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Mesh routing can be enabled, disabled, or set to custom. Enable mesh routing to
allow a SNAP Link device to participate as a node in a wider SNAP mesh network.

Mesh Routing Maximum

Timeout

If you set Mesh Routing to custom, then the maximum age, in milliseconds, can
be speciﬁed here. The default value should cover most network topologies and
should be changed only under the direction of technical support. Be careful
when changing these values on remote nodes as you could make it impossible to
communicate with the node remotely.

Mesh Override

If you set Mesh Routing to custom, then check this box to indicate mesh
override. This means to use mesh routing, but not to route for other nodes in the
network.

Multi

-Cast Forwarded

Group

Select ―On‖ to have the connected SNAP Link adapter re

-transmit or re-

broadcast any communications it receives from the Master. This is typically
enabled on a SNAP Link client mode adapter located approximately halfway
between the Master unit and the SNAP Link adapter client that exhibits poor
transmission signal strength behavior as documented in the chapter called
Troubleshooting.

Mesh Routing Initial Hop

Limit

Select ―One‖ to have the connected SNAP Link adapter limit Hops to ―1‖. A hop
limit of ―1‖ directs a SNAP Link unit to request routing paths from other SNAP
devices one hop away. It will automatically attempt to discover a routing path up
to ﬁve hops away, if this initial one hop discovery fails. By setting this parameter
to zero (―0‖), you are telling the SNAP Link attached adapter to attempt sending
a packet directly to the address ﬁrst, before seeing if there is a route path to get
to him. This setting is most useful when fast timing is required and you are
pretty sure they are within one hop distance.

Mesh Reject Link Quality
From (dBm)

The Mesh Reject Link Quality slider allows you to require the minimum signal
strength, as measured in dBm strength, that the

connected SNAP Link adapter is

allowed to use for transmitting to a neighboring node, even if the neighboring
node is the Master device.

WARNING: setting this slider to the far right could result in an oddly
behaving mesh network, including no connection

success at all. dBm is a

logarithmic setting from 0 to

-127 and the slide allows you to require the

minimum signal strength to be between -100 (weak) to -50 (very strong).

Sliding it to the left may allow more packets to become lost, never

arriving at its

destination. Sliding it to the right will decrease the number

of these dropped packets, but may result in no communication at all if

set too far to the right.

Multicast TTL

(Master Setting)

Multicast Time

Live parameter only needs to be set on the SNAP Link adapter

designated as the Master. As discussed in other sections, Master transmissions
use the Multicast protocol in order for multiple clients to all receive the Master

transmissions.

By default, Multicast TTL has been set to ―1‖, which means that

even if a Client adapter’s Mesh Routing Initial Hop Limit is set to ―On‖, they will

SNAP Link