- Overview
- User Interface
- Plan Objects
- Traffic Demand Modeling
- Simulation
- Simulation Analysis
- Traffic Forecasting
- IGP Simulation
- MPLS Simulation
- RSVP-TE Simulation
- Segment Routing Simulation
- Layer 1 Simulation
- Quality of Service Simulation
- BGP Simulation
- Advanced Routing with External Endpoints
- VPN Simulation
- Multicast Simulation
- Metric Optimization
- LSP Optimization
- RSVP-TE Optimization
- Explicit and Tactical RSVP-TE LSP Optimization
- Segment Routing Optimization
- Capacity Planning Optimization
- L1 Circuit Path Optimization
- Changeover
- Patch Files
- Reports
- Cost Modeling
- Plot Legend for Design Layouts
Changeover
WAE Design lets you model the topology, routings, and utilizations of a currently operational network. It also allows exploration of modifications to that network. For example, interface metrics can be modified or explicit LSP routings changed to obtain a new routing configuration.
The Changeover tool provides a step-by-step sequence of routing configuration changes to move a network safely from an initial configuration to a prespecified final configuration. WAE Design selects the order of these changes so that there is as little as possible congestion in the network during intermediate configurations, and so that this congestion lasts for as few intermediate steps as possible.
Only certain configuration changes are allowed between the initial and final plan:
- Changes to interface metrics
- Changes to LSP configurations
- Changes of circuits and node from the active to the inactive state, and vice versa
An individual step in the changeover sequence consists of one of the following:
Running the Changeover Tool
Step 1
Open both the initial and final network plans in WAE Design, and choose the desired plan to view.
Step 2 Choose Tools > Changeover.
Step 3 Decide on the changeover options to use. (See Table 25-1 for field descriptions.)
Reports
Changeover creates a report that contains Summary, Steps, and Utilizations sections.
- To access this information later, choose Window > Reports.
- To export the steps taken to change over to a new plan file, right-click Steps in the Reports window, and choose Export Tables.
- To export the utilization values to a table, right-click Utilizations in the Reports window, and choose Export Tables.
Summary
The Summary section contains a list of the options used to run the changeover. It also contains a summary of the differences between the initial and final plans, the number of steps taken, and the number of steps resulting in intermediate configurations with utilizations in excess of the acceptable utilization.
Steps
The Steps section contains the following columns, some of which you might need to show because they are hidden:
– MetricChange—An interface metric is changed.
– CapacityChange—An interface capacity is changed.
– TunnelsFromRouter—LSPs from a specified router are to be reconfigured.
– ActivateNode—A node (router) is activated.
– DeactivateNode—A node (router) is deactivated.
– ActivateInterface—An interface is activated.
– DeactivateInterface—An interface is deactivated.
– If Action is MetricChange, the node containing the interface of the metric to change.
– If TunnelsFromRouter, the node at which the LSPs are to be reconfigured.
– If ActivateNode or DeactivateNode, the relevant node.
– If ActivateInterface or DeactivateInterface, the node containing the relevant interface.
- RemoteNode—If Action is MetricChange, the remote node containing the interface of the metric to change.
- Circuit—If Action is MetricChange, the circuit for the metric change.
- Interface
– If Action is MetricChange, the interface name.
– If TunnelsFromRouter, ActivateNode, or DeactivateNode, this is na (not applicable).
– If ActivateInterface or DeactivateInterface, the relevant interface name.
- MaxUtil—The maximum interface utilization at this step.
- UtilLocation—The interface on which the maximum utilization occurs.
- ChangeTo—If Action is MetricChange, the original metric. Otherwise, this is set to “na.”
- ChangeFrom—If Action is MetricChange, the metric to be configured at this step. Otherwise, this is set to “na.”
Utilizations
The Utilizations section contains all utilizations for all interfaces in the network, for each step in the changeover sequence.
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