-2
votes
1answer
98 views

Is there a way to emulate a DHCP server (overlay network) [closed]

I have created an overlay Level 2 network using VLAN tags with Open vSwitch. I want a Level 3 one so I need to give each VM a consistent IP address. I'd like every host on this VLAN to get an IP ...
1
vote
1answer
273 views

Cross-VLAN sharing and auto-discovery of selective resources

I have a network with several VLANs that each contain resources or clients with different access rights. For simplicity, let's say I have 3 VLANs: ID 10: Contains privileged clients and private ...
0
votes
1answer
97 views

Multiple DHCP servers on a single physical network?

Today i got put on a project to solve a networking project for a friend who rents out multiple office suites. Internet is provided to all suites in the rent cost. The guy who originally set everything ...
0
votes
1answer
45 views

Changing from router DHCP to Server DHCP [closed]

I want to setup a Linux DHCP server instead of a router based DHCP. I'm guessing that I will need to turn off the router DHCP, but keep the router as the gateway. I think that the BCAST DHCP requests ...
1
vote
1answer
119 views

What determines which of a DHCP Relay Agent's IP addresses are attached to relayed requests?

I have a vlan with multiple IPs set, and a helper-address: vlan 15 ip helper-address 172.17.1.11 ip address 172.17.5.254 255.255.255.0 ip address 172.17.51.254 255.255.254.0 All relayed requests ...
3
votes
1answer
4k views

VLAN tags not shown in packet capture (Linux) via tcpdump

I am adding a tagged VLAN onto eth0: #ip link add link eth0 name eth0.20 type vlan id 20 This results in: #ip link 2: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc ...
0
votes
1answer
567 views

DHCP server with multiple scopes is issuing the wrong IPs to VLANs

We're restructuring our network, and configured our router/dhcp server as follows: # public internet connection auto eth0 iface eth0 inet static address 192.168.10.10 netmask 255.255.0.0 ...
0
votes
2answers
407 views

Separate WebBlocker settings, using one Watchguard XTM 505?

I support a school with 3 locations that uses a Watchguard XTM 505. They are implementing a BYOD wireless solution with Aerohive APs, and they will have 3 SSIDs (School, Guest, BYOD). Each SSID needs ...
0
votes
1answer
446 views

VLAN & WiFi & DHCP with Cisco SG200

I'm trying to configure a small business network with one Cisco SG200-26, a Linux server and two TP-Link TL-WA801ND. I have set up the APs to have two different SSIDs, Public and Staff, and have ...
0
votes
1answer
121 views

Assigning reserved DHCP addresses from multiple subnets/scopes to VMs on a single ESXi host

I assume this is possible by connecting one of the NICs to a VLAN from each subnet, or perhaps the helper IP takes care of this organically, but my question is, with one single ESXi host, and 3 VMs on ...
0
votes
1answer
224 views

Debian Network boot with a VLAN (DHCP + TFTP)

I've been given 34 servers (HP Proliant) to use for HPC. Due to the server owners' request, 33 of these will need to act as diskless thick clients, and one will act as DHCP and TFTP server to enable ...
1
vote
2answers
1k views

2 DHCP servers, VLANs, Mitel 3300, Sonicwall TX 215 conflict

Inherited a system that has likely not been properly maintained for about 10 years. Add to this that the firewall had to be replaced because the original one was not accessible because the former ...
0
votes
2answers
629 views

Switch sending DHCP packets to wrong VLAN

I have a basic remote site with a Cisco Catalyst 2924XL switch. There are 2 VLAN's at the site: 1 Default 2 Wireless There is a single server connected via a single ethernet cable, VLAN 1 is ...
0
votes
1answer
93 views

Changing DHCP Scope brought down the Internet connection

My school DHCP server(Win2008) runs out of IPs so I expanded the scope: original: 10.20.1.0 to 10.20.2.255 new: 10.20.1.0 to 10.20.3.255 But as soon as I finished it, all my workstations could not ...
2
votes
1answer
2k 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
312 views

Setting up a KVM virtual network with DHCP on host

I'm doing a voluntary network workshop on basic networking in a Linux environment. The idea is to show them how networking works, and give possible solution for migrations to Open source solutions ...
-3
votes
1answer
407 views

DHCP server for different VLANs [duplicate]

Possible Duplicate: How do I dynamically obtain IP addresses for VLAN interfaces? I am setting up a dhcp server to supply ip address for different VLANs of different subnet.(192.168.1.x for ...
2
votes
3answers
6k views

DHCP server for multilple VLANs [duplicate]

Possible Duplicate: Can I have multiple DHCP servers on one network? This is a very old question i guess.In this forum itself it has been answered in Multiple VLANs, multiple subnets, ...
3
votes
2answers
3k views

How do I dynamically obtain IP addresses for VLAN interfaces?

