L-IP User Manual
86
LOYTEC
Version 6.1
LOYTEC electronics GmbH
well with larger networks. We do not recommend this operating mode for IP channels with
more than 10 IP-852 devices and packet rates of more than 500 packets/s. Please use the
configured router mode from Section 7.1.1 for larger IP channel configurations.
Further, it is recommended to configure a multi-cast group for routers in the smart switch
mode to reduce the traffic burden and improve scalability. Refer to Section 7.4 on how to
configure the device to use multi-cast.
7.1.3 Store-and-Forward Repeater Mode
The L-IP can be configured to operate in a repeater mode, where all messages are
forwarded regardless of the address format. To put the L-IP into repeater mode the
following steps need to be performed:
DIP-switch number 1 must be on, refer to the installation sheet of the product.
DIP-switch number 2 must be off, refer to the installation sheet of the product.
The forwarding tables must be reset by pressing the status button for at least 20 seconds
(see Section 4.5.1).
Figure 81 shows the proper DIP-switch settings for repeater mode, assuming all other DIP
switches remain in the factory default position. The series “C” L-IP models do not have DIP
switches.
off
on
1 2 3 4 5 6 7
Figure 81: ON-OFF: DIP-switch settings for repeater mode.
This operating mode uses the “channel routing” strategy on the IP channel to distribute IP
packets. It uses flooding to send all packets on the IP channel to all IP devices on this IP
channel. The advantage of this operating mode is that it is fully plug&play and no router
configuration is required. The disadvantage is that this operating mode doesn’t scale very
well with larger networks. We do not recommend this operating mode for IP channels with
more than 10 L-IP devices and packet rates of more than 500 packets/s.
Further, it is recommended to configure a multi-cast group for routers in repeater mode to
reduce the traffic burden and improve scalability. Refer to Section 7.4 on how to configure
the device to use multi-cast.
7.1.4 Smart Switch Mode with No Subnet Broadcast Flooding
This operating is the same as the smart switch mode from Section 7.1.2 with the only
difference that subnet wide broadcasts are not flooded in this mode. This operating mode
can be used in large network installations where the network management tool uses group
overloading to replace group addresses with subnet wide broadcasts. In this operating mode
the network installer must ensure that one subnet address may only exist behind one and no
more than one network port. This condition is met if nodes are installed, using an LNS
based tool, on different channels that are separated either with a router shape or with an
L-IP LonMaker shape provided by LOYTEC. Please download the L-IP LonMaker shapes
from our website at www.loytec.com.
Figure 82 shows the proper DIP switch settings for smart switch mode without subnet
broadcast flooding, assuming all other DIP switches remain in the factory default position.
The series “C” L-IP models do not have DIP switches.