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It looks like a port authentication issue between the new IP phone and the switch configuration. If it works only when authentication is disabled, the problem is likely in 802.1X or MAC auth settings. You may need to verify credentials, VLAN assignme...
this looks like an 8021x authentication issue on switch port for cp8841 and cp8811 maybe check credentials and radius server config and also reverify mac authentication settings sometimes firmware mismatch can also cause unauthenticated status on ip ...
This looks like it could be a fabric link or transceiver negotiation issue causing the SDP timeout during FEX bringup. Since other FEXs on the same config are working, it’s likely something physical like the SFP type, cable, or port mismatch rather t...
