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SPAN on Nexus is not working

manisha.sharma
Level 1
Level 1

Hi Experts,

i tried to configure SPAN on Nexus 9k. Nexus has 10G port and the destination device (my laptop has wireshark) is connecting with 1G port.

I configured this on destination port:

interface Ethernet1/15
description Node - 15 - Nic
switchport
switchport mode trunk
switchport monitor
no shutdown

monitor session 1
source interface port-channel45 both
destination interface Ethernet1/15
no shut

and destination device has IP from one vlan. but i couldn't go out of this trunk port.

Is there any configuration problem ?

Please help.

1 Reply 1

Andrea Testino
Cisco Employee
Cisco Employee

Manisha,

Your configuration is fine as far as the SPAN session goes. However, you cannot expect to have network connectivity on any device that is connected to a port that is configured as a SPAN destination. When traffic ingresses a SPAN destination port on a Nexus, we will drop it on ingress - This is correct and expected behavior.

Hope that helps.

- Andrea

- Andrea, CCIE #56739 R&S
Review Cisco Networking for a $25 gift card