2.2.4.1.1.2.4.45 TTL

The TTL element specifies the time, in hours, during which the settings remain valid. It is an optional child element of the Protocol element (section 2.2.4.1.1.2.4).

A value of "0" (zero) indicates that rediscovery is not required. If the TTL element is omitted, the default value is "1".

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