Network DHCP question

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envo

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I have two DHCP routers, one dishes out on the 172.16.0.1 range with a subnet of 255.255.255.0 (which I don't have access to). The second one (I have full control over) dishes out on the 192.168.88.1 range with subnet 255.255.255.0

I've noticed the IP assignments from the first router starts at 199 and goes higher, not lower. Since I have devices on the one network I'd like to have access to via the network to the other, I was thinking of changing the 2nd router's DHCP assignment to dish out on the 172.16.0.x range, but only between a specific range that should never interfere with any other device that might be connected to it in future, if this will work?

The first router has access to the internet, and the 2nd one is connected to it through it's WAN port. Both are Mikrotik ones. Kind of nifty, would be better If I had access to the first one, then I'd have had all kinds of fancy options to forward or even change the subnet to work on 172.16.x.x so I can have 2 IP ranges that could see each other, but unfortunately I don't.

Would my idea of the 2nd one dishing out on the same range work?
 
if he doesnt have access to the 172 at all, and he currently have 2 DHCP servers running, one on the 172 and one on the 192, so not sure how you're saying this is not possible?
 
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halfmoonforever said:
if he doesnt have access to the 172 at all, and he currently have 2 DHCP servers running, one on the 172 and one on the 192, so not sure how you're saying this is not possible?
Click to expand...

The fact that it's behind a WAN port tells me it's already being NATted but OP isn't aware of that or what it is.

It's two separate networks completely, but OP makes it sound like one.

OP : No you can't just make it the same range. It would make no difference at all or not work.

What are you really trying to accomplish?

I'm guessing you have a WISP WiFi setup and this is their Mikrotik and then you have your own which you use as a router.
 
SauRoNZA said:
What are you really trying to accomplish?

I'm guessing you have a WISP WiFi setup and this is their Mikrotik and then you have your own which you use as a router.
Click to expand...

Pretty much yes. My phone and laptop are connected through the wifi, which runs on the 172 range. But my Xbox/Roku/PC and Mediacenter are all hardwired and goes through the 192 one specifically so I can use Unotelly DNS and block 8.8.8.8 and 8.8.4.4 on the Roku for Netflix.

I just thought it would be nice if I could access my PC / Media center via my Laptop or phone.

I'm not aware that the WAN port might be NAT'ed already, I just plugged the 192 one in there and set it up so I can have my own firewall rules and DNS being dished out as the ISP doesn't want to change those (because apparently they don't want me to think their internet is crappy, even though I admitted I know exactly what impact these changes would have and won't blame them for speed issues, where there would be none since the DNS is local anyway)

So if the 192 one changes to the same range as the 172 one, and it's NAT'ed automagically, surely it would work?
 
Are you saying your router is connected to the WAN port of the upstream router? Or did I misread that?
 
envo said:
Pretty much yes. My phone and laptop are connected through the wifi, which runs on the 172 range. But my Xbox/Roku/PC and Mediacenter are all hardwired and goes through the 192 one specifically so I can use Unotelly DNS and block 8.8.8.8 and 8.8.4.4 on the Roku for Netflix.

I just thought it would be nice if I could access my PC / Media center via my Laptop or phone.

I'm not aware that the WAN port might be NAT'ed already, I just plugged the 192 one in there and set it up so I can have my own firewall rules and DNS being dished out as the ISP doesn't want to change those (because apparently they don't want me to think their internet is crappy, even though I admitted I know exactly what impact these changes would have and won't blame them for speed issues, where there would be none since the DNS is local anyway)

So if the 192 one changes to the same range as the 172 one, and it's NAT'ed automagically, surely it would work?
Click to expand...

You are basically running a Router behind a Router.

Why do you want them in the same range?

No having the same IP range won't magically make it route to the other devices as there is a gateway in the middle.

I'm guessing you you want the Wireless devices to talk to the Ethernet devices.

Simply add an Access Point connected to your own Miktrotik, or install a wireless card inside it.
 
