Internal IP Addresses Increase

[tomoki]

Hi,

 

Is it possible to increase the range of internal IPs for a router? The internal ip starts with 10.10.20.160 but I'm not so familiar with internal IPs starting with 10. 

 

I found this post http://serverfault.com/questions/88314/how-to-extend-ip-range-from-192-168-1-1-to-192-168-2-254 and I think it may relate but I don't have to be specifically looking at something like 10.10.21.254

 

I'm not sure how to set it up. Thanks!

[zMeul]

how many IPs you need?!

[tomoki]

6 minutes ago, zMeul said:

how many IPs you need?!

Well this is for a company warehouse and I'm just looking into increasing the internal IP range. There aren't enough. 

[Vitalius]

27 minutes ago, tomoki said:

Hi,

 

Is it possible to increase the range of internal IPs for a router? The internal ip starts with 10.10.20.160 but I'm not so familiar with internal IPs starting with 10. 

 

I found this post http://serverfault.com/questions/88314/how-to-extend-ip-range-from-192-168-1-1-to-192-168-2-254 and I think it may relate but I don't have to be specifically looking at something like 10.10.21.254

 

I'm not sure how to set it up. Thanks!

Yes, you want to change the subnet. 

255.255.255.0 gives you 253 IP addresses.

255.255.252.0 gives you 756 IP addresses.

You probably won't need more than that though. If you do, here's a table to give you an idea.



If you really never want to have an issue with this again, you can just do 255.255.0.0 and have 65,535 IP addresses.

You're gonna need to do this on the Router and if any devices have static IP addresses, you need to change the subnet mask on those individually.

[zMeul]

Just now, tomoki said:

Well this is for a company warehouse and I'm just looking into increasing the internal IP range. There aren't enough. 

you need to know how many, in what ballpark because you will need to modify the IP class and subnet mask 

[zMeul]

2 minutes ago, Vitalius said:

Yes, you want to change the subnet. 

255.255.255.0 gives you 253 IP addresses.

255.255.252.0 gives you 756 IP addresses.

You probably won't need more than that though. If you do, here's a table to give you an idea.



If you really never want to have an issue with this again, you can just do 255.255.0.0 and have 65,535 IP addresses.

yes, but he needs to know if the router actually supports that many hosts

also, if he has managed switches - those things can be very picky on what class and subnet they operate

[Guest]

10 hours ago, tomoki said:

Well this is for a company warehouse and I'm just looking into increasing the internal IP range. There aren't enough. 

What's the router? The issue that you've got is that your lease pool isn't big enough but this will stem from one of two causes. 

 

The first is that the pool start and stop addresses are too close together. Chances are your pool starts at 10.10.20.160 and ends at 10.10.20.254 - that gives you 94 leaseable addresses provided that the default gateway sits outside of the address (eg 10.10.20.1) - you'll need to look at allowing a lease from eg 10.10.20.10-10.10.20.254 giving you 244 leases. This can normally be found in the settings of the DHCP server. Note that this may affect any devices that are statically defined between 10.10.20.1 to 10.10.20.159 and not reserved in the DHCP server. What I mean is that an address that is statically assigned to a switch for example, may be leased a second time by the DHCP server automatically and cause issues. This can be resolved by making sure you reserve any IP that is statically assigned. Ideally everything is handedled by the DHCP on a dynamic basis where possible. 

 

If that doesn't work and give you enough addresses or you can't change the start value, you'll need to expand the subnet. Chances are you're a /24 (255.255.255.0) meaning the first 24 bits of the address are the same and the last 8 change (32 bits in an address) - for example 10.10.20.x  - what you would want to change to would be a /23 giving you more addresses. (10.10.2x.x)

 

If you have questions or need further help, ask away. 

Edited October 30, 2016 by Windspeed36

[tomoki]

20 hours ago, Vitalius said:

Yes, you want to change the subnet. 

255.255.255.0 gives you 253 IP addresses.

255.255.252.0 gives you 756 IP addresses.

You probably won't need more than that though. If you do, here's a table to give you an idea.



If you really never want to have an issue with this again, you can just do 255.255.0.0 and have 65,535 IP addresses.

You're gonna need to do this on the Router and if any devices have static IP addresses, you need to change the subnet mask on those individually.

