I am facing a very strange problem with Nortel ERS 8300 Switch. I am using this command
diag mirror-by-port 2 create in-port 2/46 out-port 2/43 mode both ( 2/46 is mirrored port and 2/43 is monitor port)
When I am connecting to 2/43 to take tcp dump, I am getting VLAN ID :4094 in each packet. I found some artcles describing it as security purpose. But I have to disable this.