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Brocade ICX6450-C12-PD SFP ports stay down: the C12 only does 1G while the peer ICX6450-24P defaults to 10G
The two SFP ports (F1/F2) of a Brocade ICX6450-C12-PD, licensed for 10G, would not come up with either a Brocade 1000BASE-LR SFP (33211-100) or 10GBASE-SR modules over a 5 m single-mode patch to an ICX6450-24P. show media saw the transceivers but the interface reported GigabitEthernet1/3/1 is down…