The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol. DHCP allows for computers to be configured automatically to communicate with each other over an IP network without the need for setup by a network ...
3
votes
2answers
58 views
How do I specify the DHCP IP address ? (CentOS 5.3)
I would like to shorten the bootup time of my CentOS Virtual Machines. They are spawn up automatically during our test cycle. We noticed that it could take up to 15 seconds to obtain an IP address ...
1
vote
1answer
47 views
Why does a PXE-booting VM aggressively seek Reverse ARP?
Reverse ARP is.. well, pretty much dead, as far as I'm aware? One of the great Internet success stories in killing off a protocol? It's been deprecated in favor of BOOTP (and later, DHCP) for almost ...
3
votes
2answers
43 views
Setup DHCP split scope but second server won't give leases
My work setup had only one Windows 2003 DHCP Server which resides on DC01. I wanted to improve the redundancy for DHCP so I installed DHCP services on another server (DC02) which is also a DC and DNS ...
6
votes
3answers
121 views
How do I convince Dell blades to PXE Boot
Scenario:
Brand new Dell M610 blades.
Connected to the network with a 10GE uplink into a Dell PowerConnect M6220 blade switch.
DHCP server evidently working, as everything else boots / gets ...
-1
votes
2answers
79 views
Weird Mac Address at Windows 2003 DHCP Server
I am trying to configure a reservation for my Galaxy.
The problem is that my DHCP is giving out an IP address to an obviously invalid MAC address (Galaxy Mac Address) - Please note attached ...
7
votes
1answer
151 views
MAC addresses on dual-NIC mainboards
Here's a weird problem.
We've got a number of devices with dual-NIC mainboards. Some are Realtek NICs, which suck. Some are Intel e1000s, which don't.
I've just noticed on 2 machines, one is an ...
1
vote
1answer
88 views
settings for network with dhcp server
We are trying to fix a problem in a network with this setup:
DHCP Server (and all stations) connected to a gigabit switch connected to a router.
What should the Gateway and DNS values be on each of ...
0
votes
0answers
58 views
SBS 2003 Routing and Remote Access switches back to DHCP on server restart. Why?
What am I missing here?
I have RRAS set to a static address pool but whenever the server restarts it switches back to DHCP.
DHCP is running on the server, but it is set to a different scope. As far ...
0
votes
1answer
19 views
Seperate Network Cards - Clients cannot resolve
I have a domain controller that is also a DNS server for our internal clients it has two network cards within the Machine, presently one of them is disabled and the other is configured in the ...
2
votes
3answers
125 views
Why can Windows machines resolve local names when Linux can't?
I have a small network with Windows and Linux machines connected to a D-Link DIR-825 router.
The Windows machines on the network can reach all other machines by name while the Linux machines only can ...
0
votes
2answers
32 views
bind9 forward records, not just zones
The situation I am faced with is that I have a few domains hosted with UltraDNS and also with a bind9 server for local use with internal subdomains and for dhcp hostnames.
For example, domain.com is ...
1
vote
2answers
107 views
Why is dhclient issuing a unicast DHCPREQUEST every ~15 seconds instead of at T1/T2 timers?
I am running a CentOS 6.2 server as my gateway and firewall, while also providing some internal services. This is a setup I have had for years using various hardware and distributions (redhat based). ...
0
votes
2answers
77 views
get addresses assigned by dhcp3-server
I use dhcp3-server to serve addresses to the 4 enet ports on my gigE card in my linux box. The interfaces are eth1 to eth4 and are addressed 192.168.x.0 whefre x = 1,2,3,4.
How may I get ...
0
votes
3answers
79 views
How to bind an IP to a specific switch port with DHCP
I have servers connected to multiple Juniper EX4200 based virtual chassis. In order to make them hot swappable without manual reconfiguration, I would like to be able to always give the same IP, with ...
0
votes
1answer
82 views
Event ID 10020 on my DHCP Server
Every time I restart my server (Windows Server 2008 R2 Enterprise) the following DCHP events appear with the ID 10020 in my event log. I have a static IPv6 address but this event is still being ...
0
votes
0answers
85 views
How does DHCP assign IP addresses to interface aliases? [closed]
I am a university student. The university allots static IPs to interfaces. I am working on a machine with interface eth0 : 112.112.13.1 and it has an alias eth0:0 112.112.13.109. Both have the same hw ...
