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The SOHO 6 uses two methods to determine if the external port
connection is down:
• The link to the nearest router
• A ping to a specified location.
The SOHO pings the default gateway or other location designated
by the administrator. If there is no response, fail-over takes place.
When this feature is activated, these actions automatically occur:
• If the external port (EXT) connection fails, the optional port
(OPT) connection is initiated and used
• If the optional port (OPT) connection fails the external port
(EXT) connection is opened and used
• If both connections fail the SOHO 6 repeatedly tries both
external and optional ports until a connection is made
There is no automatic return to the external port (EXT) if this port
comes back online unless you use PPPoE to assign IP addresses.
Once the fail-over has switched to the optional port (OPT), the
administrator has to change the configuration back to the external
port (EXT) when it comes back online.
If you use PPPoE, you can set an inactivity timeout, which disables
any inactive TCP connections until traffic resumes. For information
on setting up PPPoE, see "Configure the SOHO 6 External
Network for PPPoE" on page 34. If your external port (EXT)
connection fails, the optional port (OPT) connection is initiated and
used. The optional port (OPT) stays connected until the TCP
connection is not active (timeout). When traffic resumes, the
SOHO attempts to connect with the external port (EXT) first. If this
connection is active, the external port (EXT) becomes the active
port again. If the external port (EXT) is still unavailable, the SOHO
attempts to connect with the optional port (OPT).
User Guide
Configure OPT Port Upgrades
45
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