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Looking to debug 802.3AT PoE+ LLDP power class negotiation frames exchanged between a Non-Cisco PoE-Plus Powered device and a Cisco switch

Is there a dissector already created for this purpose?

If so, is it able to identify/decode the power class requests / responses between a PoE PD (Powered Device) and a PSE (Power Sourcing Equipment - i.e.: a Cisco switch)?

WJR1989's avatar
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WJR1989
asked 2019-06-24 20:47:46 +0000, updated 2019-06-24 20:48:27 +0000
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Is there a dissector already created for this purpose?

Wireshark has an LLDP dissector.

If so, is it able to identify/decode the power class requests / responses between a PoE PD (Powered Device) and a PSE (Power Sourcing Equipment - i.e.: a Cisco switch)?

That dissector includes support for 802.3 TLVs, including the Power Via MDI TLV.

So, if the machine on which you're running Wireshark can capture those frames, Wireshark should be able to dissect them.

Guy Harris's avatar
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Guy Harris
answered 2019-06-24 22:35:07 +0000
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