View source for ARISTA - VXLAN Troubleshooting

== Checking VXLAN Tunnel Status ==
To verify the status of VXLAN tunnels, use the following command:

 <nowiki>
show vxlan tunnel</nowiki>

This command shows information about the VXLAN tunnels including tunnel IDs, state, and the associated interfaces.

== Checking VXLAN Interfaces ==
To view the VXLAN interface configuration:

 <nowiki>
show running-configuration interface Vxlan1</nowiki>

This command will display the configuration of a specific VXLAN interface, such as Vxlan1. You can check the VXLAN source interface, remote VTEP IP addresses, and other details.

== VXLAN Forwarding Table ==
To check the VXLAN forwarding table, which maps VXLAN Network Identifiers (VNIs) to Layer 2 and Layer 3 addresses:

 <nowiki>
show vxlan forwarding</nowiki>

This will show all mappings of VNIs, the associated MAC addresses, and IP addresses.

== Checking VTEP (VXLAN Tunnel Endpoints) Neighbors ==
To see the VTEP neighbor information, including the status and remote IPs of other VXLAN devices:

 <nowiki>
show vxlan neighbors</nowiki>

This command gives you the list of remote VTEP peers, their tunnel states, and additional statistics.

== Checking MAC Address Table for VXLAN ==
To view the MAC address table for VXLAN:

 <nowiki>
show mac address-table vxlan</nowiki>

This command will display MAC address learning entries for VXLAN, allowing you to check if MAC addresses are being correctly learned or flooded.

== Checking Routing Table for VXLAN ==
To check the IP routing table for VXLAN:

 <nowiki>
show ip route vxlan</nowiki>

This will show you the IP routes for VXLAN and their associated next hops.

== Verifying VXLAN Configuration Consistency ==
To verify that your VXLAN configuration is consistent across the device:

 <nowiki>
show running-configuration | section vxlan</nowiki>

This command filters the running configuration to display only the VXLAN-related settings, making it easier to spot inconsistencies.

== Checking Layer 2 Overlay Status ==
To check the status of the Layer 2 overlay and ensure that VXLAN segments are functioning:

 <nowiki>
show ethernet-switching table vxlan</nowiki>

This will show the Ethernet switching table for VXLAN and indicate whether there are any issues with the Layer 2 forwarding over the VXLAN network.

== VXLAN BGP EVPN Status ==
To check the status of VXLAN BGP EVPN (Border Gateway Protocol Ethernet Virtual Private Network), including routes and neighbors:

 <nowiki>
show bgp l2vpn evpn</nowiki>

This will show BGP EVPN status, including the advertised routes and BGP neighbor information specific to VXLAN.

== Checking VXLAN MTU (Maximum Transmission Unit) ==
To check the VXLAN MTU settings and ensure they are configured correctly for the encapsulation overhead:

 <nowiki>
show system mtu</nowiki>

This command helps to verify that the MTU is sufficient for VXLAN encapsulation and avoid issues like packet fragmentation.

== Verifying the VXLAN Data Plane ==
To verify the VXLAN data plane and check for any dropped packets or other issues:

 <nowiki>
show interface Vxlan1 counters</nowiki>

This will show detailed statistics on the VXLAN interface, including the number of packets sent/received and any errors or drops.

== Troubleshooting VXLAN Bridging ==
If you're facing issues with VXLAN bridging, you can check the bridging status:

 <nowiki>
show bridging vxlan</nowiki>

This will display the status of VXLAN bridging, which helps in troubleshooting Layer 2 bridging problems within a VXLAN overlay.

== Debugging VXLAN Issues ==
For deeper troubleshooting, use the following command to enable debugging for VXLAN:

 <nowiki>
debug vxlan</nowiki>

This command provides detailed debug information for VXLAN-related events, such as tunnel establishment and traffic forwarding.

== Checking VTEP-to-VTEP Connectivity ==
To check VTEP-to-VTEP connectivity at the network layer, use the following command:

 <nowiki>
ping vxlan <remote VTEP IP></nowiki>

This command will send a ping request to the remote VTEP to ensure that the network path is active and reachable.

== Verifying ARP Table for VXLAN ==
To verify ARP entries for VXLAN:

 <nowiki>
show arp</nowiki>

This shows the ARP table entries for VXLAN and can help identify ARP issues or mismatches that could cause VXLAN traffic to fail.

== Verifying VXLAN with BGP Multicast ==
If using VXLAN with multicast for BGP, you can check multicast group membership:

 <nowiki>
show ip mroute</nowiki>

This will show multicast routing information and verify if multicast is functioning correctly for VXLAN.

== Checking VRF for VXLAN ==
If VXLAN is configured within a VRF, use the following command to show VRF-specific VXLAN information:

 <nowiki>
show vrf VXLAN</nowiki>

This command displays VRF-specific VXLAN details, including interfaces, IP addresses, and routing information.

== Monitoring VXLAN Traffic Flow ==
For monitoring traffic flows across VXLAN, the `flow-collector` command is useful:

 <nowiki>
show flow-collector vxlan</nowiki>

This command will display VXLAN-related traffic flow information, which is helpful in diagnosing performance or congestion issues in the VXLAN network.