UDLD - Uni-Directional Link Detection Feature ICX 7550 ICX 7650 ICX 7850 ICX 8100 ICX 8200 Unidirectional Link Detection (UDLD) (Link keepalive) 08.0.95 08.0.70 08.0.90 10.0.10f 10.0.00 UDLD on tagged ports 08.0.95 08.0.70 08.0.90 10.0.10f 10.0.00 Parent topic: Layer 2 Switching