How Computers On Separate Subnets Communicate With One Another

Mar 13, 2011

I have two groups of students I wish to seperate by subnetting. Students are nine in each group, and there's one Cisco router (or W-server set as a router). After giving group A an IP of 192.168.200.1, and group B an IP of 192.168.200.129 and connecting each interface to it's own seperate switch, what else does each PC user need to do to establish communication with members not in his/her own subgroup?

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Routers / Switches :: Separate Subnets Not Working As Described

Jun 25, 2011

I'm trying to set up 2 separate networks in my home, both of which have access to the internet through a single ISP.I have set up my networks using 2 routers as described in the "Version 2" scenario found here: url...The problem is, a computer connected to the LAN side of Router 2 is able to ping and map shared folders on computers connected to the LAN side of Router 1. According to the writeup (last paragraph), this should not be the case.I have been over the setup multiple times to ensure it is per the writeup but each time, I am able to ping and map.Is there some additional router/computer settings that I may be missing?FWIW, here's my take on what is happening (with the ping): When a computer on the LAN side of Router 2 (submet 192.168.1.x) does a ping to a computer on the LAN side of Router 1 (subnet 192.168.0.x), Router 2 sends the request to its Default Gateway (since it's a different subnet).Router 1 however, recognizes this as its LAN side subnet and forwards the request to that computer. The ping response is then routed back from Router 1 to Router 2.

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Why Should Wireless And Wired Networks Be On Separate Subnets

Oct 24, 2011

With traditional classful subnetting, the same number of host bits is used to designate the subnet ID for all the resulting subnetworks. This type of subnetting always results in a fixed number of subnets and a fixed number of hosts per subnet. For this reason, this is known as fixed-length subnetting. The decision about how many host bits to use for the subnet ID is a big planning decision. There are two considerations when planning subnets: the number of hosts on each network, and the number of individual local networks needed. The table for the subnet possibilities for the 192.168.1.0 network shows how the selection of a number of bits for the subnet ID affects both the number of possible subnets and the number of hosts that can be in each subnet. One thing to keep in mind is that in all IPv4 networks, two host addresses are reserved: the all-0s and the all-1s. An address with all 0s in the host portion of the address is an invalid host address and usually refers to the entire network or subnetwork. An address with all 1s in the host portion is used as the local network broadcast address. When a network is subnetted, each subnet contains an all-0s and an all-1s host address that cannot be used for individual host addresses.

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Setup 2 Computers To Communicate With Each Other?

Sep 30, 2011

How do I set up to computers to contaminate with each other in the same room

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How To Get WLAN Computers To Communicate With Equipment On LAN

Dec 19, 2012

On a small office setup we have many computers connected to one another using wireless LAN. One of the PCs on the WLAN also has a LAN connection with a few other equipment connected to it. The WLAN IP Addresses are 192. 168. 1.XXX and the LAN addresses are 192.168.0.XXX. How can I get to communicate the WLAN computers with the equipment on LAN.

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WGR614 Keep Computers Separate On Same Network

Oct 25, 2011

I have about a Netgear WGR614 router and a few CentreCom FS708 switches.Is there a way to create a home network so every safe an secure computer can access the internet and another network where I would fix machines that have virus's or machines that I don't want to access the home network.

How would I go about doing this? Or do I need a better router with DD-WRT installed on it?

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Routers / Switches :: Why Can't Ping Computers On Separates Subnets

May 21, 2012

My new employer has asked me to determine any issues that could be causing performance issues our LAN. The network has two subnets and one of the first things that I noticed is that I cannot ping computers on subnet A from subnet B. I've looked into this and found a few things.-I CANNOT traceroute to computers on subnet B from subnet A-I CAN NMAP to computers on subnet B from subnet A-Computers on subnet A CAN ping other computers on subnet A and computers on subnet B CAN ping other computers on subnet B-Computers on subnet A CAN ping and access servers on subnet BI am relatively new to networking and not exactly sure where to start investigating this problem.

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Cisco Firewall :: ASA 8.4 / NAT Some Subnets To One IP And Other Subnets To Another IP?

Aug 15, 2012

I need to NAT some subnets to one IP and other subnets to another IP. The range command want work because some of the subnets are out of order.For example  subnets 192.168.1.0 - 192.168.7.0 and 192.168.25.0, 192.168.28.0 nat'd to 1.1.1.1.  subnet 192.168.26.0-192.168.27.0 nat'd to 1.1.1.2

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Separate Port 4 Into Separate Vlan?

Jan 16, 2013

My fiance recently signed up for the Screen-wise Panel for Google research. Basically they monitor your TV usage and your internet usage. As part of the program they installed a Cisco WIFI router. I've got no issue with them logging the sites visited etc but I'm a little worried about them possible collecting private information (banking / work related stuff) that I don't want going out there. According to what I've read what's supposed to happen is they replace your router with the new Cisco router.The "technician" who came in and installed the router was actually a builder and not an IT technician and rather than replace our router he connected the Cisco router into port 4 of our router... I wasn't in at the time.

