Nexus 9K span port configuration resulted in port down

[Sunshine East]

Hi there,

I would like to ask about an issue I faced with ERSPAN. I configured span on N9K for traffic in/out to Nexus 3K which has a dual vpc link to the  N9K. As soon as I configured it (see below config) the port-channel went down and lost connectivity to N3K. 

I am wondering why ERSPAN would bring interface down or if there is something wrong in my config. 

N9K config:

interface po10
switchport monitor
exit

monitor session 10 type erspan-source
  erspan-id 10
  destination ip 10.54.32.17
  source interface port-channel10 both

[Sergiu.Daniluk]

Hi @Sunshine East 

Did you configured the ERSPAN source IP?

switch(config)# monitor erspan origin ip-address 10.0.0.1 global

Sergiu

[Hanfeng Cai]

Pls follow this config example:

monitor session 1 type erspan-source
    erspan-id 1
    vrf default
    destination ip 76.1.1.2
    source interface Ethernet1/53 both
    no shut

monitor erspan origin ip-address 12.1.1.1 global

[Dawei]

You don't need to configure "switchport monitor" under the ERSPAN source port. This command is use for destionation port of the local SPAN.