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This chapter provides the following topics:
The Network Topology window presents a graphical, topological map view of devices, the links between them, and the active alarms on elements in the map. It also enables you to visualize circuits/VCs within the displayed topology map. In addition, the Network Topology window provides access to map element tools and functions, and allows you to drill-down to get detailed information about map elements.
The Network Topology window is accessed from the left sidebar (Create Groups of Devices for Easier Management and Configuration for more information. )
). The content of the Network Topology window is determined by the device group you have selected. To select a device group, click the Device Groups button from the toolbar, then use the Device Groups panel to select a group. (From the Device Groups panel you can access the central device grouping functionality to create new groups, add devices to groups, and so on. SeeEach Network Topology map is divided into a left pane that contains alarms/circuits/VCs/links information, and a right pane that displays the map itself. From the left pane, use the toolbar to control the spacing of both panes. For example, if you select 100%, only the map will be shown. If you select 50%, the map and the left pane will share the screen equally. When the left pane is expanded, additional columns might be added to the tables in the tabs.
Topology map (right pane)—Displays the topology of the selected device group in graphical form. It displays the group’s devices and sub-groups (if any) and the links between them (Physical, Ethernet, and technology-specific links). It also displays the active alarms on the devices or links so that you can easily identify problems in the network. You can drill down from the topology map to detailed information about a device or link in order to troubleshoot problems. The topology map can be customized, filtered, and manipulated to show exactly the information you need.
You can toggle between the network topology map and the geographical map using the toggle buttons in the top right corner of the map.
From the Network Topology window, you can access extended tables that list and provide more information about the alarms, network interfaces, circuits/VCs and links in the selected device group. These extended tables open in a separate browser window.
The tables accessed from the Network Topology window contain information for the selected device group only. You can access a full list of all alarms/circuits/network interfaces/links in the system by selecting
and then selecting the required table (links, network interfaces, and so on).To open the extended details tables, click the Detach icon in the top right corner of the tab or click on the hyperlink at the bottom of a specific tab, for example, click on the Alarms Table link at the bottom of the Alarms tab.
The window displaying the extended tables has these tabs: Alarms, Circuits/VCs, Network Interfaces, and Links.
Be aware of the following when working with the extended tables:
Click the Export icon at the top right of the table to export the data from the table to a file (either PDF or CSV format). Export is available for alarms, circuits/VCs and network interfaces.
Note | If the table contains more than 1000 rows, you will not be able to export the data. |
You can also filter the data to find specific alarms, circuits/VCs, network interfaces, or links using a quick filter or an advanced filter from the Show drop-down list. The quick filter narrows the content that is displayed in a column according to the text you enter above the column. The advanced filter allows you to narrow down the data in a table by applying a filter using multiple operators such as Does not contain, Does not equal, Ends with, Is empty, and so on. You can also create a user defined filter which, if saved, will be added to the Show drop-down menu.
To create and save a user defined filter:
The topology map enables you to visualize the topology of a selected device group, which might cover a specific network segment, a customer network, or any other combination of network elements. To determine what is displayed in the topology map, you must click on the Device Groups button in the left pane and select a device group. Since grouping is hierarchical, a group might be a “parent group,” meaning that it contains sub-groups. If the selected group contains sub-groups, icons representing the sub-groups are shown in the topology map and these can be expanded to display the devices within them.
After you have displayed the required group in the topology map, you can access additional information about any device or link. See Get More Information About Devicesand .
The topology map only displays devices for which the logged in user has access privileges, based on the virtual domains to which the user has been assigned.
Note | If you encounter topology issues, such as topology components not rendering as expected or component data not being displaying on the map, we recommend that you clear your browser cache and try again. |
To display network elements in the topology map:
You can expand a sub-group to show its contents within the current context or you can drill down to see the contents of the sub-group independently of the current map context.
Note | When expanding sub-groups, be aware that if a device belongs to more than one group, the device will appear in one of the expanded groups only. It will not appear in all of the groups to which it belongs. If your setup has devices that belong to multiple groups, rather view the groups individually in the topology map by selecting them in the Device Groups pane. This will ensure that you will always see all the devices that belong to a specific group. |
To view the contents of a sub-group:
You can display devices and networks that are not managed by the system on the topology map and on the geo map by adding them manually.
