Comandi utili Cisco
Visualizzare le porte in err-disable
show errdisable detect
show interfaces status | incl err-disabled
Mitigazione problemi dhcp windows e conflitto ip causato dal device tracking di windows
ip device tracking probe auto-source fallback 0.0.2.1 255.255.0.0 override
errdisable recovery cause dhcp-rate-limit
Usare sfp o transceiver non Cisco
swXXX(config)#service unsupported-transceiver
Warning: When Cisco determines that a fault or defect can be traced to
the use of third-party transceivers installed by a customer or reseller,
then, at Cisco's discretion, Cisco may withhold support under warranty or
a Cisco support program. In the course of providing support for a Cisco
networking product Cisco may require that the end user install Cisco
transceivers if Cisco determines that removing third-party parts will
assist Cisco in diagnosing the cause of a support issue.
PoE: Visualizzare valori **attendibili** sul consumo di un device
show power inline <interface> detail
DHCP Snooping debugging
show ip dhcp snooping binding interface gigabitEthernet 1/0/22
term mon
debug ip dhcp snooping packet
debug ip dhcp snooping event
debug ip dhcp snooping agent
no debug all
term no mon
802.1x
show auth sessions interface Gi1/0/25 details