Creating a SPAN session on a Nexus 9K

Create SPAN session
=================================
9kswitch# conf t
9kswitch(config)# monitor session 1

Configure destination port (destination cannot be a FEX port or a Port-channel!)
=================================
9kswitch# conf t
9kswitch(config)# interface eth 1/15
9kswitch(config-if)# switchport monitor
9kswitch(config-if)# exit
9kswitch(config)# monitor session 1
9kswitch(config-monitor)# destination interface eth 1/15

Configure source port (or VLAN)
=================================
9kswitch(config-monitor)# source interface eth 1/10
9kswitch(config-monitor)# source interface eth 1/11
or
9kswitch(config-monitor)# source vlan x

Activate a SPAN session
==================================
9kswitch(config)# no monitor session 1 shut

Display SPAN session
==================================
9kswitch# show monitor
or
9kswitch# show monitor session 1

conf t
monitor session 1
exit
int eth 1/15
switchport monitor
exit
monitor session 1
destination int eth 1/15
source int eth 1/10
source int eth 1/11
exit
no monitor session 1 shut

Cisco Nexus 9000: Configuring SPAN

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