Step 1 | In the topology toolbar, choose Create > Create Unmanaged Device or Create > Create Unmanaged Network. |
Step 2 | Click on the map to add the device/network to the map. |
Step 3 | Click on the
newly-added device/network in the map. From the displayed panel, you can add
the device/network to a group, rename the device/network, or delete the
device/network.
After you have added a device or network to the topology map, it will also be available in the geo map. The unmanaged device will appear in the list of unmapped devices and you can set its location. See Place Unmapped Devices on the Geo Map. |
Unmanaged links: For visualization purposes only. If you know that two devices are connected but you do not need full management of the link between them, you can add an unmanaged link to the map. The link will appear as a grey dashed line.
Managed links: When you add a managed link, it is saved to the database and is included in all links tables. It is shown on the map as a solid line, the same as all other managed links. Cisco EPN Manager retrieves the link status from the managed device interfaces to which it is connected. The discovery status of a manually added managed link will be "Pre-provisioned." This indicates that it was not discovered by the system.
To manually add a link between two devices:
To delete a manually added managed link:
You can choose to display only certain types of links or devices in the network topology map. Click the Show button and select Links or Device Families to see a full list of link and device types and select the ones you want to display.
Note | Link/device type filters are disabled when you select a specific circuit/VC to display on the map. |
Step 1 | In the left sidebar, choose . |
Step 2 | Click on the Device Groups button and select the required device group. |
Step 3 | Click Show in the topology toolbar and choose Links or Device Families. |
Step 4 | In the Links
dialog:
|
Step 5 | In the Show
Device Families dialog:
|
You can choose to hide the device name labels and you can hide alarms altogether or you can display alarms of specific severities only.
In cases where a topology map is displaying thousands of devices, you might want to focus on specific devices or sets of devices. The Overview pane shows you the entire topology map in miniature and lets you select the area you want to display in the large topology map. It also provides an at-a-glance view of the alarm status of the elements in the topology map.
From the topology map, you can drill down to get more information about a device.
Step 1 | Click on the required device in the topology map. A popup appears showing basic device information and alarm information for the device. |
Step 2 | Click
View 360
to access the Device 360 view for detailed information about the
device.
For more information, see, Get Basic Device Information: Device 360 View. |
Cisco EPN Manager provides a variety of ways that you can view links and get more details about them:
To view link information for: |
See the procedures in: |
A specific link |
|
A specific link in a topology map |
|
A group in a topology map |
|
All of Cisco EPN Manager |
The Link 360 view gives you a quick look at the configuration and status of a device's links. Each Link 360 view provides information about the A- and Z-sides of the link (type, direction, capacity, and so forth). Depending on the link and device type, it also provides a wide range of metrics, such as power level, span loss, and bit errors.
You can launch the Link 360 view by clicking the "i" next to a link name in any of the link tables. This includes the tables that are opened by clicking Links Table in a topology map, or by choosing .
The Link 360 view provides general link and performance information at the top of the view, and more detailed link information in tabs in the lower part of the view.
Information Provided in Link 360 View |
Description |
General information |
The link name, serviceability status, highest severity alarm, type, direction, capacity, and utilization. Definitions of link serviceability states are provided in Link Serviceability States. If the link you are viewing is an OTS or OTU link, you can click the Utilization field's i (information) icon to open the Used Wavelengths pop-up window, which lists the optical channels configured on the link and the circuits that are currently using those channels. |
Performance data |
Graphs or charts reflecting various aspects of link performance. |
Alarms |
Current alarms for the link, including their severity, status, the time they were generated, the source of the alarm, and the alarm's ID. Also provides a launch point for the Alarm Browser. |
Links |
(LAGs only) Status, name, and IP address for the A-side and Z-side port in the Link Aggregation Group. |
Endpoints |
Devices and interfaces that serve as endpoints for the link. Also provides a launch point for the Interface 360 view. |
Circuit/VCs |
(For a circuit/VC that traverses the link) Circuit/VC name, type, customer, status, and creation date. Also provides a launch point for the Circuit/VC 360 view. |
SRRGs |
Lists the Shared Risk Resource Groups (SRRGs) assigned to the link or to the link endpoint devices. For each listed SRRG, you can see whether it is the default SRRG on the link/device or if it has been assigned to the link/device. For more information about SRRGs, see View and Manage Shared Risk Resource Groups (SRRG) in the Geo Map. |
Link Serviceability States
Serviceability State |
Icon |
Description |
Admin Down |
Link was purposefully shut down by administrator. |
|
Down |
Link is down (but it should not be). |
|
Up |
Link is up and traffic is passing through the link. |
|
Auto Up |
Link is up because it detected a signal (this state is only supported by optical devices) |
|
Unavailable |
Link is not discovered by yet or the status is unavailable. |
|
Partial |
|
You can select a specific link from the following pages and view the link in the topology map:
Cisco EPN Manager uses the following conventions to represent links on a topology map:
A solid line represents any type of discovered link between two elements in the topology map.