2
votes
1answer
21 views
What's the difference between REBOUND and RENEW state on DHCP Client?
According to various DHCP description after reaching 50% client will enter RENEW state and will start sending DHCPREQUEST messages to the server in order to renew the lease. It will continue to send ...
2
votes
2answers
68 views
Allow DHCP clients to use public DNS server when domain server is down
I have a small network with a Win SBS 2k3 (SP1) domain... how do I set it up so that the workstations (they're all DHCP clients) can still resolve domain names if the domain server is down (without ...
0
votes
2answers
51 views
2 networks with a layer 2 bridge that shouldn't be there.
I have 2 separate networks that I manage. They have a router between and layer 3 connection is working fine. Last week my DHCP servers started handing out IPs across the networks, looking around I ...
0
votes
1answer
39 views
Combine static and dynamic setup in dhcpd.conf
I'm trying to migrate from a situation with static ip addresses and a dhcp server on a router to one new dhcp server.
My idea was to add the current static ip addresses as static ip addresses in the ...
3
votes
3answers
120 views
Ranges for Multiple DHCP Server: Better to overlap or separate? wireless vs ethernet clients?
I know there are mixed feelings about running multiple DHCP servers on one LAN, but I'm wondering about the best way to set their ranges.
In my case, I have a router which performs DHCP and also my ...
0
votes
3answers
175 views
Building a PXE/WDS infrastructure with both Windows Server 2008 and Linux PXE Server
What I want to do is the following:
I have a Windows Server 2008 R2 (DC) with a running Active Directory. I added the role Windows Deployment Services and installed both Windows® Automated ...
2
votes
1answer
79 views
How to save DHCP option 43 on Windows 2008 server?
I need to retrieve the DHCP option 43 from my DHCP server (Linux ISC DHCP server) on a Windows 2008 server (or any other Windows version, as long as the code 43 is specified in the Parameter request ...
1
vote
3answers
83 views
Building linux infrastructure that similar to windows solutions
I am working on Microsoft gold partner organization in last 3 months. All of our IT solutions based on Microsoft products. Here are the basic lists of products that we using our maintenance
DHCP
...
0
votes
2answers
113 views
DNS and DHCP addresses aren't matching up
Server 2008 R2 DNS and DHCP server (same server).
For some reason over the last few months I've noticed that many of my DNS entries are incorrect. I'll try to remote into a computer via hostname, ...
1
vote
0answers
19 views
DHCP Admin Member account not displaying scope
I made a domain name test.com on serv1 computer with dc and dns roles. On serv2 pc i added it to the domain and added the role of dhcp with 1 scope and authorized it and it is working fine.
I ...
0
votes
0answers
42 views
DHCP and/or DNS server with dynamic 'upstream'
I have a Windows 2003 server acting as a DHCP server (among other things). I want the clients on the internal network to resolve addresses using DNS, but the problem is that the network is sometimes ...
3
votes
1answer
145 views
How can I change the MAC address of a network bridge in Windows?
I use DHCP reservation rather than static IP for convenience, and that relies on the MAC address of my computer.
I recently bridged my main adapter with my VirtualBox adapter. When things stopped ...
2
votes
1answer
35 views
DHCP v6 Option for Circuit ID
DHCP v4 has Circuit ID option(82:1) for defining the actual interface ID of the Client.
What is the equivalent option in DHCPv6?
-1
votes
2answers
170 views
DHCP for wireless, fixed for others [closed]
I've run into a situation where I need to have DHCP running for my wireless clients and fixed IPs for everything else.
I have absolutely no idea how to do this, tried searching here on serverfault, ...
0
votes
1answer
96 views
DHCP v6 client MAC address
I am new to DHCPv6 ..In DHCPv4 we have chaddr field to get the Client MAC address from the DHCP message..Similarly how to get the Client MAC address in DHCPv6. RFC doesn't give this details..Could you ...
0
votes
0answers
58 views
DHCPv6 lease query from IPv4 network
I am in the urgent need of the following information.
I have v4 network. Here i am using DHCP server for allocating the Ip addresses to Clients in the network. For management purpose i have one ...
2
votes
2answers
93 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 ...
1
vote
1answer
41 views
What is the best way to authenticate only certain computers/devices on a network for a web server?
