HP OpenVMS Systems Documentation

HP OpenVMS Availability Manager User's Guide

You can display interconnect-specific LAN virtual circuit summary data by clicking the handle at the beginning of a "LAN Virtual Circuit Summary" row to a vertical position. The screen expands to display the interconnect-specific VC summary data shown in Figure 4-6.

Figure 4-6 LAN Virtual Circuit Summary Data

Much of the data in this display corresponds to the information displayed by the SCACP command SHOW VC. The SHOW CLUSTER command does not provide a corresponding display. Which data items are displayed depends on the type of interconnect the virtual circuit is using.

Currently, this feature is available only for LAN virtual circuits. VC Summary displays for other cluster interconnects such as CI might be available in the future. When other interconnects are supported, the interconnect type will be displayed at the beginning of the line---for example, CI Virtual Circuit Summary---and the associated heading will have interconnect-specific data items.

Note that LAN Virtual Circuit counters are initialized when PEDRIVER detects the existence of a PEDRIVER on a remote system. All of a LAN VC's counters are cumulative from that time.

Some of the data described in Table 4-6 is not displayed in Figure 4-6 because the screen display is wider than shown. You can scroll to the right on your terminal screen to display the remaining fields described in the table.

Table 4-6 describes the LAN Virtual Circuit Summary data items shown in Figure 4-6.

A LAN path or channel is a logical communication path between two LAN devices. Channels between nodes are determined by a local device, a remote device, and the connecting network. For example, two nodes, each having two devices, might establish four channels between the nodes. The packets that a particular LAN virtual circuit carries can be sent over any open channel connecting the two nodes.

The difference between channels and virtual circuits is that channels provide datagram service. Virtual circuits, layered on channels, provide error-free paths between nodes. Multiple channels can exist between nodes in an OpenVMS Cluster system, but only one LAN-based virtual circuit can exist between any two nodes at a time.

LAN channel counters are initialized when PEDRIVER detects the existence of a LAN device on a remote system. All of a LAN channel counters are cumulative from that time. For more information about channels and virtual circuits, see the HP OpenVMS Cluster Systems manual.

Displaying Data

You can display LAN channel summary data by clicking the handle at the beginning of a "LAN Virtual Circuit Summary Data" row (Figure 4-6), or by right-clicking a data item and choosing the Channel Summary item from the shortcut menu. The screen expands to display the LAN channel summary data shown in Figure 4-6. If there is no handle at the beginning of a "LAN Virtual Circuit Summary" data row, then managed object data collection is not enabled for this SCS node.

The data items displayed depend on the type of virtual circuit. Currently, this feature is available only for LAN virtual circuits.

Some of the data described in Table 4-7 is not displayed in Figure 4-6 because the screen display is wider than shown. You can scroll to the right on your terminal screen to display the remaining fields described in the table.

The following sections describe data that appears on lines that you can open in the Cluster Members pane (Figure 4-2).

4.3.1 LAN Device Summary Data

You can display LAN device summary data by first right-clicking a node name on the Cluster Members pane. On Version 7.3 or later nodes on which managed objects are enabled, the Availability Manager displays a menu with the following choices:

• SCA Summary
• LAN Device Summary...

Click LAN Device Summary... to display the Device Summary Data page (Figure 4-7).

Figure 4-7 LAN Device Summary Data

You can right-click any data item on the page to display a menu with LAN Device Fixes... on it. These fixes are explained in Chapter 6.

Table 4-8 describes the LAN device summary data displayed in Figure 4-7. This data is also displayed with SCACP command SHOW LAN_DEVICE.

To display LAN device detail data, right-click a LAN Path (Channel) Summary data item on the LAN Virtual Circuit Summary data page (Figure 4-6). The Availability Manager then displays the shortcut menu shown in Figure 4-8.

Figure 4-8 LAN Path (Channel) Details Menu

To display device details, select the LAN Device Details... item on the menu. After a brief delay, a LAN Device Overview Data page (Figure 4-9) is displayed.

A series of tabs at the top of the LAN Device Overview Data page indicate additional LAN device pages that you can display. Much of the LAN device detail data corresponds to data displayed by the SCACP command SHOW LAN_DEVICE.

4.3.2.1 LAN Device Overview Data

The LAN Device Overview Data page (Figure 4-9 displays LAN device summary data.

Figure 4-9 LAN Device Overview Data

Table 4-9 describes the data displayed in Figure 4-9.

The LAN Device Transmit Data page (Figure 4-10) displays LAN device transmit data.

Figure 4-10 LAN Device Transmit Data

Table 4-10 describes the data displayed in Figure 4-10.

The LAN Device Receive Data page (Figure 4-11) displays LAN device receive data.

Figure 4-11 LAN Device Receive Data

Table 4-11 describes the data displayed in Figure 4-11.

The LAN Device Events Data page (Figure 4-12) displays LAN device events data.

Figure 4-12 LAN Device Events Data

Table 4-12 describes the data displayed in Figure 4-12.