About the Radio | 37
Aprisa SR+ User Manual 1.11.1
Network Layer
Packet Routing
Aprisa SR+ is a standard static IP router which routes and forwards IP packet based on standard IP address
and routing table decisions.
Aprisa SR+ router mode (see figure below), enables the routing of IP packets within the Aprisa SR+ wireless
network and in and out to the external router / IP RTUs devices connected to the Aprisa SR+ wired Ethernet
ports.
Within the Aprisa SR+ Router mode, each incoming Ethernet packet on the Ethernet port is stripped from
its Ethernet header to reveal the IP packet and to route the IP packet based on its routing table. If the
destination IP address is one of the RTUs, the packet is then forwarded to the wireless ports and broadcasted
as a PMP wireless packet to all the repeater / remotes stations. The appropriate remote then routes the IP
packet and forwards it based on its routing table to the appropriate Ethernet port, encapsulating the
appropriate next hop MAC header and forwarding it to the RTU. The RTU can then interpret and process the
IP data and communication is established between the RTU and the initiating communication device.
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