NETGEAR AV Line M4250 GSM4210PX 8-Port Gigabit PoE+ Compliant Managed AV Switch with SFP (220W) - Manual (Page 392)

11. In the Minimum Advertise Interval field, specify the minimum period in seconds
that is allowed between router advertisements that are sent from the interface.
The period must be in the range from 3 to 1800. The default is 450.
12. In the Advertise Lifetime field, specify the maximum period in seconds that the
address that is advertised by the interface is considered a valid router address by
hosts.
The period must be in the range from 4 to 9000. Default is 1800.
13. In the Preference Level field, specify the preference level of the router interface as
a default router relative to other routers on the same subnet.
A higher number means that the advertized address receives a higher preference.
The default is 0.
14. Click the Apply button.
Your settings are saved.
15. To save the settings to the running configuration, click the Save icon.
Main User Manual 392 Manage Routing
AV Line of Fully Managed Switches M4250 Series Main User Manual