User's Manual

Table Of Contents
Fortress ES-Series CLI Guide: Networking and Radio Configuration
34
Multicast transmit mode
Packet interval
Transmit control
Clamping of multicast video
Mesh routing reactivity
Packet time to live value
Frame processor mode
3.2.3.1 Selecting the FastPath Mesh Multicast Transmit Mode
NOTE: Do not
change the Multi-
cast Transmit Mode
unless you are working
with Fortress technical
support to troubleshoot
a problem.
The multicast transmit mode determines how multicast packets
are transmitted over radio interfaces. Specify the multicast
transmit mode with the
set command:
# set mesh -multicastmode auto|reliable|efficient
When set to
auto
, the multicast mode is determined
automatically. When there is more than one neighbor with an
interested listener behind it, packets are transmitted in
efficient
mode. Otherwise,
reliable
mode is used.
Auto
is
the default multicast mode.
When the multicast mode is
reliable
, multicast packets are
transmitted reliably (that is, multicast packets are transmitted
with the reliability associated with the transmission of 802.11
unicast frames). Each multicast packet is duplicated over every
MRP (Mesh Radio Port) connection. The bandwidth consumed
by multicast packets in this mode is at least ‘n’ times the
bandwidth consumed in the ‘efficient’ mode, where n is the
number of MRP connections.
When multicast mode is
efficient
, multicast packets are
transmitted on a best-effort basis (that is, multicast packets are
transmitted with the reliability associated with the transmission
of 802.11 multicast frames). A single copy of each multicast
packet is placed on the air.
3.2.3.2 Setting the FastPath Mesh Packet Interval
NOTE: Do not
change the Packet
Interval unless you are
working with Fortress
technical support to
troubleshoot a problem.
The FP Mesh packet interval is the time interval in milliseconds
between sending mesh routing protocol control packets. The
default is
auto
. Specify a packet interval in milliseconds with
the
set mesh command:
# set mesh -packetinterval auto|<
100..4000>
In an FP Mesh network with 10 or fewer neighbors, the mesh
responds more quickly to changes with a smaller packet
interval. In an FP Mesh network with more than 20 neighbors,
small packet intervals are impractical due to performance
restrictions. An interval of
600 ms is practical for a mesh
network where a node may have as many as 39 neighbors.