You can configure one or more ports of an ESRP domain where ELRP packet transmission is requested by ESRP. This allows the ports in your network that might experience loops, such as ports that connect to the master, slave, or ESRP-aware switches, to receive ELRP packets. You do not need to send ELRP packets to host ports.
By default, all ports of the ESRP domain have ELRP transmission enabled on the ports.
If you change your network configuration, and a port no longer connects to a master, slave, or ESRP-aware switch, you can disable ELRP transmission on that port.