SW: S9300 V100R002C00SPC002.
After configuring port link-type trunk and pvid vlan, outbound traffic in pvid vlan is tagged with pvid vlan on observing port.
port link-type trunk
port trunk pvid vlan 1631
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 1631 2131 2631 2881 3131 3631
port-mirroring to observe-port 1 both
dhcp option82 insert enable
In attachments - packets captures from mirroring port.
1. Check pakets on observing port - they are tagged.
2. Check packets on mirrored port - they are untagged, according default vlan configuration.
3. Ask HQ for solution: HQ answered - it is device desing, packets are send to observing port before vlan tag is deleted from them.
Packets which should be untagged - are transmitted in tagged mode.
Update documentation section about traffic mirroring configuration - all packets on observing port will be tagged, because packets are send to observing port before vlan tag is deleted from them.