Q-in-Q - 802.1q tunneling Feature ICX 7150 ICX 7250 ICX 7450 ICX 7550 ICX 7650 ICX 7850 802.1ad (Q-in-Q) tagging 08.0.60 08.0.30 08.0.20 08.0.95 08.0.70 08.0.90 Q-in-Q BPDU tunneling 08.0.70 08.0.70 08.0.70 08.0.95 08.0.70 08.0.90 Selective Q-in-Q 08.0.70 08.0.70 08.0.70 08.0.95 08.0.70 08.0.90 Parent topic: Layer 2 Switching