A dotted line represents an unmanaged link that was manually drawn in the topology.
(If enabled in the Show > Links menu) A dot-dash line represents an aggregated link.
If an alarm severity badge is displayed on a link, it represents the most severe alarm that is affecting the link.
To get more information about links in a topology map, click the link to display a popup window with link information, including link type, the link's A- and Z-side devices and interfaces, and link utilization. For aggregated links, the popup window lists all the underlying links, as in the following example:
Cisco EPN Manager provides a table that lists all of the links that it is managing. This provides a quick way to locate all links of a specific type or with a name that shares a common string. You can also identify links that have severe alarms, and launch Interface 360 views for view the affected sides.
The table also provides a quick look at link utilization and capacity.
In the topology map and in the geo map, you can enable visualization of the bandwidth utilization for OTS, OTN, and ODU links over which circuits are provisioned. In this way, you can easily identify when a link is over-utilized or approaching over-utilization. Bandwidth utilization is supported for one link type at a time.
When enabled:
A thicker link is shown in the map and is colored based on the percentage of total bandwidth currently being used by provisioned circuits on the link. The legend at the bottom of the topology map shows the color representations for the bandwidth utilization. The thresholds for bandwidth utilization coloring can be set up in Administration > Settings > System Settings > Maps > Bandwidth Utilization. See .
Bandwidth utilization data is provided in all link-related views, for example, the Link panel that is displayed when you click on a link, Links tables, the Link 360, and so on.
Tables of links have Utilization and Capacity columns. The Utilization column shows the actual usage data (for example, number of channels for OTS links) plus the percentage of total capacity. The Capacity column shows the total bandwidth capacity of the link.
Bandwidth utilization is calculated as follows:
For OTS links, bandwidth utilization is calculated in terms of the number of 50Ghz ITU grid channels currently being used. Click on the i icon in the Utilization column to see details of exactly which channels are being used and which circuits are using the channels.
For OTN and ODU links, bandwidth utilization is calculated based on the number of ODU0 timeslots reserved and is represented in gigabits per second.
To enable visualization of bandwidth utilization:
In the topology map, the links of the selected type will appear thicker and will be colored based on the bandwidth utilization of the link.
When bandwidth utilization visualization is enabled, links in the map are colored based on the percentage of total bandwidth currently utilized on the link. See Show Bandwidth Utilization for Links. Default thresholds are defined by the system, however, you can define your own thresholds to determine how bandwidth utilization will be reflected on the links.
To define color thresholds:
If you enable bandwidth utilization visualization in your map, the links will be colored according to these thresholds.
If a device or link has an alarm associated with it, an alarm badge is displayed on the device icon or on the link in the topology map. The color of the alarm badge corresponds with the alarm severity—minor (yellow), major (orange), or critical (red)—and matches the alarms displayed in the Alarm Browser.
For groups, the alarm badge represents the most severe alarm that is currently active for any of the group members.
Link-related alarms, such as Link Down, generate an alarm badge on the relevant link in the topology map. After the link up alarm is received, the link alarms and corresponding badges are cleared.
See Alarm Severity Icons for more information.
You can specify how the devices and other network elements (such as labels, nodes, and the connections between them) are arranged in the topology map:
When you choose a map layout, the elements align accordingly. You can also drag and drop elements to change the layout manually. After you have changed the layout, you can save it so that it will be preserved when you next open the Network Topology window. See Save the Layout of a Network Topology Map for Future Web GUI Sessions.
