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chaotix360
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ISP WAN / LAN router settings

I'm trying to setup up a router behind a DSL connection, with static IP. The ISP sent me the following information, and I can't figure out what it means (changed but similar).

For Customer WAN they are providing a class C IP:

Customer WAN 220.220.220.50/32
Gateway 220.220.220.1
usable  220.220.220.50
Subnet Mask 255.255.255.0

Then for the customer LAN they switch to a Class A IP:

Customer LAN 22.22.22.0/30
Gateway 22.22.22.1
Usable 22.22.22.2
Subnet Mask 255.255.255.252

I don't get what the external static IP of the router should be, and how any of those default gateways could possible be the local modem....
RoutersNetwork ArchitectureNetworking Protocols

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chaotix360

8/22/2022 - Mon
SJH01

Customer WAN 220.220.220.50/32
Gateway 220.220.220.1
usable  220.220.220.50
Subnet Mask 255.255.255.0

Note: based on the CIDR, the subnet mask should be 255.255.255.255

good luck and post your updated comments.
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Darr247

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chaotix360

ASKER
Wow. Thanks, I actually missed the /32 altogether. I think I have a good grasp of the picture now. I should've mentioned my router will be behind the ISP's modem device. So based on your post:

ISP Modem External Interface: 220.220.220.50 ----w/ GW 220.220.220.1
ISP Modem Internal Interface: 22.22.22.1

Available Static IP for my router: 22.22.22.2
Gateway for my router: 22.22.22.1
Subnet for my router: 255.255.255.252

Am I grasping this correctly now?
Darr247

> Gateway for my router: 22.22.22.1

That would be the gateway you specify in the router's DHCP server, but since you have only 1 address, I would just disable the DHCP server and assign the IP + gateway/DNS manually.
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chaotix360

ASKER
very good visiualization