The Envoy Is Using A Static Ip And Cannot Get A Web Connection; Lcd Periodically Shows "-Web" For Minutes Or Hours At A Time; Lcd Shows A Valid Ip, But Also Shows "-Web; The Router Or Dsl Modem At The Site Has Only One Ethernet Port - enphase M250 Troubleshooting Manual

The Envoy connects to these servers using their DNS names. If you add firewall rules for Envoy
reporting, Enphase recommends using the DNS names rather than the underlying IP addresses as
the IP addresses are subject to change without notice.
WARNING: Do not change the Envoy DHCP setting to use a static IP address unless you
also reserve the same IP address on the broadband router. See the section on DHCP
Reservations in your router's setup manual. Failure to reserve the static IP address on the
router results in duplicate IP addresses and intermittent Internet connection problems with the
Envoy.

The Envoy is using a static IP and cannot get a web connection

If the site owner prefers not to use DHCP, set up the Envoy to use a static IP address.
 Use the Envoy's web interface to navigate to the Administration page. The Username is "admin",
and password is "admin". Click the "Network Connectivity" menu item. This allows you to see if
the Envoy is using DHCP or static IP, and allows you to change this setting if needed.
 Click "Check Network Connectivity" to view the Envoy connections.
WARNING: Do not change the Envoy DHCP setting to use a static IP address unless
you also reserve the same IP address on the broadband router. See the section on
DHCP reservations in the router instructions. Failure to reserve the static IP address on
the router will result in duplicate IP addresses and intermittent Internet connection
problems with the Envoy.
For more information on how to use the Envoy Interface, refer to the Envoy Installation and Operation
Manual at http://www.enphase.com/support.

LCD periodically shows "-Web" for minutes or hours at a time.

If the Envoy LCD intermittently shows a good IP and "+Web", but periodically shows "-Web" for minutes or
hours at a time.

The Internet service may be dropping out periodically. Does this happen with other Internet-
connected devices at the premises? If so, contact the ISP.

Does the Envoy connection drop when another device at the premises obtains an Internet
connection? If so, a switching device at the premises is likely allowing only one Internet
connection at a time. Check the router for this limitation.

If using an Ethernet CAT5 cable between the Envoy and router, try replacing this cable.

LCD shows a valid IP, but also shows "-Web"

The Envoy has no connection to the Enlighten software platform. The LCD shows a valid IP (something
other than 169.254.120.1), but also shows "-Web".
 The Envoy is waiting for a response from Enlighten, and will likely show "+Web" soon. Wait a few
minutes longer.

Check that the Envoy is connected to a broadband router and not a hub or switch.

The router or DSL modem at the site has only one Ethernet port

If the site has only a single-port DSL modem and the system owner's computer is already using that port,
choose from the following solutions:
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 2014 Enphase Energy Inc.
Troubleshooting an Enphase System
August 2014