0
votes
2answers
84 views

Questions regarding my network plan

I'm developing an IT infrastructure room for testing purposes. The overall aim is to create a network, which if fully disconnected from the productive environment and several people can come and ...
2
votes
1answer
99 views

Inter-VLAN routing: multiple VLANs, only one should be accessible to all. Makes sense?

I am trying to segment our company's network. My main goal is to have many small broadcast domains instead of a gigantic one, so I thought of assigning one VLAN per department. However, we have many ...
0
votes
1answer
120 views

How to get 192.168.3.2 to successfully ping 192.168.2.3

With the layout described below, the following is true: either router can ping any host on either subnet 192.168.2.0/25 hosts can ping (and ssh to) 192.168.3.0/24 hosts but 192.168.3.0/24 hosts ...
1
vote
1answer
46 views

Is it possible to send different-per-subnet DNSes from the single ISC DHCP server?

The case I want to cover is to send different DNS server for one, isolated VLAN, which purpose is to give internet-only access - for our guests. It has no access to our internal network, so it ...
1
vote
1answer
65 views

Name resolving issue

I have a problem with my VoIP server name not resolving by voip.companyname.com If I try to ping it from windows 7/w2k8 the request is not coming back unless I type FQDN which would by ...
2
votes
1answer
219 views

Multiple VLANs in the same subnet

Is it possible to have multiple VLANs in the same subnet, with the same gateway address (TMG)? I want to avoid having many Subnets (and vNIC's in TMG) just to isolate sets of a few hosts. IP: ...
0
votes
1answer
73 views

Best option for having ethernet (level2) switch simulated on typical ethernet level3 switch/router?

I have two Linux servers which are going to be connected to typical l3 switch/router. They will both have assigned one public IP number per each ( let's say: pub.ip.n.1 and pub.ip.n.2) by IT. Q1: ...
1
vote
1answer
145 views

Configuring a firewall appliance with 2 VLANs - how are the outbound links on the firewall configured?

We just ordered a sonicwall NSA 4500 firewall and I am preparing a network diagram for its arrival. We have 12 servers in a newly setup rack, a 48-port switch, and a Sonicwall NSA 4500 firewall I ...
6
votes
4answers
667 views

Best Approach for subnetting/VLANing traffic?

Our network is currently setup with no subnets or VLANs. We are looking at going to VoIP so this needs to change before VoIP is installed. I believe that we want to use VLANs to separate Voice and ...
2
votes
1answer
1k views

DHCP for Multiple Subnets

So this is the current setup - essentially I would like to get my DHCP server, serving DHCP requests for two seperate subnets. Netgear DG834G acting as a modem connected to a Sonicwall Pro 2040. X0 ...
2
votes
1answer
526 views

Routing between subnets on different vlans connected by a router/firewall

I have two networks that I'd like to connect with a router/firewall to filter traffic between the two. One network is on a public subnet, let's say 64.22.12.192/27 and the other network is on a ...
1
vote
1answer
495 views

dhcp same subnet different vlans

I want to setup my work's network so that all wireless clients get assigned a certain IP range but are on the same subnet as the other network devices. Currently I'm running dnsmasq for DHCP and DNS ...
5
votes
1answer
188 views

In what scenarios would a VLAN not align 1:1 with a subnet?

Under what scenarios would a VLAN not align with a subnet. I've been told that genearlly they always go 1 to 1. What are some examples or scenarios, and reasons for anything besides that, and for what ...
-1
votes
1answer
227 views

VLSM network subnetting and expanding of ip range

I have a subnet/vlan which is almost full I want to expand it basically my layout currently is below: VLAN ID Useable IP Range Network Mask 10 192.168.1.1 to 192.168.1.14 ...
1
vote
3answers
1k views

multiple subnets on the same cisco switch port

We have several servers on colocation and now trying to re-organize the network by utilizing Cisco ASA 5505 as a router and Cisco 3750x series switch. Network topology is looking like that: ...
2
votes
2answers
635 views

One big subnet with all clients an issue?

