In Grid Manager, you use the Net Map (network map) and List panels to manage your IPv4 network infrastructure. After you select a network container from the IPAM tab, Grid Manager displays it in the Net Map panel, by default. The Net Map panel provides a graphical view of your networks and has a number of features that simplify network management. The List panel displays the networks in table format.
You can always switch your view of a network container between the Net Map and List panels. Grid Manager keeps track of which panel you last used. When you select a network container, Grid Manager displays it in the Net Map or List panel, depending on which one you last used. For information about each panel, see IPv4 Network Map on page 607 and IPAM Home.
Use the IP Map and List panels to manage the IP addresses in leaf networks. For information, see Viewing and Managing IPv4 Addresses.
After you create an IPv4 network, you can modify its properties, resize it, use the split network feature to create subnets, enable discovery to discover routers, switches, firewalls, wireless access points and other device types within it, or join it to another network to create a larger network that encompasses adjacent subnets. You can do the following from both the Net Map and List panels:
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IPv4 Network
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- Right-click and select Zoom In, or click the Zoom In icon in the Net Map task bar. The pointer changes to the zoom in selector.
- Select a starting point and drag to the end point. The starting point can be anywhere in the map. It does not have to be at the beginning of a network.
Net Map displays a magnified view of the selected area after you release the mouse button. As you mouse over the zoomed in area, Net Map displays IP information about it. - You can do the following:
- Select an area and zoom in again.
- Add a network. If you zoom in on an area and click Add without selecting an open area first, Net Map selects the area where it can create the biggest possible network in that magnified area.
- Select a network and perform any of the following operations:
- Split the network.
- Join it to another network.
- Resize the network.
- Edit its properties.
- Open it to display its network or IP map.
- Right-click and select Zoom Out, or click the Zoom Out icon in the Net Map task bar. Each time you click Zoom Out, Net Map zooms out one level and the Zoom Controller is updated accordingly.
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- Zoom in on specific areas, as described in Zooming In and Out.
- Add a network, as described in Adding a Network from Net Map.
- Select a network and view either its network or Net Map, as described in Viewing Network Details.
- Select a network and edit its properties, as described in Modifying IPv4 and IPv6 Network Containers and Networks.
- Split a network, as described in Splitting IPv4 Networks into Subnets.
- Join networks, as described in Joining IPv4 Networks.
- Resize a network, as described in Resizing IPv4 Networks.
- (Applies only with Network Insight) Execute vDiscovery on the selected network, as described in Configuring vDiscovery Jobs.
- (Applies only with Network Insight) View Discovery Status for the selected network, as described in Viewing Discovery Status.
- (Applies only with Network Insight) Execute Discovery Diagnostics on the selected network, as described in Executing Discovery Diagnostics
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- (Applies only with Network Insight) Direct NIOS to discover devices on the selected network (Discover Now). The network must have discovery enabled before this button will be active. For more information about requirements and discovery features, see the topics under About Network Insight.
Note: If the Discover Now button and other associated discovery elements are disabled on the Toolbar, it indicates that discovery is not enabled for the parent network of the selected network or IP, or the network is not associated with a discovery appliance.
Delete one or multiple networks, as described in Discovering Networks (Under Network Insight only) on page 614- .
- Clear All Unmanaged Data or Clear All Discovered Data, as described in the section Clearing Discovered Data onpage 672.
- Switch to the List view of the network. For information, see IPAM Home.
- When you select one or more networks in Net Map and then switch to the List view, the list displays the page with the first selected network.
- If you select one or more networks in the List view and then switch to the Net Map view, the first network is also selected in Net Map. If you select a network in the List view that is part of a Multiple Networks block in Net Map, it is not selected when you switch to the Net Map view.
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- Do one of the following:
- Click the Add icon.
Net Map displays the netmask slider and outlines the open area that can accommodate the largest network. - Select an open area, and then click the Add icon.
Net Map displays the netmask slider and outlines the largest network that you can create in the open area that you selected.
- Move the slider to the desired netmask. You can move the slider to the netmask of the largest network that can be created in the open area.
As you move the slider, Net Map displays the netmask and its corresponding number of IP addresses. The outline in the network map also adjusts as you move the slider. When you mouse over the outline, it displays the start and end address of the network. - After you set the slider to the desired netmask, you can drag the new network block around the open area to select a new valid starting address. You cannot move the block to a starting address that is invalid.
- Click Launch Wizard to create the network.
The Add Network wizard displays the selected network address and netmask. - You can add comments, automatically create reverse mapping zones, and edit the extensible attributes. (For information, see Adding IPv4 Networks167.) You cannot change the network address and netmask.
- Save the configuration and click Restart if it appears at the top of the screen. Grid Manager updates Net Map with the newly created network.
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Viewing Network Details
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- Network: The network address.
- Comment: The information you entered about the network.
- RIR Organization: This appears only if support for RIR updates is enabled. This displays the name of the RIR organization to which the network is assigned.
- RIR Organization ID: This appears only if support for RIR updates is enabled. This displays the ID of the RIR organization to which the network is assigned.
- RIR Registration Status: This appears only if support for RIR update is enabled. This field displays the RIR registration status. This can be Registered or Not Registered. Registered indicates that the network has a corresponding entry in the RIPE database.
- Last Registration Updated: Displays the timestamp when the last registration was updated. The displayed timestamp reflects the timestamp used on the Grid Master.
- Status of Last Registration Update: Displays the registration status and communication method of the last registration update. The status can be Pending, Sent, Succeeded, or Failed. Each time you send a registration update to create, modify, or delete a network container or network, the updated status will be displayed here. If you have selected not to send registration updates, the previous status is retained.
