EXFO FTB-8500 Series for FTB-500 - Manual (Page 502)

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488 FTB-8500 Series and FTB-8120NGE/8130NGE
IPv6 Address Configuration
Default Gateway Address
The Default Gateway Address is used to forward packets outside the
subnet. Default Gateway Address is not available when the Global IPv6
address Mode is set to None.

Mode

Automatic allows automatic selection of the default gateway.

Static allows entering the default gateway IP address. The default
address is FE80::.

Default Gateway Address Status
Status Description
-- Undefined
Checking Detection in progress to determine if the Default
Gateway is reachable or not.
Unreachable Default Gateway is unreachable.
Reachable
Default Gateway is reachable.