Packet Capture On Nexus 9k !full! Jun 2026

The Nexus 9000 uses a Linux kernel internally. Ethanalyzer is essentially a command-line wrapper for TShark (Terminal Wireshark).

ELAM captures a at wire speed on a specific ASIC pipeline. Useful for debugging forwarding issues. packet capture on nexus 9k

If you need to capture transit traffic and analyze it in a GUI tool (Wireshark), SPAN is the traditional method. The Nexus 9000 uses a Linux kernel internally

! Define the source (monitored port) N9K(config)# monitor session 1 N9K(config-monitor)# source interface ethernet 1/1 both ! Define the destination (sniffer port) N9K(config-monitor)# destination interface ethernet 1/2 N9K(config-monitor)# no shut packet capture on nexus 9k

N9K# ethanalyzer local interface inband

To capture a specific number of packets and stop automatically: