GridRouter™ User Guide
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7.3 Ethernet Data Concentrator to NES
The Ethernet Data Concentrator (EDC) is slightly different than a “normal” Ethernet device. As with the
serial Data Concentrator, the EDC alerts the head-end server when its IP address changes. If the
GridRouter has a static WAN address then a static local address can be assigned to the EDC and
everything will work like a “normal” Ethernet device. If the GridRouter has a dynamic IP WAN IP address
then the GridRouter has to routinely alter the local IP address assigned to the EDC so that it will call into
the head-end server. The EDC
must
be set up for DHCP, else this will not work.
The GridRouter will statically assign an IP address to the EDC based upon its MAC address. The
leasetime is set to 5m so the EDC will request an IP frequently. If the GridRouter WAN address changes,
it will change the IP address assigned to the EDC.
The steps required to set up the GridRouter to connect to an EDC are as follows:
1. Attach an Ethernet cable (straight or crossover) between the EDC and the GridRouter’s Ethernet
port.
2. Visit the web-based utility’s Network > DHCP screen.
3. Create a Static IP address rule
a. Set the name (no spaces)
b. Enter the MAC address in the form aa:bb:cc:dd:ee:ff
c. Select a local IP address to assign to the EDC. Make sure it is on the same subnet as
the GridRouter.
d. Select “Echelon DC” as the Device Type.
e. Provide a Start IP Address. This should be the same as the IP address from above.
f.
Provide an End IP Address that is roughly 10 addresses larger than the start. The range
can be as small as 2 but is recommended at 10.
g. Set the leasetime to something around 5 minutes. This is essentially the maximum
amount of time that the EDC will be waiting before it contacts the head-end server after a
WAN IP change.
4. Click Save Changes. Wait for page refresh.
5. Visit the web-based utility’s Network > Firewall screen.
6. Add Port Forwarding rules so that the NES software can reach the EDC through the GridRouter’s
firewall. Be sure to set the “Static IP Rule” equal to the name of the DHCP name provided earlier.
This value is in a drop down.
7. Click Save Changes. Wait for page refresh.
8. Click Apply Changes & Reboot.