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What if command (ethtool) to flash physical ports on NIC does not work? How can I identify which of the live ports are flapping?

cn flag

I have 2 live ports and one of which has network flapping issue. ethtool -p runs but does not flash my ports. What else can I do without pulling the wrong fiber?

mforsetti avatar
tz flag
read the label on the cable, I mean, you did label all your cabling, yes?
peacht avatar
cn flag
The standard label given there just makes the cable unique for tracing physically from switch to server. Any other workarounds?
mforsetti avatar
tz flag
ID the servers via the labels. OS will have flapping interfaces logged in syslog.
peacht avatar
cn flag
Yes I have the logs and the interface names already, thing is both are still live observed physically. How do I be sure I’m pulling the flapping port if the ethtool command doesnt work for my server. Basically looking for an alternative for ethtool -p
mforsetti avatar
tz flag
`ethtool -p` requires the driver to be able to control the LEDs, and not all drivers include them. probably try your NIC-specific driver or executable to do that.
peacht avatar
cn flag
Hmm meaning to say without that there is no other way?
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