Disclaimer: Network rookie, might have wrong assumptions. Got a basic subnet question that im interested in hearing your thoughts about. Subnet: 192.168.251.0/24 Address Range for servers: ...
0
votes
1answer
163 views

VTP Domain on 2 Subnets

Let's say you have 2 different subnets (10.100.0.0/22 and 10.100.8.0/22) in one subnet. You've set up your own VTP domain. If I want to add the 2nd subnet in that same VTP domain, would there be any ...
2
votes
4answers
1k views

Best way of isolating VM's to protect network?

On our network (1.0/24) we have a number of servers. One of those servers is running VMware ESX with three virtual machines which are hosting various websites and applications to the outside world. ...
1
vote
2answers
411 views

Is subnetting worthwhile\possible to seperate out VOIP in my situation?

I'm ballparking the numbers here, but I have 50+ machines and around 30 hard VoIP devices. Unfortunately, 10 or so PCs use the 100Mb pass-through port from the VoIP phones and 2 PCs use softphones ...
4
votes
3answers
620 views

Best way to break up a large subnet

I have ran into a 10.10.50.0/20 network that is having issues with packets dropping. They run all unmanaged switches and I imagine the huge amount of devices on one subnet is causing issues. I've ...
10
votes
2answers
13k views

Multiple VLANs, multiple subnets, single DHCP server?

At my job we are prepping to transition from multiple LANs connected over slow VPN connections to a single MAN connected over fiber, and I've got a few questions. First of all, we are planning on ...
1
vote
3answers
741 views

Making hosts accessible between LAN subnets

I have two inerfaces on my router with tomato firmwre: br0 and vlan4. br0 is on 192.168.0.0/16 subnet and vlan4 on 10.0.1.0/24 subnet. As I don't want the different network services on br0 available ...
1
vote
1answer
334 views

ESX vSwitches and natting multiple identical private subnets to the outside

Is it possible to use vSwitches on ESX 4 to allow multiple identical private subnets to be natted out to an external subnet? I'm used to the logic of natting a single private subnet out to a ...
1
vote
3answers
7k views

How can I create a VLAN on my extreme switch for a separate subnet/domain?

I'm putting together a small active directory implementation for a buddy of mine. I currently have 2 servers (one is the primary domain controller) and a couple clients. I need to test and run ...
2
votes
1answer
4k views

Configuring a DHCP server to serve multiple subnets on the same VLAN

I have a VLAN composed of multiple subnets, and I would like to use DHCP to centralize IP address designation. The DHCP server (100.100.25.88) is a Debian machine on the subnet 100.100.25.64/27. I ...
1
vote
5answers
3k views

How do I separate my network into different subnets?

I appolgize in advance for any elementry questions, as it has been a LONG time since college and I had hoped to never subnet again... :) I want to subnet a 192.168.1.x with 8 segments. Each will not ...
1
vote
5answers
986 views

Bypassing VLAN with known MAC address

I am evaluating subneting our network with a Layer 2 switch and VLAN. From what I know, VLAN only works on broadcast domain, and if I know the MAC address of a remote computer on the same switch, I ...
2
votes
3answers
2k views

How do I segregate two VLANs from each other while allowing both to communicate with a third VLAN?

Preface: I'm not a network or systems administrator. I have a little bit of networking experience, but it's limited to basic router configuration like port forwarding, setting alternate DNS servers, ...
0
votes
2answers
1k views

1 Router 2 LANs?

I'm not super keen on the fancy networking terminology to describe my situation, so please help me out with that as I describe my problem in the best terms I can. Currently, we have a network living ...
1
vote
3answers
2k views

Can I get a complete list of computers of a workgroup across subnets?

My network is composed of about 300 vlans (no broadcast between them). In each of those subnet are windows computers (xp, vista, seven). They are all included in the same workgroup (i.e. they aren't ...
9
votes
4answers
19k views

Best way to segment traffic, Vlan or subnet

We have a medium sized network of around 200 nodes and are currently in the process of replacing old daisy chained switches with stack-able or chassis style switches. Right now our network is broken ...