-| VPP can push and pop two VLAN tags to traffic transfering through xconnect
-| | [Documentation] | Push two tags on DUT 1 to traffic sent from TG,
-| | ... | pop two tags on DUT 2 from this traffic
-| | ... | and receive untagged traffic on TG.
-| | ...
-| | Given Node path computed for 3-node topology
+| TC01: DUT1 and DUT2 with L2XC and two VLAN push-pop switch ICMPv4 between two TG links
+| | [Documentation]
+| | ... | [Top] TG-DUT1-DUT2-TG. [Enc] Eth-dot1ad-IPv4-ICMPv4 on \
+| | ... | DUT1-DUT2, Eth-IPv4-ICMPv4 on TG-DUTn. [Cfg] On DUT1 and DUT2
+| | ... | configure L2 cross-connect (L2XC), each with one interface to TG
+| | ... | and one Ethernet interface towards the other DUT; each DUT
+| | ... | pushes two VLAN tags on packets received from local TG, and
+| | ... | popping two VLAN tags on packets transmitted to local TG. [Ver]
+| | ... | Make TG send ICMPv4 Echo Req in both directions between two of
+| | ... | its interfaces to be switched by DUT1 and DUT2; verify all
+| | ... | packets are received. [Ref] 802dot1ad.
+| | Given Path for 3-node testing is set