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Cisco Catalyst SD-WAN CLI lab 9 of 14

Direct internet access

Let a branch reach the internet directly through its own circuit: NAT on the transport interface and a service-VPN route that points at VPN 0.

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 09 - Direct internet access

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Level
Advanced
Time
About 50 minutes
Nodes need
6 vCPU, 5,632 MB
Smallest plan
Lite

The scenario

Manchester's staff reach the internet through head office, which wastes the site's own internet circuit. You give the branch direct internet access (DIA): traffic for the internet leaves through BR1's own circuit, translated to BR1's public address, while traffic for other sites stays on the overlay.

NodeSystem IPSiteINET (ge0/0)LAN, VPN 10 (ge0/1)
BR110.255.0.1111198.51.100.1110.11.10.1/24, H1 10.11.10.10
BR210.255.0.1212198.51.100.1210.12.10.1/24
WEB198.51.100.254, the provider's gatewayalso hosts a public site on 203.0.113.80

vBond is 198.51.100.1 and vSmart is 198.51.100.2. Both edges have ip route 0.0.0.0/0 198.51.100.254 in VPN 0.

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. This lab is direct internet access with NAT only. The enterprise firewall and SIG need IOS XE edges and aren't in this course. 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

  • Enable NAT on a transport interface
  • Add a route from a service VPN to VPN 0
  • Read the NAT translations and prove the traffic left locally

The tasks

  1. Start the lab
  2. See the problem
  3. Enable NAT on the transport
  4. Point VPN 10 at VPN 0
  5. Prove the traffic left locally

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 Direct internet access6 nodes and 1 network, 6 links. Every link is listed as text below the diagram.vBondvSmartBR1BR2H1WEBINETG0/1eth0ge0/0eth0G0/0G0/0eth0
6 nodes and 1 network, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
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)
  • WEB eth0 to INET (network)
  • BR1 G0/1 to H1 eth0
Nodes in Direct internet access, 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
WEBEVE-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 09 - Direct internet access 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.