 

Very informative chart! I think there will approximately be around 200 people max at this warehouse and this one network covers all of us. As for where the router is located and what it even looks like, I have no idea and will probably use something like inSSIDer to find it and also ask someone who would know where the routers are situated so I can fiddle with it. This network is purely for personal handheld devices like phones, tablets and so forth. 

20 hours ago, zMeul said:

you need to know how many, in what ballpark because you will need to modify the IP class and subnet mask 

Approximately 200 I think. Right now, it doesn't even take that many and sorry I don't know how many it can take but what I do know is it's basically first come first serve on who gets to get hooked onto the wireless network. That's pretty pathetic imo. I'm going to go look for the router in the near future... as soon as I'm done upgrading ALL of their work laptops. 

20 hours ago, zMeul said:

yes, but he needs to know if the router actually supports that many hosts

also, if he has managed switches - those things can be very picky on what class and subnet they operate

I am actually unsure about this as well. I found a server room that has a bunch of ethernet cables but obviously I don't know any better as to what that thing does. I'm thinking that's a massive switch box? Probably don't want to fiddle with it if it's that size but if it's a regular router, I can deal with it I think. The massive switch box I think is for our work computers. We have 3 networks. 1 is for work laptops solely. Another is for personal devices like phones, tablets etc. The last one is purely for barcode scanners. I think it's a nice way to set it up. I just wish I knew more about server rooms and server rack related stuff. I don't really have any experience with that stuff... neither do I have the chance to experience that kind of stuff at home. 

10 hours ago, Windspeed36 said:

What's the router? The issue that you've got is that your lease pool isn't big enough but this will stem from one of two causes. 

 

The first is that the pool start and stop addresses are too close together. Chances are your pool starts at 10.10.20.160 and ends at 10.10.20.254 - that gives you 94 leaseable addresses provided that the default gateway sits outside of the address (eg 10.10.20.1) - you'll need to look at allowing a lease from eg 10.10.20.10-10.10.20.254 giving you 244 leases. This can normally be found in the settings of the DHCP server. Note that this may affect any devices that are statically defined between 10.10.20.1 to 10.10.20.159 and not reserved in the DHCP server. What I mean is that an address that is statically assigned to a switch for example, may be leased a second time by the DHCP server automatically and cause issues. This can be resolved by making sure you reserve any IP that is statically assigned. Ideally everything is handedled by the DHCP on a dynamic basis where possible. 

 

If that doesn't work and give you enough addresses or you can't change the start value, you'll need to expand the subnet. Chances are you're a /24 (255.255.255.0) meaning the first 24 bits of the address are the same and the last 8 change (32 bits in an address) - for example 10.10.20.x  - what you would want to change to would be a /23 giving you more addresses. (10.10.2x.x)

 

If you have questions or need further help, ask away. 

Awesome reply! I think it's the first issue you've described... given that we don't even have enough internal IP addresses. I don't think phones can have static IPs...not that I know of how to do it nor does anyone else here know because I'm pretty much the only guy working on upgrades and knows enough about hardware to upgrade their laptops and software to tweak it. I don't know much about networking so sorry about that if I sound like a complete idiot. The only thing is, the warehouse is fairly large in size and the network that spans throughout the warehouse for personal devices must mean there are probably more than 1 router. 

 

I think this may be an easy issue to resolve only if I knew how to connect to the stupid router ...given the password and such... Please correct me if I'm wrong anywhere with this reply because I simply don't know better hahaha ~ I think I'll go read more upon this stuff. 

[zMeul]

9 minutes ago, tomoki said:

Approximately 200 I think.

you have under 253 hosts (IPs) + router you can manage it under a single range without modifying the subnet

you just need to widen the DHCP's address pool and bind the MACs to those IPs that absolutely need to stay on the same IP - done from the same DHCP server

 

don't need to physically find the router, just it's IP; go to a connected PC and look at the assigned gateway - that's the router's IP

[tomoki]

1 minute ago, zMeul said:

you have under 253 hosts (IP) + router you can manage it under a single range without modifying the subnet

you just need to widen the DHCP's address pool and bind the MACs to those IPs that absolutely need to stay on the same IP - done from the same DHCP server

 

don't need to physically find the router, just it's IP; go to a connected PC and look at the assigned gateway - that's the router's IP

Ah. The issue is that our PCs cannot be connected to the router. That might be a big issue. Perhaps I'll need to bring my own laptop to connect to that network so I don't get blacklisted.