User's Manual Part 1

3: Detailed Description
APCD-LM043-8.0 (DRAFT C) 29
3.3.6 End-user Computer to Internet Data Transmission using Through
Only Mode
1. The EUM receives packets from the end-user’s equipment through the Ethernet port.
2. The EUM checks the port number. If the port is listed in the EUM Port Filter Table, the
packet is discarded.
3. If it is not already in the list, the EUM adds the source Ethernet address to the Bridge
Table, described in Bridge Table (EUM or CCU in Switched Ethernet or Through Only
Mode) on page 242. The EUM determines whether or not the source is entitled to air
access, based on the Bridge Table.
4. If the source is not entitled to air access, the packet is discarded.
5. The EUM checks the destination MAC address. If the destination MAC address
appears in the Bridge Table, meaning the destination is on the Ethernet side, the
packet is discarded.
6. If the destination MAC address is the same as the EUM MAC address, then the
packet is forwarded to the EUM application; otherwise, it is forwarded through the
polling MAC and radio link to the CCU.
7. The CCU receives the packet through the CCU radio port. The CCU either updates or
adds the Ethernet address to the Address Table.
8. The CCU checks the port number. If the port number appears in the CCU Port Filter
Table, the packet is discarded.
9. If the destination MAC address is the same as either the CCU radio or Ethernet MAC
address, the packet is forwarded to the CCU application; otherwise, the packet is sent
out the Ethernet port.
NOTE: Unlike Switched Ethernet mode, the Bridge Table is not checked.
Also, broadcast packets are not sent to the radio interface.
3.3.7 RADIUS Authorization
The Remote Authentication Dial-In User Service (RADIUS) simplifies administration of large
networks.
RADIUS support, through a RADIUS Client in the CCU, enables a remote RADIUS Server to
authorize the WaveRider Grade of Service settings for EUMs on the radio network. Once the
RADIUS Client is configured and enabled on the CCU, the CCU queries the RADIUS server
upon EUM registration and at subsequent operator-defined intervals. Any GOS change
entered in the RADIUS database takes effect after the next query. RADIUS is essentially an
access control protocol enabling you to create a central list of devices that can access the
radio network.