+| Documentation | *L2 cross-connect test cases*
+| ...
+| ... | *[Top] Network Topologies:* 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
+| ... | cross-connect (L2XC) switching.
+| ... | *[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:*