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Questions tagged [subnet]

A subnetwork, or subnet, is a logically visible subdivision of an IP network. The practice of dividing a single network into two or more networks is called subnetting and the networks created are called subnetworks or subnets.

A subnetwork, or subnet, is a logically visible subdivision of an IP network. The practice of dividing a single network into two or more networks is called subnetting and the networks created are called subnetworks or subnets.

Subnetting provides a way to use the number of IPv4 addresses in an optimal way. The previous notation with classes caused a lot of IP's to remain. In the beginning this was not a problem, but these days IPv4 addresses have already depleted at the top level.

Source: wikipedia

Tutorial on subnetting

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Windows DNS: Is there a way to partition a domain based on subnets

In our organization, we have two separate groups which share network address space and a domain. A couple of slices of /24 are allocated to my group, while the rest is allocated to our internal IT team. We do not wish to be able to manage DNS for…
James Shewey
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How can I use a gateway on another subnet?

I'm trying my first attempts at routing and hitting the "Network is unreachable" message. My goal is to successfully ping frome one machine (subnet 10.56.34.0) to a machine on a completely different network (10.1.201.0) even though my 10.56.34.0…
Drew Mills
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Routing between two subnets using a Linux box with two NICs

I have a Linux box with two NICs, each connected to a different LAN: Network A: 192.168.1.0 255.255.255.0 Network B: 192.168.2.0 255.255.255.0 The routers are: 192.168.1.1 192.168.2.1 Linux NICs are: 192.168.1.2 192.168.2.2 I want all hosts in…
user4104
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Two routers on different subnets - will this configuration work?

I'm hoping a network guru can help me out here. I have a network installation project at a client site and I've mentally mapped out how I plan to set it up. They already have a Verizon router set up and it must stay configured as the first…
tinghino
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Why can't I have the same subnet on WAN and LAN?

I want to know why same IP with same mask on both WAN and LAN side could be a problem. I also want to know if setting different mask, but having same IPs will resolve the routing problem. Specifically are same IP addresses with different masks…
alpav
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Why does operating system need to know subnet mask?

If I understand correctly, the operating system gets subnet mask together with IP and other stuff from the DHCP server. And this subnet mask seems to be important for router because it knows if packet goes from/to LAN or should be sent somewhere…
scdmb
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why would you create two different subnets on the same physical network?

I'm working at a messy location, one of the strange (for me) things is that on the same physical network there are two different subnets. Specifically some computers will have 10.0.0.0/24 and some others will have 172.16.0.0/24. There is only one…
user175416
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How does broadcasting work on a server with multiple IPs?

Say you have two dhcp servers, A and B. Server A has two IP addresses, 10.0.0.1 and 10.0.0.2. Server B has one IP address, 10.0.0.3. Server A has two instances of isc-dhcp running, one specifying a local-address of 10.0.0.1 and the other specifying…
Mythics
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Using Microsoft DNS to respond based on requesting subnet

In our enterprise Windows Active Directory environment, we have some 50+ subnets scattered across a large geographical area. We have a system at each site that supports the site by providing a central drivers store, a central software store, SEP…
Kasius
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Routing between two routers with static routes

I have a Draytek 3200 router and a pfsense rackmount router that I am trying to get to route to each other. I have a subnet on each router and a subnet for the link between, as shown here: As it stands at the moment I can ping from the Draytek…
dannymcc
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Trouble with Netbios over two subnets, can this be resolved with a domain controller?

I'm working on upgrading the network at my office... Right now we have two subnets, one for our workstations (on a wireless network) and one for our servers (mapped to static IP addresses). We're having trouble with folder sharing, etc. due to…
Matt McCormick
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Sonicwall routing between multiple subnets on multiple interfaces

As shown by the network diagram below, I have two completely separate networks. One is being managed by a Sonicwall NSA 220, the other by some other router (the brand is not important). My goal is to allow devices within the 192.168.2.0/24 network…
Rain
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Is this IPv4 and subnet combination public or private?

Possible Duplicate: How does IPv4 Subnetting Work? I thought I understood this but I am momentarily confused. Here is an example: Are all IPv4 addresses from 192.168.0.0 to 192.168.255.255 in the private range, regardless of subnet mask / routing…
taz
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Share one IP address with a simple router

We have just moved into a new office and have been given our 'internet connection' in the following form: One Ethernet cable in the corner of the room An IP address with subnet mask 255.255.255.0 We have several computers, and are wanting to set…
soothsayer
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OpenVPN performance terrible to other machines on server's subnet

I'm using a "server" that is a hacked-up first generation Apple TV running Linux. I'm having a lot of trouble getting OpenVPN performance to be what I would expect with my new OpenVPN setup. The network looks like this: Home LAN 172.16.1.0/24 VPN…
Michael Gorbach
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