Note | If you are using geo maps, devices in the topology map will initially be positioned according to their GPS coordinates. You can reposition the devices as required and then save the layout. See View Your Network on a Geographical Map (Geo Map) for more information about geo maps. |
Note | The layout is saved for the selected device group only. |
Choose
from the Topology toolbar. You can reload the layout at any time by choosing .If you want to return to the default system layout after you have saved your manual layout, you must delete the manual layout. Choose
.A background image can be applied to the topology map for any selected group. This is useful if, for example, you want to group your network according to geographic location. A sub-group can have a different image from its parent group. For example, you could apply a country map to one group and state maps to its sub-groups. Background images are saved per group and per user.
When a background image is applied, zoom functionality is supported and devices maintain their location on the image as you zoom in and zoom out.
The system provides some predefined images that you can select as background images. Alternatively, you can use your own custom background images.
When adding a custom background image, follow these guidelines:
When working with circuits/VCs, it is very useful to see how a circuit/VC is deployed within the existing network topology. Cisco EPN Manager overlays the circuit/VC on an existing topology map, clearly indicating the endpoints and midpoints of the circuit/VC, the role of the endpoint (where relevant), and relevant fault information for the circuit/VC. If the selected group does not contain all the devices participating in the circuit/VC, a popup is displayed asking if you want to switch groups to show the full overlay. See View and Manage Discovered/Provisioned Circuits/VCs for more information.
For optical and CEM circuits, you can display routes associated with a specific circuit.
To do this use the Routes drop-down menu in the topology toolbar. The Routes menu calculates the routes from the links within a service. You can also see more data about the circuit routes. For example, the working path is represented with a ‘W’ label and the Protected path with a ‘P’ label on the links. See Display the Routes Associated With a Circuit.
You can do a full multi-layer trace of a circuit from the Network Topology window. See Trace and Visualize the Full Route of Circuits/VCs for more information.
If Synchronous Ethernet (Sync-E) or Precision Time Protocol (PTP) clock synchronization is configured on the devices in your network, you can visualize the clock synchronization network on the topology map.
The Sync-E overlay shows the topology and hierarchy of the sync-E network, including the primary clock and the primary and secondary clock inputs for each device. This allows the clock signal to be traced from any Sync-E enabled device to the primary clock or from the primary clock to a Sync-E enabled device.
The PTP overlay shows the clock synchronization tree topology, the PTP hierarchy, and the clock role of each device in the tree - master, boundary, slave, or transparent.
If BGP or OSPF routing processes are used in your network, you can display an overlay of the routing network on the map.
The OSPF overlay shows the different OSPF domains in the network and the links between them, which are labeled as inter-area OSPF links. The overlay shows the OSPF area ID to which each link belongs and the role of each router, for example, Area Border Router (ABR), Designated Router (DR), and so on.
The BGP overlay labels each device with the ID of the autonomous system to which it belongs and shows the links within and between autonomous systems. If two connected routers belong to the same autonomous system, the link is an internal BGP link. If they belong to different autonomous systems, the link is marked as an external link. Each unique autonomous system has a different color so that you can easily identify devices belonging to the same AS. The overlay also marks the devices that serve as route reflectors or route clients.
Note | The overlay is supported on the following device families. Please refer to the Cisco Evolved Programmable Network Manager Supported Devicesto see which devices are supported by the product. |
Step 1 | In the left sidebar, choose . | ||
Step 2 | Click on the Device Groups button and select the required device group. | ||
Step 3 | Click Show in the topology toolbar and choose Technology. Click the question mark icon for a description of what will be displayed on the map for each technology. | ||
Step 4 | Select
OSPF or
BGP and click
OK.
|
You can save the entire topology map or selected objects from the topology map as an image file. This will enable you to store copies of the topology map in a specific state which you can use as a point of reference in the future when multiple changes are made to the topology.
To save the topology map as an image file:
Step 1 | Choose . |
Step 2 | Click on the Device Groups button and select the required device group. |
Step 3 | Make content and layout changes to the topology map as required. |
Step 4 | Click the Save Image icon in the topology toolbar. |
Step 5 | In the Save As Image dialog box, select the file type for the saved image. |
Step 6 | Choose whether you want to save the entire topology or only the items currently selected in the topology map. |
Step 7 | Choose a size setting for the image file. |
Step 8 | Click OK. The image is saved in your local Temp folder. |
The geo map enables you to position your network devices on a world map and monitor them within their geographical context. The displayed world map is either imported by accessing the map provider's site over the Internet (online mode) or from locally installed map resources (offline mode).
