Echelon i.LON SmartServer Technical Information Page 233

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i.LON SmartServer 2.0 Programmer’s Reference
14-33
The <UCPTannotation> property is Router.
The <UCPTuri> property is LON_Device_Router_Cfg.htm.
Note that LON_Device_Router_Cfg has three additional properties:
<Device>
The network path of the channel attached to the far side of the
router in the following format: <network>/<channel>/<router>.
<UCPTrouterClass>
This property specifies one of the following seven router
types:
LCA_CONFIGURED_ROUTER. The router determines
which packets to forward based on internal routing tables.
These routing tables contain one entry for each subnet in
the application domain. Whenever a router receives a
packet, it examines the source and destination subnet ID to
determine whether to forward the packet. This is the
recommended type because it optimizes network traffic and
enables the channels on which devices are attached to be
determined automatically. Configured routers also support
the use of redundant routers (multiple routers connecting
two channels), which provide for redundant message paths
and greater system reliability.
LCA_LEARNING_ROUTER. Like a configured router,
the router determines which packets to forward based on
internal routing tables. Learning routers, though, have their
routing tables stored in volatile memory; therefore, the
router forwards packets addressed to all subnets in the
application domain after being reset. Whenever a learning
router receives a packet from one of its channels, it uses the
source subnet ID to learn the network topology. It sets the
corresponding routing table entries to indicate that the
subnet in question is to be found in the direction from
which the packet was received. A learning router always
forwards all group-addressed messages.
LCA_REPEATER. The router forwards all valid packets
received on one channel to the other channel. Subnets
cannot span non-permanent repeaters. You can use a
non-permanent repeater to maintain flexibility in order to
change the router type later. This is the default.
LCA_BRIDGE. The router forwards all valid packets that
match the network domain. Subnets cannot span
non-permanent bridges. You can use a non-permanent
bridge to maintain flexibility in order to change the router
type later.
LCA_PERMANENT_REPEATER. The router behaves
like a repeater, except that you cannot change the router
type after the router has been created. Subnets may span
permanent repeaters. You can use permanent repeaters to
preserve subnet IDs.
LCA_PERMANENT_BRIDGE. The router behaves like a
bridge, except that you cannot change the router type after
the router has been created. Subnets may span permanent
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