routing analysis troubleshooting work book

8/12/2019 Routing Analysis Troubleshooting Work Book

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Routing Analysis & Troubleshooting

Workbook

1. Search, map and visualize a routing designObjective

Create a map for all devices or interfaces running a certain routing protocol.

Visualize the routing design in the map

Instructions

a. Search and map a routing design1) Enter a configuration keyword such as router eigrp in the Searchbox and press the Enterkey.

Use double quotes around the string to match the whole string.


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2) Check the checkbox before the category Configuration file to select all devices under this

category. Check the checkbox Create new mapand then click the Map Selected Deviceslink. A

new Qmap (Qmap1) is created.

3) Zoom in on the map to see the routing protocol along the link.

b. Highlight the routing protocolSelect Highlight>> Routing Protocol from the map floating menu of the map you created in the


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previous step. In the pop up window, keep the default setting (highlight all routing protocols) and

click OK.

c. Annotate the configurations of a routing protocol on the mapMouse over an object on the map such as a routing protocol to view its configurations and click the

Display on the current mapbutton to save it as a note on the map.

d. Launch Design Reader to analyze the routing design


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1) From the tip window, click the To Design Readericon. The Design Reader pane opens at the

bottom.

2) Select two devices (NY-WAN-Trand SF-WAN1-Tr) on the map and their configurations will be

displayed in the Design Readerpane. Select a design filter (Routing Redistribution) in the lower

left pane. In our example here, it shows the routing redistribution from EIGRP to BGP.

e. Create a dynamic link group for all interfaces running a certain routing protocolThe map you created earlier shows the devices running EIGRP 1300. For routing protocol such as

EIGRP or OSPF, it is ideal to create a map to draw only the interfaces running this routing protocol.

You can create a link group to serve this purpose.


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1) In the Workspacepane, right click on the Local node under Link Group and select the New Link

Group option.

2) Enter a unique name (eigrp interfaces). Under Search Dynamic Interfaces, select Routing

Protocol from the drop-down menu of criteria Aand enter eigrp#eigrp_as (#eigrp_as is a

variable). Click the OKbutton. Click the Yesbutton if a popup window comes up.

Note: Under Search Dynamic Devices, you can enter the criteria to search devices and all

interfaces of the matched devices are added into the link group.

3) Right click on the link group you just created in the Workspacepane and select the Create Map

option. Enter an EIGRP AS number (1300) under the Valuefiled in the popup window and click

the OK button.


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Note: the link group name, the variable name and value are labeled in the created map.

2. Use Procedure to document the routing protocol designObjective

Run automation procedures to

Filter a routing protocol configuration

Draw a map with all devices running this routing protocol

Draw note to show the configurations


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Instructions

Automation procedures provide further automation to document the routing design. If you are

interested in how to write this type of procedure, attend our free web training class Network

AutomationviaQapp Intermediate. Here we use a built-in procedure as an example.

a. Search procedures in the Procedure Center

Click the Proceduretab and then the Qapp Centericon in the ribbon menu. At the top of the Qapp

Center is the Searchbox. Enter a keyword (for example, eigrp) and the first file matching this

keyword will be highlighted. Double click a procedure (Highlight EIGRP Configuration) to pre-view

the procedure. Click the Editlink to edit the procedure.


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b. Run a procedureRight click a procedure (Highlight EIGRP Configuration) and select the Run...option.

c. Select seed devicesIn the Procedure Taskwindow, click the Select Seed Deviceslink. In the Select Device(s)window,

click on the Device Groupradio button and select a device group (Netbrain Class Lab)from the pull

down menu. Click the >>button to select all devices in this device group. Click the OKbutton.


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Wait for the process to finish. This procedure will create a map with EIGRP devices and their EIGRP

configurations as device notes. Right click the blank space of the map and select the Auto Link

option to link the devices. You may also right click the blank space of the map and select the Auto

Layoutto get a better layout.

Note: some procedures such as the one we just ran, Highlight EIGRP Configuration, are run againstthe current baseline. If a procedure requires retrieving data from the live network, it may take some

extra time to finish.


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3. Route Table toolkitObjective

View the route table and find the route to a destination quickly

Identify any flapping routes and how a route is propagated

Compare the route tables to find any missing routes

Instructions

a. View the route tableSelect a router (NY-WAN-Tr) in a map and click Route Table>> Route Table from the map floating

menu.

b. Sort the route entries


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Click on a parameter to sort route entries by this parameter. For example: sort the routes by Age

in ascending order to find flapping routes.

c. Find the route for a destinationEnter a destination IP address or subnet (10.81.12.0) in the Filterfield of the Route Table pane,

then press the Enterkey.

d. Map the route on the mapCreate a new map and drag-and-drop a route entry to the Qmap.

e. Find out how a route is propagated


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Click the Go To Next-hop button to discover how this subnet is routed to the next hop device.