What I was looking to do is separate Port 4 of my router into a separate VLAN that can access the internet, but not access anything on ports 1-3, or the wireless. However, I want to be able to see everything on port 4 from the other side (in other words I want to see "into" the port 4 VLAN, but don't want them to see out). I also wanted DHCP to assign IP addresses correctly depending on where you were plugged in. In this example the first VLAN (your current router ip address) is going to be on 192.168.1.1, and the second VLAN (the new on we create on port 4) is going to be on 192.168.2.1.This is exactly what I'm looking to do, I could then connect the kids machines / tablets / ipods to the Cisco router and have the main machine and my work laptop on the main router... but I don't have a clue how to do it. </quote> Is this something that I am able to do with the Netgear router I own and is it hard to set up?

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Connection Between Two Subnets

Apr 12, 2012

I have a home network. There are a total of 3 PCs. Each runs Server 2008 32 bit. One PC - Lets say Server A has 2 NICs with Ip addresses, 10.0.0.10/30, 10.0.0.2/30. Other two computers Server B and Server C have single NIC with addresses 10.0.0.1/30 and 10.0.0.9/30 resp. So as you can see that there are two subnets 10.0.0.2 - 1 and 10.0.0.9 - 10. I can ping B and C from A. I want that B and C can also ping each other and if I run tracert on B or C, it should give me the route to the destination via A. All this without any other hardware. Like using route add... etc eg. if I write tracert 10.0.0.9 on B, it should return a route like 10.0.0.1-----10.0.0.10------10.0.0.9.

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Two Subnets Across Same Link

Aug 24, 2012

I have two subnets, that need to share a common link, and each with its gateway at the opposite end. What kind of switch do I need for the two red boxes?

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Same MAC Addresses In Different Subnets?

Nov 20, 2012

I have an exercise with picture you find below. The question is: Will the network shown in the diagram work correctly when you consider that the MAC-addresses PC0 and PC8 are the same, and why?

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How To Connect Two Subnets

Mar 26, 2013

I have 2 DSL Lines going into a load balancing router. The load balancer is set up to distribute the traffic equally on the two lines, hence doubling the bandwidth. Though great at load balancing, it cannot handle DHCP for the 50+ users on our network, and therefore we are using another router for DHCP, which is running DD-WRT firmware.DSL 1 - 10.1.0.1DSL 2 - 10.2.0.1Load Balancer - external 10.1.0.2, 10.2.0.2 internal 192.168.10.1. DHCP Router - external 192.168.10.2, internal 192.168.1.1All other devices - 192.168.1.xThe load balancer has many options to direct traffic to one WAN port or the other based on IP address, which we would like to implement. But right now, since all my devices are on the 192.168.1.x subnet, it can't see anything but the DHCP router. So essentially it thinks it has only one client.

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Split Network Into 3 Subnets?

Oct 9, 2012

I need to split a network: 10.0.4.0/24 into 3 subnets with the following hosts per subnet:

Subnet 1: 80 hosts
Subnet 2: 10 hosts
Subnet 3: 120 hosts

split into 3 subnets?

Im thinking something like this:

Subnet 1
Network 10.0.4.0
Subnet Mask 255.255.255.128

[Code].....

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How To Find Out Range Of Subnets For Given IP

Jul 7, 2011

if some gave me an IP address and subnet mask, and they told me to identify the range of valid subnets I have no clue how to do it. I know how to work out the total number of subnets and hosts, you just look at how many subnet bits have been borrowed and use the 2^ formula. For example with the IP 172.28.123.0/25 I know the default mask for a classs B address is 255.255.0.0/16 so in this example we have borrowed 9 subnet bits to give mask of 255.255.255.128/25 and 7 host bits remain. In order to find the total number of subnets you do, 2 to the power of 9 because we borrowed 9 bits, which tells us that there's 512 subnets and to find out how many hosts we do, 2 to the power of 7 because we have 7 host bits, so that gives us 128 hosts in each subnet. Now this is where I get lost, how do I find out the number of the first and last subnet? I know there's 512 subnets and each subnet has 128 hosts. But I don't know the number of each subnet, the range to be more precise. How do I workout the first, second, third, fourth etc subnet address

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Connecting Two Subnets At Layer 2

Jul 2, 2012

I have :

- two different subnets (S1, S2)

- these subnets are connected to an IP backbone via wirelles acces points

I would like to physically connect these subnets together so the networks devices in S1 could directly communicate with the devices in S2 and vice versa without going through the backbone.

The obvious solution seems to interconnect these subnets with a router or a switch L3. But I would like to connect these subnets and stay at layer 2.

