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Cisco NX-OS data centre lab 8 of 15

VXLAN EVPN on two leaves

Stretch a VLAN between two Nexus leaves over a plain routed network. OSPF gives you the underlay, iBGP EVPN the control plane, and VXLAN carries the frames. Then add an anycast gateway and an L3 VNI, so a tenant routes between subnets inside the fabric.

Run this lab

It needs Standard: its 6 nodes are set to 8 vCPU and 14,336 MB in total.

In your workspace: Shared, then Cisco Nexus NX-OS data centre guided labs, then 08 - VXLAN EVPN on two leaves

Run it on Standard from £5 a day

The free demo can’t run it: it has 6 vCPU and 8 GB, and this lab’s nodes need 8 vCPU and 14,336 MB together. Every lab plan includes every guided lab.

Level
Advanced
Time
About 90 minutes
Nodes need
8 vCPU, 14,336 MB
Smallest plan
Standard

The scenario

Tenant Calder Freight has servers in two rows of hall 3, and they must share a subnet. The rows are joined by routed links through R1, which knows nothing about VXLAN and shouldn't have to. You'll build the overlay on N1 and N2. OSPF is already up between the two leaves and R1, and all interfaces in the path use an MTU of 9000, so VXLAN's extra 50 bytes fit.

ItemN1N2
Loopback0, the VTEP address10.255.0.110.255.0.2
Host portsH1 on Ethernet1/6, VLAN 10H2 on Ethernet1/6, VLAN 10. H3 on Ethernet1/7, VLAN 20
SegmentVNISubnet and gatewayWhere
VLAN 10 SERVERS1001010.10.10.0/24, .1Both leaves
VLAN 20 BACKUPnone10.20.20.0/24, .1N2 only
VLAN 50050001, VRF RED's L3 VNInoneBoth leaves

iBGP AS 65000 between the loopbacks. Anycast gateway MAC 001c.7300.0001. Hosts: H1 10.10.10.11, H2 10.10.10.12, H3 10.20.20.13.

What you’ll practise

  • Explain underlay, overlay, VTEP and VNI
  • Build iBGP EVPN between leaf loopbacks
  • Map a VLAN to a VNI and bring up nve1 with BGP ingress replication
  • Read route types 2 and 3 and follow a MAC address through the control plane
  • Add an anycast gateway and an L3 VNI for symmetric routing

The tasks

  1. Start the lab
  2. The overlay's control plane
  3. Stretch VLAN 10
  4. Read the control plane
  5. Anycast gateway and an L3 VNI

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 VXLAN EVPN on two leaves6 nodes, 5 links. Every link is listed as text below the diagram.N1N2R1H1H2H3e6eth0e6eth0e7eth0e1Gi0/0e1Gi0/1
6 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • N1 e1 to R1 Gi0/0
  • N2 e1 to R1 Gi0/1
  • N1 e6 to H1 eth0
  • N2 e6 to H2 eth0
  • N2 e7 to H3 eth0
Nodes in VXLAN EVPN on two leaves, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
N1Cisco Nexus 9000vnxosv9k-9300v-9.3.102 vCPU, 6,144 MB
N2Cisco Nexus 9000vnxosv9k-9300v-9.3.102 vCPU, 6,144 MB
R1Cisco IOSvvios-adventerprisek9-m.SPA.159-3.M61 vCPU, 512 MB
H1Alpine Linuxclbalpinebase-alpine-base-3-20-31 vCPU, 512 MB
H2Alpine Linuxclbalpinebase-alpine-base-3-20-31 vCPU, 512 MB
H3Alpine Linuxclbalpinebase-alpine-base-3-20-31 vCPU, 512 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 Nexus NX-OS data centre guided labs.

  3. Open 08 - VXLAN EVPN on two leaves 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.

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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.