Verify VLAN Identifiers

When CA Application Delivery Analysis assigns tagged VLAN traffic on a logical port to a domain, we recommend that you verify the traffic which is mirrored to the logical port is tagged properly. Make sure:

VLAN traffic is tagged in both directions.
To properly compute 1-minute metrics, the logical port must receive tagged VLAN traffic between both the server and the client. The Analysis page does not report 1-minute metrics for sessions that are only tagged in a single direction.

If only one direction has VLAN tags:
- Under TCP conversations, sessions are listed with no metrics except one packet in either the To or From direction.
- On the Analysis page, the traffic is reported as two separate, one-way sessions.
VLAN traffic is tagged with a single VLAN identifier.
Multi-Port Monitor identifies VLAN traffic by the first VLAN identifier in the packet header. If your traffic is tagged with more than one VLAN identifier, and the order of the VLAN identifiers varies, Multi-Port Monitor cannot properly monitor the traffic.