Nexus 9k Packet Capture

Troubleshooting routing protocols (OSPF, BGP), Spanning Tree (STP), or management traffic (SSH, SNMP). Key Command:

The Nexus 9k is a beast of hardware acceleration. Respect the Data Plane, use the Control Plane tools gently, and let the ASIC's mirror (SPAN) do the heavy lifting. nexus 9k packet capture

The Nexus 9000 series does not support the classic Cisco monitor capture (Embedded Packet Capture / EPC) found on IOS or IOS-XE devices. Instead, it relies on two distinct mechanisms: (for traffic mirroring to an external analyzer) and the Switch Analysis Module (SAM) (for on-board, filterable, limited buffer capture). For modern NX-OS versions (10.2+), SAM is the closest native equivalent to "packet capture." The Nexus 9000 series does not support the

: SPAN sessions on the Nexus 9000 often cannot capture broadcast/multicast packets (like ARP or OSPF Hellos) if the source is the supervisor in-band interface; use physical interfaces as sources instead. 3. Integrated Tool: SPAN-to-CPU 3. Integrated Tool: SPAN-to-CPU