So, is it possible to connect S1 and S2 with a switch L2 ? If I do that, what is going to happen? Can I create just one subnet S3 from this two subnets when I connect them together and have my two separate subnets back as soon as I disconnect them?

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Folder Sharing Between 2 Subnets?

May 11, 2012

our office has 2 branches recently the static ip of the branch was changed to a different subnet. earlier it used to be

111.170.150.140 subnet mask (255.255.255.128) main branch router (1) ip which forwards all request to server (dmz) - unchanged

111.170.150.141 subnet mask 255.255.255.128 sub branch (2) router ip changed to 111.170.150.61 subnet mask 255.255.255.224

after this change i am not able to access shared folders on the dmz server (1) (111.170.150.140). i am able to ping the ip and also able to open remote desktop connections from sub branch (2).i suspect that it is because of subnet change as i was earlier able to access shared folders?How can we access the shared folders across the subnet? what settings to change?

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Making 4 Subnets For VLANs?

Dec 4, 2012

You have to make 4 subnets for 4 VLANs, the router interface assigned to each VLAN is the LAST usable host on the subnet.so unless I'm really bad at networking the graph should be:

NET ID // HOSTS // BROADCAST ADDRESS // VLAN

192.168.0.0 // 192.168.0.1 - 192.168.0.62 // 192.168.0.63 // VLAN1
192.168.0.64 // 192.168.0.65 - 192.168.0.126 // 192.168.0.127 // VLAN2
192.168.0.128 // 192.168.0.129 - 192.168.0.190 // 192.168.0.191 // VLAN3
192.168.0.192 // 192.168.0.193 - 192.168.0.254 // 192.168.0.255 // VLAN4

So if I'd have to write down a single host configuration for VLAN2..I think it should be:

IP: 192.168.0.65
subnet mask: 255.255.255.192
default gateway: 192.168.0.126

Is this correct? I'm not sure whether the default gateway should be 192.168.0.255 (as would with normal subnets) or as I wrote down 192.168.0.126, this is the first time i've ever gotten assignments including VLANs and I havn't really gotten a solid explanation.

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Cisco :: PC0 Cannot Communicate With Other Two PCs

Sep 21, 2012

I am preparing for CCNA exam and for that I have been working with OSPF in packet tracer.In the scenario below I have made configuration with three routers and everything seems to be working well. However, following ping commands cannot be reached.PC0 cannot communicate with other two PCs. Others can.(can ping from PC1 to PC0 and PC2. Can ping from PC2 to PC0 and PC1 BUT CANNOT PING FROM PC0 TO PC1 and PC2) [code]

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Unable To Communicate With DNS?

Dec 1, 2011

My friend and I bought Acer Aspire 5741's about 9 months ago and neither of us has had any problems until now. My friend went to connect to the internet via wireless router yesterday to find that there was limited connectivity (no internet access). We assumed it was a router issue and I gave her a number of things to check but all seemed ok with it. I went to her house to look at it today and when I ran the connection troubleshooter got "windows can't communicate with.......... (DNS server)". I connected my laptop via her router and everything was fine. I brought her laptop back to my house and tried to connect to the internet via my router and got exactly the same 'DNS' message - my laptop again connected without any problem.

I have re-booted the routers, laptops, network adapters etc and also checked the wireless adapter settings on both laptops, which appear to be the same. I have re-set the TCP/IP stack and have also tried ipconfig /release and /renew - none of which seems to have made any difference. the results of the tests are as follows (linksys is the SSID in use):

Windows IP Configuration
Host Name . . . . . . . . . . . . : Debbie-PC
Primary Dns Suffix . . . . . . . :

[Code].....

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Cannot Communicate With DNS Server

Jan 12, 2011

I've been having a problem with my browser lately, Its really slow and it turns out I have 1000 ping average ...the ping does up and down some times its 1 or 2 sometimes 500 . any way I get this msg when I use the diagnose option " Cannot communicate with DNS server(196.40.3.9) .

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How Two Routers Communicate To Each Other

Nov 15, 2012

RIP works on which layer and how it works.how two routers communicate to each other.

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Cannot Communicate With DSN Server

Jul 16, 2012

Haven't been able to connect to the internet for the whole day,This is what I get when I run ipconfig in the cmd, tried doing the two resets but it won't work!

Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:UsersFelicia>ipconfig/all
Windows IP Configuration
Host Name . . . . . . . . . . . . : Michelle-PC

[code]....

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How To Get Dir 615 To Communicate Wirelessly To Dir 655

Nov 7, 2012

I need to get a dir 615 router in one room to comunicate wirelessly to a dir 655 in another room that is connected to my internet modem. I can't connect them with an ethernet cable. I need the extra ports on the dir 615 because the signal strength from the 655 is too weak

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Cisco :: Designing A Network Using Subnets?