Note | When working with the geo map in online mode, a connection to the Internet is required from each client or from the Cisco EPN Manager server if it is being used as a proxy. |
The geo map is accessed via the topology map. To open the geo map:
About the geo map:
In addition to individual devices, the geo map shows device groups that have a defined location, for example, devices in a building at a specific address.
Take the following into consideration when viewing groups in the geo map:
Only location-type device groups can be shown in the geo map, and they are only visible if they have a defined geographical location. The location is defined in the device group properties. To create or edit a location device group and define the geographical location of the group, go to Inventory > Group Management > Network Device Groups. See Create Location Groups for more information.
Group members inherit the location of the group.
If a group's location is the same as other devices/groups, it will be included in a cluster. The number displayed on the cluster icon represents the total number of devices in the cluster (including devices contained in groups).
If there are alarms on any of the devices within a group, the highest severity alarm icon will be displayed on the device group icon.
Click on the location group icon to see a panel containing information about the group, including its name, GPS coordinates, and alarm information. Click on the Show Members link in the panel to show a list of the devices and sub-groups that belong to the group.
If a group member device is given a geographical location, the device will be shown on the geo map as an individual device and alarms will be shown on the device itself, not on the group. It is preferable to have all devices in a geographical location group inherit the GPS coordinates of the group in order to retain the significance of the group's location.
The system is set up by default to get the map tiles from a specific Mapbox URL through a direct Internet connection from the client or via the EPN Manager server which acts as a proxy. If required, you can use a different map tiles provider by providing a specific URL. Both of these options require an Internet connection. If you do not have an Internet connection, you can install the map resources locally and specify that you want the system to use the local map resources, which means that you are effectively working in offline mode.
The geo map setup can be managed in the System Settings. In the left navigation pane, select
.In the Network Topology page, you can do the following:
For any selected device group, only the devices that are defined with GPS coordinates will automatically be shown on the geo map. When you switch to the geo map or when you select a different device group, a popup message will indicate how many unmapped devices there are, meaning how many devices that do not have coordinates and therefore do not appear on the map.
To identify which devices are not being shown on the geo map, click the Unmapped Devices button above the map.
You can either drag and drop unmapped devices onto the required location on the geo map or you can specify the GPS coordinates to define the device’s location on the geo map.
Degrees and decimal minutes (DMM): 41 24.2028, 2 10.4418
Decimal degrees (DD): 41.40338, 2.17403
Degrees, minutes, and seconds (DMS): 41°24'12.2""N 2°10'26.5""E
Note | When using DMS format, please use a double quotation mark ("") to indicate the seconds. |
To place unmapped devices on the geo map:
Step 1 | In the left sidebar, select | ||
Step 2 | Click on the Geographical Map toggle button in the top right corner of the map. | ||
Step 3 | Click the Unmapped Devices button above the map. | ||
Step 4 | In the Unmapped
Devices panel on the right, either:
|
If you have many devices to place on the map, it might be more convenient to define the coordinates externally in a .csv file and then import the file. The devices will be placed on the map according to the coordinates you specified and the unmapped devices list will be updated accordingly.
Note | When using DMS format, please use a double quotation mark ("") to indicate the seconds. |
You can start from scratch with a blank .csv template that you can download from the geo map, or you can export the locations of the devices in the selected device group, specify the device coordinates, and then import the updated .csv file.
To set the location of devices in bulk:
Step 1 | In the geo map, click the Export Locations icon in the toolbar. A .csv file with the default name of DeviceLocationExport.csv is downloaded to your hard drive. |
Step 2 | Open the .csv file. The file lists the IP address of all the devices in the selected device group, including those that are already shown on the geo map, as well as unmapped devices. For mapped devices, the coordinates are displayed in the Latitude and Longitude columns and can be changed as required. For unmapped devices, the Latitude and Longitude columns are blank and you can fill in the coordinates. |
Step 3 | Save your updated .csv file. |
Step 4 | Click the Import Locations icon in the toolbar. |
Step 5 | Browse to the location of your updated .csv file and click Place Devices. The devices will be placed in the locations you specified. Devices that were previously unmapped will be removed from the Unmapped Devices list. |
To move a device to a different location on the geo map, you need to open the Edit Location dialog and then either drag the device to the required location on the map or set the coordinates manually. If the device is in a cluster, you must open the cluster to view the devices and then change the location of the device.
