Fisrt of all, thanks everybody.
I'have been facing a problem of lost of connectivit at ethernet interface.
I'm using 2 Aironet 1310 as bridge between 2 buildings. The wireless configuration is OK.
It is an intermmitent problem. Sometimes all computers at the remote building lost the connectivit with the main building (DHCP, Internet) and we can't ping the remote Radio. Neither of the remote building where it are fixed.
But at the main building when I open the Radio web page, the event log show me that the radio interface is up and associated with other radio.
I'don know if is a hardware problem, when I do "sh interfaces" it's seens that all is ok.
Anyone could help me.