-- *l2bdbase*: low number of L2 flows (254 per direction) is switched by
- VPP. They drive the content of MAC FIB size (508 total MAC entries).
- Both source and destination MAC addresses are incremented on a packet
- by packet basis.
-
-- *l2bdscale*: high number of L2 flows is switched by VPP. Tested MAC
- FIB sizes include: i) 10k (5k unique flows per direction), ii) 100k
- (2x 50k flows) and iii) 1M (2x 500k). Both source and destination MAC
- addresses are incremented on a packet by packet basis, ensuring new
- entries are learn refreshed and looked up at every packet, making it
- the worst case scenario.
+- *l2bdbase*: Two MAC FIB entries are learned by VPP to enable packet
+ switching between two interfaces in two directions. VPP L2 switching
+ is tested with 254 IPv4 unique flows per direction, varying IPv4
+ source address per flow in order to invoke RSS based packet
+ distribution across VPP workers. The same source and destination MAC
+ address is used for all flows per direction. IPv4 source address is
+ incremented for every packet.
+
+- *l2bdscale*: A high number of MAC FIB entries are learned by VPP to
+ enable packet switching between two interfaces in two directions.
+ Tested MAC FIB sizes include: i) 10k with 5k unique flows per
+ direction, ii) 100k with 2 x 50k flows and iii) 1M with 2 x 500k
+ flows. Unique flows are created by using distinct source and
+ destination MAC addresses that are changed for every packet using
+ incremental ordering, making VPP learn (or refresh) distinct src MAC
+ entries and look up distinct dst MAC entries for every packet. For
+ details, see :ref:`packet_flow_ordering`.