Continue this process till the destination is reached.

4. Ping and Traceroute toolsObjective

Ping a device

Traceroute to a device and map the results


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Instructions

a. Run proxy ping from a device1) In the ribbon menu under the Hometag, select the Qapp group Network Analysis Tools. All

common used network analysis tools are under this Qapp group. Click Ping tooption under the

functional category Live Tools.

2) In the Pingwindow, under Ping Fromselect Deviceand press the button to select the ping

source (Bos-Core1-Tr). Similarly select the device (BOS-MUL-SRV-TR) or IP (10.83.10.20) to

ping to. Click the Startbutton to run proxy ping.


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b. Run traceroute from a device to an IP address1) In the ribbon menu under the Hometag, select the Qapp group Network Analysis Tools. Click

Traceroute tooption under the functional category Live Tools.

1) In the Traceroutewindow, switch to the Live Traceroute tab. Under Traceroute fromselect

Device and press the button to select the traceroute source (Bos-Core2-Tr). Similarly

select the device (SF-Office-SW-Tr) or IP to traceroute to. Click the Traceroutebutton to run

the traceroute. The system will login to the source device and issue the traceroute command.


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c. Map the traceroute resultsIn the Traceroutewindow, click the Optionsbutton to set the correct option and then click the

Mapbutton. A new map will be created to draw the path for the traceroute results.

5. Automation on CLI commands

Objective

Execute CLI commands to retrieve the routing status, for example, BGP/OSPF/EIGRP neighbors

Compare CLI commands (text-based difference)

Find out the real data change of a CLI command via NCT procedure


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Monitor the real data change of CLI commands via Qapp

Instructions

a. Execute CLI commandsOn the map you created in step 1, click Run >> Execute CLI Commands from the map floating menu.


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b. Add commands to be executedClick the Add via Template button and check the checkbox next to the template EIGRP Command Template

to add all EGIRP commands of this template. Click the OKbutton.

c. Execute commandsClick the Start button. You can select one device to see the execution status and log.


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d. View show command resultsAfter the system finishes execution, click View Outputs to view results. Select one device (SF-

NetMan-Tr) and one command (show ip eigrp neighbors).

Tip: the show command results can also be viewed in the Map Datapane.

e. Compare show command resultsClick the Comparebutton in CLI Command Outputs Browserwindow. Select two DataFolders and

then click the Comparebutton. Note that the differences are highlighted and it is pure text-basedcomparison.


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f. View the real data change of a CLI commandRight click on a device (SF-NetMan-Tr) in the map and select Device Data >> EIGRP Neighbors. Click

the Retrieve Live button in the EIGRP Neighbors pane to retrieve the data on demand.


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Click Compare button in the EIGRP Neighbors pane and select two DataFolders to compare the

data. Note that the system does not think that an EIGRP neighbor has changed even if the field

Uptime is different.

Note:

The device data EIGRP Neighborswe just demonstrated is implemented by NCT procedure. In the ribbon menu

under the Proceduretag, click the System Procedure Manager icon to view NCT procedures.


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A NCT procedure(NCT means Network Control Table) is used to benchmark and analyze the key network data.

The data created by NCT Procedure are identical to the system built-in data such as route table.

g. Monitor the data change of a CLI command via QappAs you may learn from other NetBrain classes, NetBrain Qapp is a standalone application which can be executed

from inside NetBrain Workstation. From the point of an end user, a Qapp is usually run within a Qmap to

monitor the data retrieved from any CLI command. The output of a Qapp map with the hotspot highlighted,alarms and the data chart.

NetBrain team has created Qapps and Procedures for the routing protocols. From the ribbon menu under the

Hometag, select the Qapp group Analyze EIGPR Neighbors and Routes. There are four function categories for

this group, Map, Configuration, Monitorand Compare. Each function category includes one or multiple Qapps

or Procedures.


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Click the Monitor EIGRP option under Monitorfunctional category. The Instant Monitor window opens. The

variables to be monitored are listed as well as the input for the Qapp. Click the Runbutton.

The variables are displayed in the Qmap and refreshed very 2 minutes. The current variable value and its

historical chart are shown under the map.


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routing analysis troubleshooting work book

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