Leroy Brown said:
Ja something isn't right there. You should disable DHCP on your second router and use it in bridged mode if possible. The second router should also go to the LAN port on the first router then

http://www.linksys.com/us/support-article?articleNum=143751
Click to expand...

He wants to have his own DNS servers and static routes in place.

So this would be the more sensible way yes, but doesn't accomplish why he is doing this elaborate setup in the first place.
 
halfmoonforever said:
if he doesnt have access to the 172 at all, and he currently have 2 DHCP servers running, one on the 172 and one on the 192, so not sure how you're saying this is not possible?
Click to expand...

Well it's not possible to connect between the devices in this setup. OP basically has two separate networks
 
SauRoNZA said:
He wants to have his own DNS servers and static routes in place.

So this would be the more sensible way yes, but doesn't accomplish why he is doing this elaborate setup in the first place.
Click to expand...

This is true. Sauron probably has the best solution with the wireless AP
 
Thanks for the replies. I have struggled to figure out how to connect the wireless AP to the 192 mikrotik router and the ISP hasn't replied to my questions on how to do it either. It's a Ubiquity AP connected to their mikrotik, if I switch the cables out, I have a minute or two wireless access on the 192 range but then the AP starts flashing for some reason and loses all connection.

If anyone can point me in the direction of setting up the AP with the 192 one, then that would solve all the issues and the mikrotik (172) from the ISP would then purely be there to connect me to their internet.

Oh and this isn't a WISP but a fibre provider, sorry if I misled
 
Does the Ubiquiti AP belong to the ISP as well ? If not, install Unifi on a desktop and do a factory reset on the AP while it is connected to the 192 network - Unifi should pick it up and allow you to configure it any way you want.
If it does belong to the ISP, you may have to do as suggested above and get your own AP to support clients on the 192 network - then you can unplug the Ubiquiti AP and let all the devices connect to your AP.
 
envo said:
Thanks for the replies. I have struggled to figure out how to connect the wireless AP to the 192 mikrotik router and the ISP hasn't replied to my questions on how to do it either. It's a Ubiquity AP connected to their mikrotik, if I switch the cables out, I have a minute or two wireless access on the 192 range but then the AP starts flashing for some reason and loses all connection.

If anyone can point me in the direction of setting up the AP with the 192 one, then that would solve all the issues and the mikrotik (172) from the ISP would then purely be there to connect me to their internet.

Oh and this isn't a WISP but a fibre provider, sorry if I misled
Click to expand...

Fibre? But you don't have access to your own router? What is this ****?

Anyway. Reset the AP and configure it from new.

I'm guessing it's a Ubiquiti Air Router?

If so you can throw out the Mikrotik completely. And set it up as your Router device instead.
 
SauRoNZA said:
Fibre? But you don't have access to your own router? What is this ****?

Anyway. Reset the AP and configure it from new.

I'm guessing it's a Ubiquiti Air Router?

If so you can throw out the Mikrotik completely. And set it up as your Router device instead.
Click to expand...

Both AP and Mikrotik belongs to the ISP and I don't have access to it (they refuse, even if I ask them to setup the firewall/DNS servers like I need them)

That's why I got the 2nd Mikrotik, purely just so that the DNS server and Firewall can be tweaked to my preference (Netflix/Unotelly) for all devices on my network which is hard wired.

The only things that is not hard wired is my laptop and phone.

I don't think it's the Ubiquiti Air though, and even if it was, I can't use it as my only connection to everything since the ISP provided Mikrotik is the one doing the connection to the ISP and not the AP.

They say everything is "cloud managed" so I fear even if I reset the AP and configure it from scratch (and that it might not even work then) I'd screw everything up and then make people mad.

I don't own the equipment or the place I rent currently.

I have an old Linksys ADSL router that has wireless on it. I can possibly use that as an AP
 
Very ****ty "ISP" then.

Sounds like one of these fly by night cash cows.
 
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