Note | When using DMS format, please use a double quotation mark ("") to indicate the seconds. |
To change the location of a device:
Devices that are very close to each other in location are grouped in a cluster on the geo map. You can change the location of one or more of the devices in the cluster. The device will be removed from the cluster and will appear on the geo map as an individual device.
To change the location of a device in a cluster:
Step 1 | Click on the cluster in the geo map. A popup appears showing basic information for the cluster. |
Step 2 | Click Show Devices. A panel is displayed to the right of the map and lists all the devices in the cluster. |
Step 3 | In the panel on
the right, either:
The device(s) will be removed from the cluster and placed in the specified location on the map. |
If you no longer want to display a device on the geo map, you can remove it. The removed device will appear in the Unmapped Devices list.
To remove a device from the geo map:
Devices within clusters can be removed from the geo map. You can remove an individual clustered device or you can remove multiple devices in the same cluster at one time. The removed device(s) will appear in the Unmapped Devices list.
To remove clustered devices from the geo map:
Step 1 | Click on the cluster containing the device(s) you want to remove. A popup appears showing basic device information and alarm information for the device. |
Step 2 | Click Show Devices. A list of the devices contained in the cluster is displayed. |
Step 3 | Select the device(s) you want to remove. |
Step 4 | Click Set Location. |
Step 5 | In the displayed dialog, click Remove Location. |
Step 6 | Click Yes in the warning message informing you that the devices will be moved to the Unmapped Devices list. |
Note | If devices are very close to each other (approximately 8 meters apart or less), zooming in will not show the individual devices. Follow the procedure below to see the individual devices in the cluster. |
To see a list of the devices in a cluster:
Step 1 | Click on the cluster icon. |
Step 2 | In the displayed popup, click Show Devices. The devices in the cluster are listed in the panel to the right of the map. |
Step 3 | You can change the location of a device by dragging it from the list onto the map or by clicking Set Manually and specifying new coordinates. |
In the geo map, you can search for devices by device name, IP address or device family. The search results show the device icon, the device name, and the highest severity alarm on the device. To search for specific devices in the geo map:
Step 1 | Click the Search icon in the toolbar. |
Step 2 | Type the full or partial device name/IP address/device family in the search text box and press Enter. The Search Results panel lists the devices that match your search and indicates whether they are mapped or unmapped. Click on the i icon to show the Device 360 which contains more information about the device. |
Step 3 | Select a device in the search results to highlight it in the map. |
You can search for a specific location in the geo map, for example, a state, country, town, or a specific address. If you enter a keyword in the search box, the results will show all locations that contain that keyword, down to the level of a specific street. You can then select the required location in the search results to pinpoint it in the map.
Note | Internet connectivity is required to perform this location search. |
To search for a specific location in the geo map:
Step 1 | Click the Search icon in the toolbar. |
Step 2 | Type the full or partial result in the search text box and press Enter. The Address tab in the search results panel lists locations that match your search. |
Step 3 | Select a location in the search results. The map pans and zooms to the specified location and a marker on the map indicates the exact location. |
In the geo map, you can see a three-dimensional view of the links in your network, separated by link type.
Click the Link Layers icon on the right to access the 3D link layers view. Click the icon again to return to the full geo map.
Note | Several operations such as pan, zoom, filter, and search are not available in the 3D link layers view. |
The circuit/VC overlay functionality in the geo map is very similar to overlay in the topology map. However, because of some differences in the functioning of the maps, a few items regarding overlay functionality in the geo map need to be noted
To overlay a circuit on the geo map, select the circuit/VC in the Circuits/VCs tab on the left, as you would in the topology map.
Select the Show Participating Devices Only check box to remove all devices from the map except for those participating in the selected circuit/VC.
Click the Participating Deviceslink to show a list of all the devices participating in the circuit/VC. The list shows the role of the devices, for example, A-side and Z-side, and you can change the location of the devices or remove them from the map.
