> On 30 Apr 2019, at 13:46, Berna Demir <berna.demirs...@gmail.com> wrote: > > Hi > > I've used following commands to span packets of vlan sub_interface > to a tap interface, but nothing captured on tap interface in Linux. > > vpp_api_test> create_vlan_subif GigabitEthernet3/0/0 vlan 2100 > > vppctl> > set interface state GigabitEthernet3/0/0 up > set interface state GigabitEthernet3/0/0.2100 up > set interface state GigabitEthernetb/0/0 up > set interface ip address GigabitEthernet3/0/0.2100 192.168.111.1/24 > <http://192.168.111.1/24> > set interface ip address GigabitEthernetb/0/0 192.168.222.1/24 > <http://192.168.222.1/24> > tap connect test > set interface state tapcli-0 up > set interface span GigabitEthernet3/0/0.2100 both destination tapcli-0 > > In the bash: > #> tcpdump -nn -e -i test > > Do you have any idea?
By definition, SPAN is per-port feature, so it can be only applied to physical ports. It grabs packets before ethertype/dot1q lookup happens.
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