The SNMP Agent Administrative value of the IP Broadcast
Address for the system.
This value is stored in the system NVRAM.
The current operational IP Adress may be obtained by
accessing the ipAdEntBcastAddr entry in the ipAddrTable
for ipAdEntIfIndex equal to the system interface value.
If the system has no current operational IP Address,
meaning that the access is done out-of-band, then this
value takes effect immediately.
Otherwise it will take effect after a system reset