If a participating device is in a cluster on the geo map, the badge denoting the role of the device is shown on the cluster icon. Zoom in to see the individual devices so that you can see exactly which device the role badge is marking. Alternatively, click on the Participating Devices link to see all the devices and their roles in the circuit/VC.
If some of the participating devices are not currently displayed on the map, a message will be displayed and will enable you to open the list of unmapped devices. You can place them on the map by dragging and dropping the devices or click Set Locationand enter their GPS coordinates.
Note | This feature is supported on optical devices and links only, specifically NCS 2000 and NCS 4000 devices and OTS or OTU links. |
A Shared Risk Resource Group (SRRG) is a set of devices and links that share a common resource, which if it fails, would affect all the devices and links in the group and the circuits in which they participate. The devices and links in the group share the same risk of failure and are therefore considered to belong to the same SRRG. For example, links sharing a common fiber are said to be in the same SRRG because a fault with the fiber might cause all links in the group to fail.
For devices, the SRRG is configured on the global device level. For links, the same SRRG is configured on the A-side and Z-side interfaces.
In the geo map, you can visualize SRRGs that have been configured on specific devices and discovered by the system. These SRRGs have an auto-generated numeric ID that cannot be changed but you can assign a label to the SRRG to provide a more easily identifiable name. You can also assign SRRGs to specific devices/links, modify SRRG assignments, and create and assign new SRRGs.
SRRG management is accessed from the geo map, from the Shared Risks (SRRGs) button above the map. When managing SRRGs, the map is filtered to show only devices that support SRRG.
See View Assigned and Unassigned SRRGs and Manage SRRG Assignments for more information.
You can view a global list of the SRRGs configured on the managed devices. Since these SRRGs were discovered by the system or user-defined on specific devices or links, they are all "assigned" SRRGs. You can also see unassigned SRRGs. SRRGs can only be deleted from the system if they are unassigned.
Each SRRG has a numeric ID that cannot be changed but you can assign a label to the SRRG to provide a more easily identifiable name.
You can select an SRRG to show the devices/links to which it is assigned in the geo map.
To view and label SRRGs:
Step 1 | In the left sidebar, select Maps > Topology Maps > Network Topology. |
Step 2 | Click on the Geographical Map toggle button in the top right corner of the map. |
Step 3 | Click the Shared Risks (SRRGs) button above the map and select View and Name. The Shared Risk Resource Groups dialog is displayed. It contains two tabs showing assigned and unassigned SRRGs. Note that when viewing SRRG assignments, your device group selection is changed to the default All Locations group. |
Step 4 | Select a SRRG to view it in the geo map. The devices and links on which the SRRG is defined will be highlighted in the map. |
Step 5 | To rename a SRRG, click in the SRRG Label column alongside the relevant SRRG ID, type in the required unique name, and click Save. |
A simple wizard enables you to select specific devices and links, see which SRRGs are assigned to them and change the assignments as required.
To manage SRRG assignments:
Command or Action | Purpose | |
---|---|---|
Step 1 | In the left sidebar, select Maps > Topology Maps > Network Topology. | |
Step 2 | Click on the Geographical Map toggle button in the top right corner of the map. | |
Step 3 | Click the Shared Risks (SRRGs) button above the map and select Manage Assignments. The Manage SRRG Assignments wizard opens. | |
Step 4 | Select the devices/links for which you want to manage SRRG assignments. You can either click on the required devices/links in the map or click in the box in Step 1 of the wizard and select devices from the list. | |
Step 5 | Click Next. You will see a list of all the SRRGs common to all the devices/links you selected in the previous step. If an SRRG is assigned to one of the selected devices but not to the others, it will not be shown in the list. The SRRGs are color-coded based on whether they are the default on the device, assigned, or yet to be assigned. Click on the question mark icon to see the legend. | |
Step 6 | Click the Plus icon and select additional SRRGs for the selected devices/links or create a new SRRG on the fly by typing an SRRG name. If the name is unique, a Create New link will appear. | |
Step 7 | Click Next to see a summary of your selections and SRRG assignments. | |
Step 8 | Click Finish. You will be notified if the SRRG modification was successful. If it failed, an error dialog will provide details of the failure. |