Symptom
ERSPAN destination configuration for the Nexus 7000 is confusing and may result in ERSPAN sessions looking correctly configured, encapsulated, and sent, but no ERSPAN traffic egressing to the ERSPAN destination.
Conditions
Configuring ERSPAN on the Nexus 7000
Workaround
Use the destination IP of the ERSPAN session for the "source ip" field in the ERSPAN destination
Further Problem Description
ERSPAN destination configuration for the Nexus 7000 is confusing. The "source IP" configuration of the ERSPAN destination should be the IP address on this device that is defined as the destination IP of the ERSPAN that has been configured on the ERSPAN source. This is the local interface where the 7K should expect ERSPAN packets to be destined to for decapsulation.
