Posted on April 2, 2019 4:09 pm
 |  Asked by Grant Eastridge
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What type of physical layer events could potentially lead to an interface going to an errdisabled state…within the context of ‘show interface phy details’ counters? We are seeing three of these messages within the switch logs : 3981: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet4 followed by this: Ebra: 3984: %ETH-4-ERRDISABLE: link-interrupt-storm error detected on Ethernet4

Posted by Runxin Wang
Answered on April 4, 2019 4:32 pm

Hi Grant,

Thanks for posting the questions.

For checking the reason of errdisable, you can use the following CLI:
# show interfaces status errdisabled

Link flapping is one possible reason interfaces are disabled. You can use “show mac detail” CLI to get a summary of the states of the interface, phy, “local fault” and “remote fault”. “show phy detail” gives more details but relatively more difficult to interpret.

show mac detail
# show interfaces mac detail

show phy detail
# show interfaces phy details

If you have more questions, you can provide the output of the above CLI, we can have a look.

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