[VLAN] "show mac" doesn't work when interface added to vlan as tagged member

[keboliu]

Description
add some interface to vlan 100 as tagged vlan member, send some traffic to this interface to make mac address learned, but "show mac" will have some error.

the reason is that in this case the pvid of the interface is 1, all the mac address is learned in vlan 1, but the "SAI_OBJECT_TYPE_VLAN" info for vlan 1 in ASIC DB is NULL:

root@sonic:~# redis-cli -n 1 keys \*ASIC_STATE:SAI_OBJECT_TYPE_VLAN:*
1) "ASIC_STATE:SAI_OBJECT_TYPE_VLAN:oid:0x26000000000012"
2) "ASIC_STATE:SAI_OBJECT_TYPE_VLAN:oid:0x260000000009b0"

root@sonic:~# redis-cli -n 1 hgetall "ASIC_STATE:SAI_OBJECT_TYPE_VLAN:oid:0x26000000000012"
1) "NULL"
2) "NULL"

root@sonic:~# redis-cli -n 1 hgetall "ASIC_STATE:SAI_OBJECT_TYPE_VLAN:oid:0x260000000009b0"
1) "SAI_VLAN_ATTR_VLAN_ID"
2) "100"

[prsunny]

@keboliu , The FDB would be learned with BVID in Key which would have the Vlan ID.
It works for me in master image.

 show vlan brief
+-----------+----------------+-------------+----------------+-----------------------+
|   VLAN ID | IP Address     | Ports       | Port Tagging   | DHCP Helper Address   |
+===========+================+=============+================+=======================+
|      2001 | 1.1.10.1/24    | Ethernet28  | tagged         |                       |
+-----------+----------------+-------------+----------------+-----------------------+

show mac
  No.    Vlan  MacAddress         Port        Type
-----  ------  -----------------  ----------  -------
    1    2001  24:8A:07:A3:09:07  Ethernet28  Dynamic

127.0.0.1:6379[1]> KEYS *FDB*
1) "ASIC_STATE:SAI_OBJECT_TYPE_FDB_ENTRY:{\"bvid\":\"oid:0x2600000000062d\",\"mac\":\"24:8A:07:A3:09:07\",\"switch_id\":\"oid:0x21000000000000\"}"
127.0.0.1:6379[1]> HGETALL "ASIC_STATE:SAI_OBJECT_TYPE_VLAN:oid:0x2600000000062d"
1) "SAI_VLAN_ATTR_VLAN_ID"
2) "2001"

Are you sending untagged packets on a tagged port? If so, is it for some layer 2 traffic test? Can you explain the test?

[keboliu]

@prsunny yes, I was sending untagged traffic to this port. It's not a traffic test, just want to verify the mac learning behavior. what would be the expected behavior in this case?