>[оверквотинг удален]
> state to down
> Dec  8 11:23:23.801: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state
> to down
> Dec  8 11:23:24.301: DHCPD: checking for expired leases.
> Dec  8 11:23:24.809: %LINK-3-UPDOWN: Interface FastEthernet3, changed state to down
> Dec  8 11:23:26.445: %DTP-5-TRUNKPORTON: Port Fa3 has become dot1q trunk
> Dec  8 11:23:27.933: %LINK-3-UPDOWN: Interface FastEthernet3, changed state to up
> Dec  8 11:23:28.933: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet3, changed
> state to up
> выглядет как будто все по фентшую =)

выглядит странно. откуда взялся Vlan 2 ?

int f3
switchport mode access
switchport nonegotiate