Network Information Table Bottom Tool Bar

The bottom tool bar in the network information table has tools for navigating through the network element data, as well as Add, Modify, and Delete buttons for performing actions on elements.

The Add, Modify, and Delete buttons behave differently, depending on which type of element you are working with; these functions are not always allowed. When they are not allowed, the buttons are grayed out. The Modify and Delete buttons become enabled when an individual element row is selected, as long as the action is allowed on that element.

The topology server (Toposerver) requires that certain conditions be met before it will allow you to delete a link or node.

• To delete a link:

  • The link’s operational status must be down. The operational status is changed to down when Toposerver receives the first LINK WITHDRAW message from NTAD.

  • The link cannot have active IS-IS or OSPF adjacencies. IS-IS and OSPF adjacencies are dropped when Toposerver receives the second LINK WITHDRAW message from NTAD.

  To delete a node:

  • The node must be isolated, meaning that all links associated with the node have been deleted (after the link deletion conditions have been met).

  • The node cannot have IS-IS, OSPF, or PCEP connections. IS-IS and OSPF adjacencies are cleared when Toposerver receives a NODE WITHDRAW message from NTAD and the PCEP session has been terminated. This workflow ensures that TED and Toposerver are synchronized.

For some elements, you can modify or delete multiple items at once (bulk modify) by Ctrl-clicking or Shift-clicking multiple line items in the table. For example, if you select multiple items in the Tunnel tab and click Modify, the Modify LSP (X LSPs) window is displayed as shown in Figure 1.

Figure 1: Modify Multiple LSPs Window

The window supports deleting the contents of a field, leaving the contents unchanged, or changing the contents to a specific value. Depending on the type of data the field contains, you can click to toggle, use the up and down arrows to select a value, or double-click to set a value. For fields where a blank value is not allowed (required fields), the option to delete is not available.

Navigation Tools

The tools in the network information table bottom tool bar are available to help you navigate through rows of data, refresh the display, and change the number of rows per loaded page. These tools are especially useful for large models with many elements.

Table 1 describes the tools in the bottom tool bar. Not all of the tools are available for all element types (node, link, interface, and so on).

Actions Available for Nodes

For nodes, Add is not a supported function. Delete is allowed as long as the prerequisites for node deletion have been met, as described earlier in this topic. Modify is allowed and is optionally used to set or change the latitude and longitude of a node, change node properties, or add IP addresses.

Figure 2 shows the Properties tab of the Modify Node window. All of the fields on this tab can be modified.

Figure 2: Properties Tab of the Modify Node Window

Figure 3 shows the Location tab of the Modify Node window. NorthStar Controller uses latitude and longitude settings to position nodes on the country map, and also to calculate distances when performing routing by distance.

Figure 3: Location Tab of the Modify Node Window

Enter latitude and longitude values using signed degrees format (DDD.dddd):

• Latitudes range from -90 to 90.

• Longitudes range from -180 to 180.

• Positive values of latitude are north of the equator; negative values (precede with a minus sign) are south of the equator.

• Positive longitudes are east of the Prime Meridian; negative values (precede with a minus sign) are west of the Prime Meridian.

Enter a site name in the Site field.

Figure 4 shows the Addresses tab of the Modify Node window.

Figure 4: Addresses Tab of the Modify Node Window

The NorthStar Controller supports using a secondary loopback address as the MPLS-TE destination address. In the Addresses tab of the Modify Node window, you have the option to add destination IP addresses in addition to the default IPv4 router ID address, and assign a descriptive tag to each. You can then specify a tag as the destination IP address when provisioning an LSP.

Click Add to create a new line where you can enter the IP address and the tag.

Click Submit to complete the node modification.

Actions Available for Links

For links, Add is not a supported function. Delete is allowed as long as the prerequisites for link deletion have been met, as described earlier in this topic. Modify is available and is primarily used in support of the Multilayer feature. Sometimes, when interlayer links are initially loaded into the model, only the source is known. In those cases, you can select Node Z (the remote node name) from the drop-down menu, and enter IP Z (the corresponding IP link end on Node Z) to manually connect the Transport Layer to the IP Layer. You can also specify the Type of the link and add your comments for reference. On the Advance tab, you can specify Delay and Admin Weight values for the link. On the User Properties tab, you can add properties not already defined. The Properties tab of the Modify Link window is shown in Figure 5.

Figure 5: Modify Link Window, Properties Tab

Actions Available for Tunnels

For tunnels, Add, Modify, and Delete are available functions for PCE-initiated tunnels. Delegated tunnels cannot be added or deleted.

Figure 6 shows the Provision LSP window.

Figure 6: Provision LSP Window

The Modify LSP window has the same data entry fields as the Provision LSP window (not all of which can be modified).

Actions Available for SRLGs

Shared Link Risk Group (SRLG) information can come from two sources:

• BGP-LS

• Transport controller

The information from these sources is merged and presented in the web UI. You can also Add, Modify, and Delete user-defined SRLGs.

Actions Available for Maintenance Events

Add, Modify, and Delete are available functions in the network information table for maintenance events. You can also reach the Add Maintenance Event window from the Applications menu in the top menu bar by navigating to Applications>Maintenance. See Maintenance Events for descriptions of the data entry fields in the Add Maintenance Event window.

The Modify Maintenance Event window contains the same fields as the Add Maintenance Event window.

Actions Available for Interfaces

Interfaces cannot be added, modified, or deleted from the network information table.

Actions Available for P2MP Groups

Add, Modify, and Delete are available functions in the network information table for P2MP groups. These functions are for P2MP groups only, not for sub-LSPs within a group. To modify or delete sub-LSPs, use the Tunnel tab.

See Provision and Manage P2MP Groups for descriptions of the data entry fields in the Add P2MP Group window.

Actions Available for Demands

The Demand tab displays:

• LDP Forwarding Equivalent Class (FEC) data compiled as a result of LDP collection tasks. These demands can be added, modified, or deleted from the network information table. Demands are never automatically deleted. See LDP Traffic Collection for information about this data.

• Demands resulting from the Netflow Collector, which you can add, modify, or delete. Demands are never automatically deleted. See Netflow Collector for more information about Netflow Collector data.