Network /22 problem

General
1

Good morning
I have a problem, I hope you can help me.

Now I have a /24 network with Peplink b One. The Peplink B One has LAN ip = 192.168.1.254.

Everything works fine.

Now I do NOT have an active DHCP and I have all the static ip of the PCs from 192.168.1.1 to 192.168.1.254.

But NOW i need to activate a WiFi without security or anything. I need it to keep online about 700 devices.

So I went to change the subnet from /24 to /22.

On a calculator I saw that I have to set the IPs =
192.168.0.1 - 192.168.3.254

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If I do it I get the error:
“DHCP IP Range cannot include LAN IP Address (192.168.1.254)”

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I understand the error. DHCP can’t contain the ip 192.168.1.254

Question:
But then how can I have these 700 ip to use in dhcp?

Thanks

2

The Balance LAN IP address must be outside the DHCP address range. If the 192.168.1.1–254 range is reserved for static IPs, then you could use a DHCP range such as 192.168.2.1–192.168.4.254 (/21 subnet).

Alternatively, you can create a separate subnet using a VLAN only for Wi-Fi clients.

Also for B One recommended network size is 1-150 users.

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3

Good evening
Thank you very much for your reply!

It seems incredible to me that to use DHCP with that number of clients I have to switch to /21! It is very clear to me anyway! I am looking at the calculator, I would still have space for more IPs!:

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Thank you for telling me that Balance is recommended for up to 150 users. Do you know what the two products are just at B One? We will do some reasoning to understand if we can change the B One…thanks

4

The error is because your router’s IP will lie in the new DHCP range. You need to change it. I.e. set router IP to 192.168.0.1, DHCP range to 192.168.0.2-192.168.3.254. or router IP to 192.168.3.254, DHCP range to 192.168.0.1-192.168.3.253.

5

thanks for the answer, unfortunately I can’t change the router’s IP, otherwise I would have to change all the parameters of the PCs with static IP! I’m fine with the answer from @Saulius_Saltmeris

6

Sorry, someone answer this question of ours:

Thanks for telling me that Balance is recommended for up to 150 users. Do you know what the two products of B One are? We will reason to understand if we can change B One… thanks.

7

If looking only to requirement for support 700 concurrent users: Balance 580/580X, SDX/SDX Pro or higher models. However, I recommend to reach out your Peplink partner where they could suggest the best model for your topology and overall requirements.

1 Like