May 5, 2011

I recently added a post lately referring to drawing a topology of a large network with a high number of hosts. Now with project itself, I'm designing a network for a large organisation with a different number of hosts at each location.These are, 500,18,52,236 and 12. The location with 500 hosts is the head office, to which every other branch has a wide area network connection through a serial link.How many subnets would I require? I wrote down subnet details, but only for 5 subnets, a subnet for each location. Is that all I need? Or do the WAN connections count as subnets

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2 Subnets + Both Legs Of Router On Same L3 Switch?

Sep 6, 2011

This might be ridiculously bad for security but I'll ask anyway. Is it ok to have two routers on the same subnet? One router/firewall will do NAT for hosts that don't need a real IP/or care to manage their own firewall and the outward facing router.

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Cisco :: Communication Between Subnets On 5510

Sep 13, 2011

I am working on a Cisco 5510 with multiple interfaces and requirements. I have experience with Cisco IOS, but not too much with the ASAs. I seem to be getting a bit confused on the NATing and ACLs on a firewall that was started by another employee, who is no longer here. With my current config I can get the firewall in place (we are currently using an older PIX) and most basic functions work except for two key things: 1) communication from the finance interface to the inside interface. The finance subnet has some restrictions that you will see in the ACL- we are trying to limit connections to the those systems, but they need to be able access an e-mail server on the inside. 2) communication from the DMZ interface to the inside interface. Maybe related to the first problem?

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Cisco :: Multiple Public Subnets On Asa

Mar 2, 2012

I've currently got my ASA (5505) serving a /28 public subnet. I've ran out of IPs, so my DC has issued me an additional /24 subnet that they have routed to my ASA. What needs to be done on my ASA so be able to use these new addresses? I've been trying to search and not been able to find a good answer (some say I shouldn't have to do anything, everything else references NATing, which I currently don't do and would rather not do).The servers I assign these to, I'd like them to have the public ip assigned directly to them.

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Cisco :: VPN Can't Access Subnets Behind 2nd Router

Mar 11, 2012

I purchased an ASA 5505 and placed it between my Cable Modem and Cisco 3745 router. The outside interface on the ASA is dhcp, the inside interface is 192.168.100.1. The outside interface of the 3745 is 192.168.100.2 and the inside is 192.168.1.1. The VPN pool is 192.168.200.10 - 192.168.200.10.

1. When I establish a VPN session to the ASA, I can ping and access any resources dierectly connected to the ASA's interfaces and on the ASA's internal 192.168.100.0 network. However, I cannot access any resources behind the 3745. I cannot even ping 192.168.1.1. Even directly connected hosts on the ASA cannot access Hosts in the 192.168.1.x subnet. There appears to be no traffic between 192.168.100.0 and 192.168.1.0.

2. Although I believe that I sent up split-tunnel, I cannot U-Turn back to the internet once connected to the VPN.

Here is my network topology as well as my ASA config and Router config.....

ASA ......
ASA Version 8.2(5)
!
hostname poog-fw1
domain-name poog

[code]....

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Multiple Networks Different Subnets Windows 7?

Jan 24, 2013

I have a Windows 7 Pro Desktop with an on-board Ethernet and an Axis USB To Ethernet adapter. The on board Ethernet is configured as dhcp and obtain the address 10.162.146.123 with 255.255.255.0 subnet. The Axis USB to Ethernet adapter is static ip configuration with 10.38.25.37 and 255.0.0.0 as subnet. Under the adv settings I have also another ip 11.38.25.37 with 255.0.0.0 subnet. When the Axis is communicating 10.38.0.1 network I can not access the internet using the on board Ethernet 10.162.146.123. I have to disable either one of the cards to access one network at a time.

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Cisco :: Connecting 3 Subnets On 1 Switch?

Mar 31, 2012

I have 1 Cisco switch 24 ports and 12 computers. The 12 computers are divided in three groups and every group is a different network segment.

question 1: I need that every group has communication with its own set of computers but no communication with the computers on the other segments.If I connect the computers to any port on the switch, can they communicate within its own groups? Can the switch pass the network traffic for all of them?

question 2; What I need to do on the switch to have them to reach the internet?

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Connect Host To Switch In Different Subnets?

Jul 28, 2012

How is it possible to connect a host to a switch when they're in different subnets? I'm new to Networking and was thinking it may be achievable through VLAN configuration?

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Cisco LAN :: Connecting 2 Subnets Using 2921?

Feb 12, 2013

I have a cisco 2921. I have 2 networks that has its own router
 
192.168.1.0 network is connected to watchguard firewall 192.168.9.0 network is connected to the cisco 2921 router.
 
I want to connect the 2 subnet using one of the interface of the cisco router. How I can get this work? It is not connected via vpn tunnel but we want to have LAN speed when accessing resources on both network. Each network is connected to a dell switch.

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