay agents, Fast Ethernet full-duplex, HSSI, ATM full-duplex or WAN SwitchProbe devices, what part of the link is seeing the least traffic---DTE or DCE. |
You can start Scope from the Protocol Monitor window when you want to take a closer look at network activity for individual agent(s), switch port(s), Frame Relay Agent(s), or DLCIs.
To start Scope, follow these steps:
Step 1 Select Scope>Select Agent from the menu bar.
A Scope window similar to the one shown in Figure 22-2 opens.
Step 2 Select the desired agent(s) port number(s), or DLCI(s).
Step 3 Click OK.
The display in the Protocol Monitor window is based on the selections you made in Step 2. If necessary, you can use the previous and next buttons to scroll within the Scope window.
To display Protocol Monitor information, follow these steps:
Step 1 Click the Agent, Agent Group, Switch, or Frame Relay radio button in the TrafficDirector main window.
Step 2 Select a device from the list box.
Step 3 Select a domain group from the list under the Domain Group list.
Step 4 Click the Protocol Monitor icon.
The NET Protocols Protocol Monitor window opens.
From this window, you can begin to monitor your network in terms of protocol and behavior using the procedures described in this section.
You can use Protocol Monitor to monitor multiple sites by protocol. You can view selected statistics such as utilization, byte rate, and packet rate by the different protocols that make up your network traffic. With Protocol Monitor you can see the utilization of the different protocols detected on a segment.
This section also provides the following information:
Protocol Monitor displays selected network information in graphical format, providing you with an immediate overview of your network. To select the type of graphical display you want to use, select the type of display from the Format menu. The following graphical display choices are available:
To view a bar graph in inverted form, select Format>Horizontal Bar. This inverts the axes of the 2-D and 3-D bar graph displays. Depending on the data you are displaying, you can switch the x and y axes. Inverting the graph may provide a clearer picture of the data and devices you are monitoring.
In any 3-D graph, such as a bar graph or pie chart, you can change the elevation, depth, and angle of the displayed graph. This change increases or decreases the three-dimensional effect of the graph.
Step 1 Move the cursor to a free area in the three-dimensional graph.
Step 2 Do one of the following:
Step 3 Drag the cursor to manipulate the graph. When the graph is positioned the way you want it, release the mouse button(s).
With Protocol Monitor, you can monitor protocol-based samples collected by RMON2 agents or switches that you have added to the TrafficDirector application. When you choose to monitor selected data in Protocol Monitor, the TrafficDirector application polls the agents or switches you select at the intervals you specify and updates the display. The default refresh rate is one minute. You can change the interval by selecting a refresh rate from the Refresh menu.
Protocol Monitor is one of the general monitoring applications in the TrafficDirector application. Protocol Monitor gives you an excellent overview of protocol usage and distribution on a network segment, based on the agent and the domain group you selected. You can start additional applications to focus on a particular aspect of your network for more detailed monitoring or network diagnosis.
To start another application from Protocol Monitor, do one of the following:
Applications such as Protocol History and Protocol Zoom let you focus on your network and the data flowing through it for a more detailed analysis.
Although Protocol Monitor lets you monitor several types of data, you can only monitor one type of data at a time. You can, however, display several different Protocol Monitor windows and select different data types to monitor for each.
The following sections contain additional information about using independent displays:
The NET Protocols Protocol Monitor window displays the utilization and agent name by default. The viewing option you select determines how protocol information is displayed. Select an option from the View menu. Table 22-2 lists the additional display options available.
| This Option... | Displays This Information |
|---|---|
Utilization | Network utilization used by each protocol as a percentage of the total usage |
Kbyte Rate | Kilobyte rate per second |
Packet Rate | Packet rate per second |
The Protocol Monitor main window shows a 3-D vertical bar graph by default.
To change the format, follow these steps:
Step 1 To select a format option, select an option from the Format menu.
When you select a format option, the graph changes to show the information differently. Table 22-3 lists the additional formats you can choose.
Step 2 Select the format you need.
| This Option... | Displays Information in This Format |
|---|---|
2-D Bar | Two-dimensional vertical bar graph |
3-D Bar | Three-dimensional vertical bar graph |
Pie | Pie chart |
Horizontal Bar | Two-dimensional or three-dimensional horizontal bar graph |
Posted: Mon Apr 5 13:24:14 PDT 1999
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