-| ... | Test suite uses 2-node topology TG - DUT1 - TG with two links
-| ... | between nodes as well as 3-node topology TG - DUT1 - DUT2 - TG
-| ... | with one link between nodes. Test packets are sent in both directions
-| ... | and contain Ethernet header, IPv4 header and ICMP message. Ethernet
-| ... | header MAC addresses are matching MAC addresses of the TG node.
+| ... | *(Top) Network Topologies:* TG=DUT1 2-node topology with two links
+| ... | between nodes; TG-DUT1-DUT2-TG 3-node circular topology with
+| ... | single links between nodes; TG=DUT1=DUT2=TG 3-node circular
+| ... | topology with double parallel links and TG=DUT=VM 3-node topology
+| ... | with VM and double parallel links.
+| ... | *(Enc) Packet Encapsulations:* Eth-IPv4-ICMPv4 for L2 switching of
+| ... | IPv4; Eth-IPv6-ICMPv6 for L2 switching of IPv6 use. Both apply
+| ... | to all links.
+| ... | *(Cfg) DUT configuration:* DUT1 and DUT2 are configured with L2
+| ... | bridge-domain (L2BD) switching combined with static MACs; MAC
+| ... | learning enabled and Split Horizon Groups (SHG) depending on
+| ... | test case.
+| ... | *(Ver) TG verification:* Test ICMPv4 (or ICMPv6) Echo Request packets
+| ... | are sent in both directions by TG on links to DUT1 and DUT2; on
+| ... | receive TG verifies packets for correctness and their IPv4 (IPv6)
+| ... | src-addr, dst-addr and MAC addresses.
+| ... | *(Ref) Applicable standard specifications:*