- IPAM Utilization: For a network, this is the percentage based on the IP addresses in use divided by the total addresses in the network. For example, in a /24 network, if there are 25 static IP addresses defined and a DHCP range that includes 100 addresses, the total number of IP addresses in use is 125. Of the possible 256 addresses in the network, the IPAM utilization is about 50% for this network.
For a network container that contains subnets, this is the percentage of the total address space defined within the container regardless of whether any of the IP addresses in the subnets are in use. For example, when you define a /16 network and then 64 /24 networks underneath it, the /16 network container is considered 25% utilized even when none of the IP addresses in the /24 networks is in use.
You can use this information to verify if there is a sufficient number of available addresses in a network. The appliance updates the IPAM utilization data immediately for a network container, but for a network it is updated every 15 minutes.
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- The IPAM utilization data is displayed in one of the following colors:
- Red: The IPAM utilization percentage is above the configured Trigger value.
- Blue: The IPAM utilization percentage is below the configured Trigger value.
- Active Users: The number of active users on the selected network.
- Discovery Engine: Displays the discovery engine that performs the discovery process. This can be Network Insight, NetMRI, or vDiscovery. This field displays None if you have added or imported the network container or network manually.
- Site: The site to which the IP address belongs. This is a predefined extensible attribute. You can select the following columns for display:
- Disabled: Indicates whether the network is disabled.
- Leaf Network: Indicates whether the network is a leaf network or not. A leaf network is a network that does not contain other networks.
- Discovery Enabled: (Applies only with Network Insight) Indicates whether discovery is allowed on the network container or the network.
- Discover Now: (Applies only with Network Insight) Indicates when the network is undergoing a current discovery process. A "Pending" icon appears in this column when you start the discovery and displays Completed after the completion of the discovery process.
- VLAN Name: (Applies only with Network Insight) The VLAN name on the switch port.
- VLAN ID: (Applies only with Network Insight) The VLAN ID on the switch port.
- Managed: (Applies only with Network Insight) Indicates whether the network is set to Managed status under Grid Manager. For more information, see the section Converting Unmanaged Networks under IPAM to Managed Status.
- First Discovered: (Applies only with Network Insight) The date and timestamp of the first occasion that Grid Manager discovered the network.
- Last Discovered: (Applies only with Network Insight) The date and timestamp of the last occasion that Grid Manager performed discovery on the network. The timestamp is updated whenever any new IP from this network is discovered.
- Extensible attributes and RIR attributes: You can select the extensible attributes such as Building, Country, Region, State, and VLAN for display. When you enable support for RIR registration updates, you can also select associated RIR attributes for display. For information about RIR attributes, see Managing RIR Attributes on page 582.
- Active Directory Sites: You can also select Active Directory Sites for display. For information about Active Directory Sites, see About Active Directory Sites and Services.
You can sort the list of networks in ascending or descending order by columns. For information about customizing tables in Grid Manager, see Customizing Tables.
You can also modify some of the data in the table. Double click a row of data, and either edit the data in the field or select an item from a drop-down list. Note that some fields are read-only. For more information about this feature, see Modifying Data in Tables.
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Tip: If you select a network from the list and switch to the Net Map panel, the network is also selected in the network map.
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Filtering the Network List
You can filter the network list, so it displays only the networks you need. You can filter the list based on certain parameters, such as network addresses, comments and extensible attributes. When you expand the list of available fields you can use for the filter, note that the extensible attributes are those with a gray background. 
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Managing IPv4 Networks
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Resizing IPv4 Networks
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- From the Net Map or List panel, select the check box of a network, and then click Split from the Toolbar.
- In the Split Network editor, do the following:
- Address: Displays the network address. You cannot modify this field.
- Netmask: Displays the netmask of the network. You cannot modify this field.
- Subnetworks: Displays the number of subnets and IP addresses for each subnet.
- Split network slider: Use the split network slider to specify the appropriate subnet masks for each subnet. When you move the slider, Grid Manager displays the number of subnets and the IP address range within that subnet.
- Immediately Add: Select one of the following options.
- Only networks with ranges and fixed addresses and unmanaged: Adds only the networks that have DHCP ranges, fixed addresses, and unmanaged addresses.
- All possible networks: Adds all networks that are within the selected netmasks. The is enabled only when you split the /8 networks to /9 or /16 networks.
Note that when you add a large number of networks, it could take a little longer for Grid Manager to display the networks.
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- Automatically create reverse-mapping zone: Select this check box to have the appliance automatically create reverse-mapping zones for the subnets.
- Click OK.
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Note: If the Discover Now button and other associated discovery elements are disabled on the Toolbar, it indicates that discovery is not enabled for the parent network of the selected network or IP, or that a discovery appliance (known as a Probe) is not associated with the network that you wish to discover.
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To discover IPv4 or IPv6 networks:
1. From the Net Map or List panel, select a network, and then click Discover Now from the Toolbar. NIOS asks you to confirm that you wish to launch discovery on the selected network.
In the Net Map panel, you can click on IP addresses in the network being discovered. As new data becomes available, NIOS updates the Discovered Data section of the panel with any information found on the device associated with the selected IP.
For more information about requirements and discovery features, see the topics under About Network Insight on page 678.
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Viewing and Managing IPv4 Addresses
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- From the Data Management tab, select the IPAM tab -> network check box. You can select multiple check boxes for multiple networks.
- Select Delete or Schedule Delete from the Delete drop-down menu.
- To delete the network now, in the Delete Confirmation dialog box, click Yes. To schedule a deletion, see About Extensible Attributes.
The appliance puts the deleted network in the Recycle Bin, if enabled.
