Set DHCP Lease To One Day
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businessuer
Posts: 134
Ally Member




in Nebula
Let say person logs in 1 jan at 08:00 hrs and logs out at 1 Jan 17:00 hours.
DHCP Lease set to 2 days.
So will the lease expire at 3 Jan 08:00hrs or 17:00 hrs?
Will setting a lease duration of 1 day be too short because the router have to keep "re-learning" mac addresses?
Will it affect the hardware?
DHCP Lease set to 2 days.
So will the lease expire at 3 Jan 08:00hrs or 17:00 hrs?
Will setting a lease duration of 1 day be too short because the router have to keep "re-learning" mac addresses?
Will it affect the hardware?
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Accepted Solution
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businessuer said:
Will setting a lease duration of 1 day be too short because the router have to keep "re-learning" mac addresses?
Will it affect the hardware?In a low-ratio hardware rotation environment (resident people only, two - to five missing person par day on 50-60 persons) having multiple-day lease won't be an issue. If a device come back at the last hours of lease, it will receive the same address.In a hi-ratio hardware rotation (bar, restaurant, commercial space, hotel) shorter the lease time, less wasted addresses waiting to expire.I choose a /23 subnet for the guests wireless network into an hotel with 60 rooms, considering three devices par room plus 180 devices for congress/dining halls (twice the size of the maximum capacity. Lease time 4 hrs.0
All Replies
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You can set the Lease time to 2 minutes and it be fine.
The client can ask for a renew by DHCP by unicast before the lease time and before the client renews by broadcast which reset the lease time.
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Sorry but why is a broadcast necessary?0
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businessuer said:Sorry but why is a broadcast necessary?
Well you need a broadcast to get a IP but if you mean for renewing a IP the client may not send a unicast request and waits till rebinding which is a broadcast and it can ask for a reply from the server to be a broadcast or unicast.
More about DHCP here:
https://lazyadmin.nl/home-network/dhcp-lease-time/
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businessuer said:
Will setting a lease duration of 1 day be too short because the router have to keep "re-learning" mac addresses?
Will it affect the hardware?In a low-ratio hardware rotation environment (resident people only, two - to five missing person par day on 50-60 persons) having multiple-day lease won't be an issue. If a device come back at the last hours of lease, it will receive the same address.In a hi-ratio hardware rotation (bar, restaurant, commercial space, hotel) shorter the lease time, less wasted addresses waiting to expire.I choose a /23 subnet for the guests wireless network into an hotel with 60 rooms, considering three devices par room plus 180 devices for congress/dining halls (twice the size of the maximum capacity. Lease time 4 hrs.0 -
Hi @businessuer,
Just like @PeterUK's explaination and @mMontana's suggestion, you can depend on your envirement to set suitable lease time, DHCP Server pool and subnet.
Zyxel Melen0
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