GGSN_Tests.TC_pdp4_act_deact_mtu (from osmo-ttcn3-hacks_ggsn_tests)
"VTY: Unknown Command: mtu 1400 apply" GGSN_Tests.ttcn:2420 GGSN_Tests control part GGSN_Tests.ttcn:1412 TC_pdp4_act_deact_mtu testcase