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Cisco Catalyst SD-WAN CLI lab 11 of 14

Troubleshoot control connections

The new branches never joined the overlay. Find four faults with the control-connection history and its error codes, and fix each one.

Run this lab

It needs Lite: its 6 nodes are set to 6 vCPU and 5,632 MB in total. That fits the free demo too.

In your workspace: Shared, then Cisco Catalyst SD-WAN CLI guided labs, then 11 - Troubleshoot control connections

Try it free for 30 minutesRun it on Lite from £3 a day

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Level
Advanced
Time
About 75 minutes
Nodes need
6 vCPU, 5,632 MB
Smallest plan
Lite

The scenario

A contractor configured the Manchester and Leeds routers last night and left. Neither branch has joined the overlay, and the ticket says only "it doesn't work". There are four separate faults on the devices. Your tool is the history of failed connections: each failure leaves an error code, and each code points at one thing.

NodeSystem IPSiteINETOther
vBond10.255.0.11000198.51.100.1
vSmart10.255.0.21000198.51.100.2
BR110.255.0.1111198.51.100.11LAN ge0/1 10.11.10.1/24, H1 10.11.10.10; VPN 512 eth0 10.254.0.11/24
BR210.255.0.1212198.51.100.12loopback1 10.12.10.1/24 in VPN 10
CA10.254.0.50/24 on the management network

The organisation name is MeridianFoods. CA works as in labs 01 and 02: user ca, password Cl@ssLab1, and it signs anything dropped into /home/ca/incoming, numbering from 5001.

What this course leaves out. There is no SD-WAN Manager (vManage) in any of these labs. A virtual edge can't join the Manager's inventory without a signed device list from Cisco, which these labs don't have. So you won't see the Manager's GUI, dashboards, templates, Policy Builder or zero-touch onboarding. You work at the CLI of the controllers and edges, with a private lab CA and device lists typed by hand. You diagnose from the CLI only. The Manager's alarms, events and device views aren't here. The hosts have fixed addresses set at boot, because the DHCP server on these vEdge images can lock up the edge at start-up.

What you’ll practise

  • Read show control connections-history and its error codes
  • Compare local properties with the authorised lists
  • Fix identity, reachability and list faults

The tasks

  1. Start the lab
  2. Learn the method
  3. Leeds can't find anyone
  4. The vBond turns Leeds away
  5. Manchester's organisation
  6. Update the lists
  7. Prove the overlay

The Lab Tasks pane has the scenario, these tasks, the checks to run, hints and the full solution.

Topology and devices

The network as it opens in EVE-NG, drawn from the lab’s own canvas, and the image each node runs.

Topology of Troubleshoot control connections6 nodes and 2 networks, 7 links. Every link is listed as text below the diagram.vBondvSmartBR1BR2H1CAINETMGMTeth0eth0ge0/0eth0G0/1eth0G0/0G0/0
6 nodes and 2 networks, with the interface names each link uses.
Every link, as text
  • vBond ge0/0 to INET (network)
  • vSmart eth0 to INET (network)
  • BR1 G0/0 to INET (network)
  • BR2 G0/0 to INET (network)
  • BR1 G0/1 to H1 eth0
  • BR1 eth0 to MGMT (network)
  • CA eth0 to MGMT (network)
Nodes in Troubleshoot control connections, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
vBondCisco vBondvtbond-20.12.21 vCPU, 1,024 MB
vSmartCisco vSmartvtsmart-20.12.21 vCPU, 1,024 MB
BR1Cisco vEdgevtedge-20.12.21 vCPU, 1,024 MB
BR2Cisco vEdgevtedge-20.12.21 vCPU, 1,024 MB
H1Alpine Linuxclbalpinebase-alpine-base-3-20-31 vCPU, 512 MB
CAEVE-NG GUI server (Docker)eve-gui-server:latest1 vCPU, 1,024 MB

How to open this lab

  1. Sign in to your workspace at lab.cloudlabbox.com.

  2. In File Manager, open Shared, then the folder Cisco Catalyst SD-WAN CLI guided labs.

  3. Open 11 - Troubleshoot control connections and start its nodes, then open Lab Tasks for the scenario and the steps.

The lab is read-only. You can start the nodes and configure the devices, but changes to the topology can’t be saved. To change it, rebuild it in your own folder.

More Cisco Catalyst SD-WAN CLI labs

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CloudLabBox is independent of Cisco. The lab follows exam topics and isn’t vendor training material; vendor names identify the exams and the images in the workspace.