Linux namespaces created via trex shows vlan within trex but in linux when we check the same it doesn't

[chris...@gmail.com]

I am trex v2.90 stateless.

I am creating linux namespaces with vlan but on linux when i see i dont see the vlans,

Can someone help understand how the namespaces work with vlans?

Server start command : t-rex -i --software 

trex_cfg:

- port_limit : 2
  version: 2
  #c : 3
  interfaces: ['test', 'dummy']
  stack : linux_based
  low_end :  true
  low_end_core : 11

In trex:

========

trex(service)>ns show-node -p 0 --mac 00:00:00:02:03:04

Setting port 0 in with namespace configuration               [SUCCESS]


wait_for_async_results                                       [SUCCESS]

{'nodes': [{'bpf': '',
            'ether': {'src': '00:00:00:02:03:04'},
            'ipv4': {'dst': '2.2.2.11', 'src': '2.2.2.100'},
            'ipv6': {'enabled': False},
            'is-shared-ns': False,
            'is_bird': False,
            'linux-ns': 'trex-a-0-1',
            'linux-veth-external': 'trex-a-0-1-T',
            'linux-veth-internal': 'trex-a-0-1-L',
            'vlan': {'tags': [622], 'tpids': []},
            'vlan_filter': 'no_tcp_udp'}]}
trex(service)>

 In Linux:

========

ip netns exec trex-a-0-1 ip -d link show trex-a-0-1-L
14: trex-a-0-1-L@if15: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9280 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether 00:00:00:02:03:04 brd ff:ff:ff:ff:ff:ff link-netnsid 0 promiscuity 0 minmtu 68 maxmtu 65535
    veth addrgenmode eui64 numtxqueues 64 numrxqueues 64 gso_max_size 65536 gso_max_segs 65535 tso_max_size 524280 tso_max_segs 65535 gro_max_size 65536

No vlan seen here .

Capture in Trex:

==============

I see arp packets coming out with vlan

Capture in ip netns exec trex-a-0-1 tcpdump -i trex-a-0-1-L

================================================

Vlan header not seen in arp packets .

I see the arp resolution failing in DUT , so I am doubting if its because the arp response from linux namespace is missing vlan .

Can someone help clarify ? Am i missing something ?

[chris...@gmail.com]

Here too i don't see the vlan:

ip -d link show trex-a-0-1-T
15: trex-a-0-1-T@if14: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9280 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether 4a:75:62:9d:28:43 brd ff:ff:ff:ff:ff:ff link-netns trex-a-0-1 promiscuity 0 minmtu 68 maxmtu 65535

    veth addrgenmode eui64 numtxqueues 64 numrxqueues 64 gso_max_size 65536 gso_max_segs 65535 tso_max_size 524280 tso_max_segs 65535 gro_max_size 65536

Can someone please help understand,  as to why are the vlans not seen here ?