Redundant Twin Mode Example - Control Network Solution eNodeIVTM User Manual

exception that the eNodeIV device must be in manual mode and the NAT WAN address
of the NAT-DDNS router does not have to be entered.
On the DDNS Setup Page, set the DDNS Name of the NAT router, the DDNS Refresh
Time, the DNS Server Names, and Enable DDNS. Click the Submit Changes button. If you
do not have a DDNS domain name for the NAT-DDNS router, you must go to
and register for one.
Verify DDNS is working by doing a manual look up the IP address using either the web or
serial interface. The router's DDNS IP address should show up in the DDNS IP Address
field.
Continue configuring the eNodeIV device in manual mode to add other 852 devices to
its channel etc.

4.7. Redundant Twin Mode Example

Redundant Twin Mode enables two eNodeIV routers to operate as a redundant pair for high
availability applications. This enhanced capability increases reliability and eliminates some
single mode failure sources. This section contains step-by-step instructions on how to set up tha
pair of eNodeIV routers for operation in Redundant Twin Mode.
Check the Twin Setup Page to see if the Twin IP Side Subnet/Node field is set to 0/0.
Check also to see if the Twin LON CN Side Subnet/Node field is set to 0/0. If not you
must first click the Clear Twin CN Config button. Also make sure Twin Mode is OFF.
Set up an IP address, subnet mask, and gateway address for each router. Using a PC,
ping each router to ensure that it is communicating on the IP network.
Set up the 852 interface (either manual or normal mode) for both the routers and add
them to the same 852 channel.
Verify that the routers are configured correctly by checking the Channel Lists on the
routers.
Commission both routers using an appropriate network management tool.
The eNodeIV routers are now ready to be configured for Twin Mode. Because the
routers are connected between the same two channels a loop will be created. The
automatic loop detection on the routers will detect the loop and one of the routers will
stop forwarding. As a result the serial console will print out messages indicating such.
You may disregard these messages as the routers will automatically recover once in twin
mode.
On router A's Twin Mode Setup Page, enter the IP address and port of router B in the
Twin IP Address and Twin IP Port fields. This should be the same IP address and port
used for 852 communications by router B. This step uniquely identifies B as Router A's
Twin.
On router B's Twin Mode Setup Page, enter the IP address and port of router A in the
Twin IP Address and Twin IP Port fields. This should be the same IP address and port
used for 852 communications by router A. This step uniquely identifies A as Router B's
Twin.
September 2011
Copyright © 2011 Adept Systems, Inc. and Control Network Solutions Ltd All Rights Reserved.
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