Resolved! show ip cef x.x.x.x detail
SW1#sh ip cef 2.2.2.2 de2.2.2.2/32, epoch 0, flags [attached]Adj source: IP adj out of Vlan2, addr 2.2.2.2 12F2FA40Dependent covered prefix type adjfib, cover 0.0.0.0/0attached to Vlan2 what does "12F2FA40" mean? thanks.