Currently I'm trying to use Windows Firewall service and select 'only these accounts'...but that isn't working. Normal access to file shares works by selecting said accounts but not to the web server ...
0
votes
0answers
37 views
DHCP Server integration with RRAS and DHCP Relay RRAS service - DHCP Relay Agent looks like redundant service?
lets suppose we have a following configuration:
a Windows Server 2003 R2 machine with DHCP and RRAS services installed
the machine has one NIC
the machine is in NATted LAN, with port redirection for ...
1
vote
1answer
26 views
Define an exclusion for DHCP reservation
Lets suppose I define an IP address reservation in Windows Server 2003 DHCP Server. Is it mandatory to define an exclusion of this IP address also?
IP Scope: 192.168.1.1 to 192.168.1.5
IP ...
-4
votes
1answer
68 views
DHCP IPV6 Environment
in DHCPV4 for discover, request we mention the source ip as 0.0.0.0,what it could be the in DHCPv6.Similarly we mention the multicast address as 255.255.255.255 in DHCPv4 ,what could be the in ...
1
vote
1answer
103 views
Why does Debian squeeze forget its static IP address and seek a DHCP lease?
Hi have a Debian Squeeze box with eth0 and eth1.
In /etc/network/interfaces is:
auto eth1
iface eth1 inet static
address 10.1.2.208
netmask 255.255.255.0
gateway 10.1.2.1
But every 24 hours, ...
-1
votes
1answer
37 views
Removing a lease from dhcpd
Is there a way to set the lease for a single dhcp client to a very short time in isc dhcp? I'm trying to do this for troubleshooting purposes but I don't want to potentially end up handing out ...
2
votes
1answer
104 views
Passing client MAC addresses to DHCP server over VPN
I'm tasked with implementing VPN access on a gateway. The LAN DHCP server is configured to assign the same IP address to a given MAC address. I would like to have this functionality for clients who ...
3
votes
2answers
70 views
DHCP server over multihop network
My question involves how you should handle a single DHCP server for a multihop network: (in our case) you have one DHCP server and a network with a "row" of routers attached to each other (and only ...
0
votes
3answers
61 views
DHCP DNS Setup for small network
I have a small network of 20 computers and 3 servers. I current have a Sonicwall firewall that does the DHCP for me. The question I have is the following.
On the DHCP settings should I have the local ...
1
vote
1answer
81 views
ISC-DHCP-SERVER - Can different reservations get different options (router, DNS, etc)?
Suppose there's just one Ubuntu / ISC-DHCP (v3) server on the network. I've successfully been able to provide "DHCP reservations" meaning MAC foo gets ip 1.2.3.4, whereas everyone else just gets an ...
0
votes
4answers
261 views
2 DHCP servers on one network
I'm a student at the University of Antwerp and for my (and my colleague's) research internship we have to research the possibility of having 2 DHCP servers on the same network (e.g. the network of our ...
2
votes
0answers
127 views
Request multiple IP-addresses via DHCP on a single physical interface (OpenBSD)
On OpenBSD, is it possible to request multiple IP-addresses via DHCP on a single physical interface? It looks like DHCP leased addresses can't be assigned as aliases. I though of creating a virtual ...
1
vote
2answers
132 views
/32 subnets on Ethernet via DHCP
Is it possible to assign to an ethernet host via DHCP a subnet mask of only the host itself, e.g. 192.168.1.123/32? Do common operating systems support this kind of configuration?
I'd like for the ...
0
votes
1answer
130 views
Hyper-V virtual machine unable to get IP address from DHCP server running on same physical box
We have a Windows server 2008 R2 with two network cards running AD, DHCP, DNS and Hyper-V
The first nic is setup with a static IP address and DHCP, WDS, and DNS are bound to it.
The second nic is ...
2
votes
1answer
70 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 ...
1
vote
0answers
67 views
How can you route DHCP requests through a non-default gateway?
I'm hosting some KVM virtual machines on a server with two NICs, eth0 and eth1.
I have two networks 192.168.100/24 and 192.168.200/24.
I have set up bridges as per ...
1
vote
3answers
98 views
What are the advantages to DHCP server running on Windows Server 2003 R2 vs pfsense router?
I am taking over responsibility for the network at a small medical practice. I understand how the network is configured, but I want to know more about the why.
The network currently is Cisco modem ...
