Troubleshooting Endpoint Connectivity
Inspect the operational status of each endpoint.
The operational status will reveal any fault or misconfiguration of the endpoints. SeeInspecting the Endpoint Status .
Inspect the status of the tunnel interface.
The operational status will reveal any fault or misconfiguration of the tunnel. See Inspecting the Tunnel Interface Status.
Perform a traceroute between the endpoint groups (EPGs).
A traceroute will reveal any problems with intermediate nodes, such as spine nodes, between the endpoints. See Performing a Traceroute Between Endpoints.
Configure an atomic counter on an endpoint.
The atomic counter will confirm whether the source endpoint is transmitting packets or the destination endpoint is receiving packets, and whether the number of packets received equals the number of packets sent. See Configuring Atomic Counters.
Inspect the contracts under each EPG.
Inspect the contracts under each EPG to make sure they allow the traffic that should flow between the EPGs. As a test, you can temporarily open the contracts to allow unrestricted traffic.
Configure a SPAN policy to forward source packets to a monitoring node.
A packet analyzer on the monitoring node will reveal any packet issues such as an incorrect address or protocol. See Configuring a Tenant SPAN Session Using the Cisco APIC GUI.