I have an Ubuntu machine on which I have created four VLANs, namely eth0.100 ,eth0.200 , eth0.300 and eth0.400. I want to dynamically obtain the IP addresses using the DHCP server. It should provide ...
1
vote
1answer
532 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 ...
0
votes
2answers
2k views

Windows DHCP server with multiple scopes - which will be used

I have a Win 2k3 server with DHCP running on a subnet with no VLAN, and 5 scopes (each with a different subnet). I have 4 VLAN's and a router that does DHCP relay to that server from each vlan. I ...
0
votes
1answer
100 views

How to place KVM VMs on several hosts in the same network, with one of the VMs as the DHCP server

I have a KVM host running on Centos. I have 3 Virtual machines installed on this host. Host is connected to a Nexus (Cisco). Virtual machine is able to get Internet. Everything is working fine. Now I ...
1
vote
0answers
189 views

Can multiple VLANs be provided with multicast addresses by a single MADCAP server?

Can a single DHCP server provide dynamic multicast addresses for hosts in many VLANs using MADCAP, just like it can provide hosts with unicast addresses via ip-helper? Or from a Cisco perspective, ...
2
votes
2answers
432 views

Overlapping DHCP scopes for different VLANs?

Should the following scenario work? I have a DHCP server on VLAN 101, with the IP 192.168.0.5. I have two other VLANs 102 and 103 where I want to hand out IPs the same range 10.20.30.40-240, but from ...
3
votes
3answers
1k views

Stop DHCP client from receiving old IP address on new VLAN

I have one DHCP server running Windows Server 2008 R2. It is configured with one Superscope which contains 5 member scopes. One scope for each one of my subnets. Here is the problem, if I am on VLAN ...
2
votes
1answer
395 views

Managed switch port-based DHCP allocation - general case?

I saw a strange comment bagging IT departments (i.e. sysadmins) on Slashdot the other day: half the time they cant even do a simple thing like provide a jack with a set IP address for us Reading ...
4
votes
2answers
4k views

DHCP Server with multiple scopes. Which one does it use to handout an IP?

I have 4 DHCP Scopes. 10.200.0.0 <--------DHCP Server Lives Here 10.54.0.0 10.16.0.0 10.32.0.0 A DHCP broadcast request is sent to my DHCP server. How does it decide which scope to pull an ...
0
votes
1answer
940 views

How to configure vlans with server 2003 DHCP

How do you configure Server 2003 to handle vlans? I believe I need to use the IP Helper in DHCP, but am unsure and am unable to find a decent tutorial or guide on doing this. Can someone help me or ...
0
votes
2answers
131 views

Provider cable in switch? [closed]

Is that possible to get internet connectivity if cable will be plugged into switch port? Something like that - Provider - Switch - Router. Switch is a L2 managed unit, and router running RouterOS. ...
1
vote
1answer
7k views

One Domain Controller and DHCP Server for multiple VLANS

Currently I have a network separated into two vlans and all the IP addressing is done statically; we are planning to put into place a domain controller and DHCP. My questions are Does the domain ...
10
votes
2answers
14k 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 ...
0
votes
1answer
168 views

Deny DHCP relay by corporate security policy

I've been presented with some odd "security conventions" in a large company I'm contracting with and am trying to get some perspectives on them. I need to build a number of servers virtualization ...
2
votes
1answer
5k 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 ...
0
votes
1answer
1k views

Cisco IOS: One SSID doesn't pull from the correct DHCP pool

I have 2 SSID setup in my Cisco 881W router. Our internal ssid pulls from the right DHCP pool (wpool), while our guest SSID does not pull from the right pool (gpool) Here is the router config ! ! ...
1
vote
1answer
2k views

Server 2008R2 - Weird DHCP/DNS/VLAN issues

I need your help explaining this one. The other day I was notified that someone had unplugged one of our IP phones and it wouldn't come back up. As the day progressed, more and more phones started ...
0
votes
2answers
2k views

VoIP phones getting back ip address: problem with dhcp zone or vlan

I have some Mitel IP phones that are giving me trouble on a network I recently inherited. I literally came in on for my first day supporting the system on Monday 12/28 to find the fiber connection to ...