2960s PoE Port Class Detection Issue

[david.keller]

Connecting Avaya 9611G  IEEE class 1 devices to a Cat2960s.  How ever some of the phone are registering as class 3 devices no matter what interface the phone is connected to. Typical port config is as follows:

interface GigabitEthernet1/0/2

switchport access vlan 25

switchport mode access

switchport nonegotiate

switchport voice vlan 22

srr-queue bandwidth share 1 30 35 5

priority-queue out

mls qos trust cos

auto qos trust

no cdp enable

spanning-tree portfast

Avaya has not been much help.  Upgraed IOS with no resolution

[Leo Laohoo]

no cdp enable

Please enable CDP.

[david.keller]

Enabled cdp and rebooted the phones. Phone still registers as class 3 device.

[Leo Laohoo]

Unfortunately, I'm no Avaya guy so I can't give you any hints there.

You can, however, force the Cisco switch to lower the power being pushed.  Do you want to do this?

[dsolangon]

It depends on the cable length the longer the cable length the higher requirement you can hardcode it

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