User's Manual

Chapter 7: Configuration
General configuration
Page 7-75
SM Isolation
Prevent or allow SM-to-SM communication by selecting from the
following drop-down menu items:
Disable SM Isolation (the default selection). This allows full
communication between SMs.
Block SM Packets from being forwarded. This prevents both
multicast/broadcast and unicast SM-to-SM communication.
Block and Forward SM Packets to Backbone. This not only prevents
multicast/broadcast and unicast SM-to-SM communication but also
sends the packets, which otherwise are handled SM to SM, through the
Ethernet port of the AP.
Forward Unknown
Unicast Packets
Enabled: All unknown Unicast packets (no entry in the AP’s bridge table)
received via the AP’s Ethernet LAN interface are forwarded to registered
SMs. If the target device is situated beneath a particular SM, when the
device responds the SM and AP will learn and add the device to their
bridge tables so that subsequent packets to that device is bridged to the
proper SM.
Disabled: All unknown Unicast packets (no entry in the AP’s bridge table)
received via the AP’s Ethernet LAN interface are discarded at the AP.
Update Application
Address
Enter the address of the server to access for software updates on this AP
and registered SMs.
Prioritize TCP ACK
To reduce the likelihood of TCP acknowledgement packets being
dropped, set this parameter to Enabled. This can improve throughput
that the end user perceives during transient periods of congestion on the
link that is carrying acknowledgements. This parameter, when enabled,
can be particularly useful when running bi-direction FTP sessions over
the link. If a link is primarily used for video surveillance, it is
recommended to set this parameter to Disable.
Multicast Destination
Address
Using Link Layer Discovery Protocol (LLDP), a module exchanges
multicast addresses with the device to which it is wired on the Ethernet
interface. Although some switches (CMM4, for example) do not pass
LLDP addresses upward in the network, a radio can pass it as the value
of the Multicast Destination Address parameter value in the connected
device that has it populated.
DHCP Relay Agent
The AP may act as a DHCP relay for SMs and CPEs underneath it. The AP
will make use of the DHCP Option 82 (DHCP Relay Agent Information)
from RFC 3046 when performing relay functions. The AP offers two
types of DHCP relay functionality:
Full Relay Information. Configuring the DHCP Full Relay Operation will
take broadcast DHCP packets and send them to a Unicast server in
unicast mode. This way the DHCP requests and replies can be routed like
any other UDP packet.
Only Insert Option 82. This option leaves the DHCP request on its
broadcast domain as opposed to DHCP Full Relay Operation which will
turn it into a unicast packet.