Echelon SmartServer 2.2 - Manual (Page 248)

SmartServer 2.2 User’s Guide 249
5. In the Name property, enter a name for the router that is unique to the network (router names are
case sensitive).
6. In the Class property, select one of the following six router types:

Configured. The router determines which packets to forward based on internal routing
tables. These routing tables contain one entry for each subnet and group in the application
domain. Whenever a router receives a packet, it examines the source and destination subnet
or group ID to determine whether to forward the packet. This is the most common type
because it optimizes network traffic for both subnet/node ID and grojup addressed messages,
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.

Learning. 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.

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.

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.

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.

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 bridges. You can
use permanent bridges to preserve subnet IDs.

Select Unknown to have the SmartServer automatically select the appropriate router type.
7. In the Target Channel property, select the channel to be attached to the far side of the router.
8. Click OK. Router icons are added underneath the channels on the near and far sides of the router.
You can expand the router icon to show a reference to the opposite side of the router.
9. Click Submit.