Table 2: Scenario 2: Troubleshooting Unicast Forwarding Between VTEPs in the Same VLAN Through a Layer 2 VNI To troubleshoot unicast forwarding between two VTEPs in the same VLAN using a Layer 2 VNI, follow these steps: • Verify the provisioning of the EVPN VXLAN Layer 2 overlay network. • Verify intra-subnet traffic movement in the EVPN VXLAN Layer 2 overlay network. Verifying the Provisioning of an EVPN VXLAN Layer 2 Overlay Network To verify the provisioning of an EVPN VXLAN Layer 2 overlay network, perform these checks: 1. Verify the Provisioning of the EVPN Instance in EVPN Manager, on page 7 2. Ensure that an NVE Peer is Present for the Layer 2 VNI, on page 9 3.
Verify the Provisioning of the Layer 2 VNI in NVE Component, on page 9 4. Verify That the Layer 2 VNI VXLAN Tunnel Pseudoport is added to the Access VLAN in Layer 2 Forwarding Information Base (FIB), on page 10 Verify the Provisioning of the EVPN Instance in EVPN Manager The following examples show how to verify that the EVPN instance is provisioned in the EVPN manager: VTEP-1# show run | section l2vpn l2vpn evpn instance 10 vlan-based encapsulation vxlan Troubleshooting BGP EVPN VXLAN Verifying the Provisioning of an EVPN VXLAN Layer 2 Overlay Network Check to be Performed Steps to Follow Has ARP been resolved on the local host for the Layer 2 adjacent remote host?
Run the arp -a command in privileged EXEC mode on the host device. Do the hosts have the same subnet masks? Perform any of the following steps: • Check the host device. • Check the SVI configuration on the VTEP. Do you have the EVPN instance configured on your local VTEP? Run the following commands in privileged EXEC mode on the VTEP: • show run | section l2vpn • show run | section vlan config • show run interface nve interface-number Has the remote MAC address been learned in platform MATM in the same VLAN as the local host?
Run the show platform software fed switch active matm macTable vlan vlan-id command in privileged EXEC mode on the VTEP to check for the remote MAC addresses in the same VLAN. Troubleshooting BGP EVPN VXLAN 7