V100 Link Bouncing continuously

From: Karl Correia (karl.correia@orange.net)
Date: Fri Dec 05 2003 - 06:47:45 EST


I help look after several hundred various bits of Sun Equipment - our particular problem lies with a strange occurence on some v100's - All Solaris 8 generic 108528-17. Nothing on the surface seems apparently wrong but when checking the system logs shows the interface dmfe0 continuously flapping within milliseconds - this occurs for hours. Network switches / routers etc are all confirmed OK (other boxes plumbed into these as well so cant really be related to this. Has anyone ever seen this sort of behaviour before and if so what was the cause?

Dec 5 10:44:52 spc709121 dmfe: [ID 247303 kern.notice] NOTICE: dmfe0: PHY 1 link down
Dec 5 10:44:53 spc709121 dmfe: [ID 297357 kern.notice] NOTICE: dmfe0: PHY 1 link up 100 Mbps Full-Duplex
Dec 5 10:44:54 spc709121 dmfe: [ID 247303 kern.notice] NOTICE: dmfe0: PHY 1 link down
Dec 5 10:44:56 spc709121 dmfe: [ID 297357 kern.notice] NOTICE: dmfe0: PHY 1 link up 100 Mbps Full-Duplex
Dec 5 10:44:58 spc709121 dmfe: [ID 247303 kern.notice] NOTICE: dmfe0: PHY 1 link down
Dec 5 10:44:59 spc709121 dmfe: [ID 297357 kern.notice] NOTICE: dmfe0: PHY 1 link up 100 Mbps Full-Duplex
Dec 5 10:45:05 spc709121 dmfe: [ID 247303 kern.notice] NOTICE: dmfe0: PHY 1 link down
Dec 5 10:45:06 spc709121 dmfe: [ID 297357 kern.notice] NOTICE: dmfe0: PHY 1 link up 100 Mbps Full-Duplex
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