4votes
1 answer
59views
Nexus 5672UP 10GBASE-SR port won't link to a 1G SX peer and shows 'SFP checksum error'
A Cisco Nexus 5672UP fitted with a 10GBASE-SR SFP+ could not connect to another switch that uses a 1000BASE-SX (1 Gbps) transceiver; both ends are multimode optics. When the poster changed the port speed, 'show interface brief' displayed an 'SFP checksum error', and swapping the Nexus optic for a 1…