DHCP and Vlan

i've got a 1700 router with subinterface fast ethernet 2 assigned to vlan 2 with dot1q trunking.i want to setup dhcp on the router.the native vlan is not used.i'm only using vlan 2.will the hosts receive ip addresses automatically for vlan 2 or do i need to setup helper addresses ?

Hi,
You can indeed set up the router to be a DHCP server, which means that you will not need to configure any helper addresses.
If a DHCPDISCOVER message comes in over your fastethernet sub-interface, the router will respond with an address.
Here's a sample config:
service dhcp
ip dhcp pool DCHPPool1
network ! network and mask you want to assign
default-router ! ip address of router
dns-server
ip dhcp excluded-address
(since you don't want it handing out addresses such as the router's address)
Hope that helps - pls rate the post if it does.
Regards,
Paresh

Similar Messages

Cisco RV180 problem with DHCP and Vlan

Hi,
I have a RV180 router and I need it mainly for routing a /26 subnet over three vlans
VLAN ID
IP Address
Subnet Mask
DHCP Mode
DNS Proxy Status
1
82.xx.xx.xx
255.255.255.192
DHCP Server
Enabled
2
192.168.10.1
255.255.255.0
DHCP Server
Enabled
3
192.168.3.1
255.255.255.0
DHCP Server
Enabled
vlan 1 (default)
will be the default one and will have the ip 82.x.x.x, on this vlan I want to put two webservers with static/external ip
vlan2
will be for office use with the ip 192.168.10.1. I need for this DHCP enabled to give computers the correct ip in form 192.168.10.x. I will be configuring the static DHCP later on for those comps.
vlan3
will be for management with the ip 192.168.3.1. I don’t need DHCP will be using a static ip.
VLAN ID
Description
Inter VLAN Routing
Device Management
Port 1
Port 2
Port 3
Port 4
1
Default
Enabled
Enabled
Untagged
Untagged
Excluded
Excluded
2
Vlan2
Enabled
Enabled
Excluded
Excluded
Excluded
Untagged
3
Vlan3
Enabled
Enabled
Excluded
Excluded
Untagged
Excluded
Everything works, on port 1 the servers work with their static ip, on port 4 the office computers receive the correct ip from DHCP, 192.168.10.x and even on port 3 the dhcp works for my management ip. But randomly some computers start losing connectivity, some regain it but some won’t connect even if I use a static ip corresponding to their vlan. When I say they won’t connect I mean I can’t ping their gateway or the management ip of the router (all vlans have inter vlan routing enabled so no matter on what vlan I am, I can access the web interface for the router). It;s not from security settings on the computers or firewall.
I discovered they will connect if I use the static ip corresponding to vlan1 82.xx.xx.xx, but not the ip corresponding to their port number. DHCP stops working for a while, it will recover randomly.
What am I doing wrong? I don’t have other switches I could use for DHCP, I thought I could use some managed switches to solve the DHCP problem.
Thanks,
Razvan

I tried with only two vlans and set the DHCP active only for the office "vlan2". Computers receive the correct ip but some of them won't register on the network, i tried to set the ip manualy on the computers but that computer will still be isolated.
Ex: computer A receives ip 192.168.10.25, Subnet 255.255.255.0, Gateway 192.168.10.1, for 2-3 minutes i can access the router on 192.168.10.1 and the internet, after a random time interval the gateway won't even respond to ping.It's not from firewall related issues as i set to accept all both incoming and outgoing. If i set a manual ip corresponding to vlan1 "default" everything works.It's like that computer is isolated so i believe it has to do with the asignment of Tagged, untagged and Excluded settings on the vlans.

How do I add a Subnet and vlan with a catalyst 3550 and RV120

Hello Friends.
I have a scenario that i'm hoping i can get some help with. I'll be as detailed and descriptive as i can.
This is for a business with 100 employees nodes and 100 camera nodes all needing IP internet through private addressing and public gateway.
I have a business class gateway with a private range of 12 public addresses. Ther modem does nothing but act as a gateway since i have disabled the firewall and DHCP.
In place of the firewall and DCHP from the modem i have installed a RV120 Firewall with VPN. When installing i replicated the IP scheme of the modem as to not disturb and distrup the devices assigned addresses from that scheme from the modem. I did this because the owner could not have any down time or any disruption to the business operations.
The RV120 now acts as firewall , DHCP , and VPN. I'll address the subnet first. I's using 10.0.0.0/24 subnet range.
DHCP is assigning 10.1.10.50 - 10.1.10.100 the rest are static and i plan to use static DHCP with the IP and MAC assigned to each static DHCP address.
There are 100 cameras with static IP addresses in the range of 10.1.10.11 - 10.1.10.40, and 10.1.0.1.101 - 10.1.10.170.
VPN uses PPTP assigned address 10.1.10.6 - 10.1.10.10.
There are no layer 3 switches that i know of. Just a layer two that is the primary swith and ports have run out, and various out of the box switches and wireless access points connected to the primary switch.
I want to implement subnets into the network and VLANS as well on a new Layer 3 switche from cisco. Thinking 3550 from Cisco or one of the older layer 2 switches with layer three capabilities.
I also want to introduce a 192.168.0.0/24 IP range for the existing wireless network and segment the traffic from the rest of the traffic on other ranges.
I want to replace the 10.0.0.0/24 DHCP alltogether and the static addresses for end user nodes on the same network, but keep that range just for camera nodes segmented.
I want to implement a NEW end user IP range and VLAN for employee/guest networks using the 172.16.0.0/24 range.
Iv'e thought of replacing all the wireless nodes with RV120's and use VLAN. Dont know if that strategy works. Need to think it through.
I want the 192.168.0.0/24 IP range comunicate to with the 172.16.0.0/24 and possibly the 10.0.0.0/24 range.
Any advice on how to do this?
As a side note the next step after this is to install a server domain controller as all the computers are all stand alones in their own workgroups. It's a simultaneous project that will introdue a DCHP, WINS, DNS server.

Hi Omid, it sounds like you're proposing the 3550 switch but you're not decided yet. The 3550 switch is a pretty old device and needs enhanced multilayer image. It may be more prudent to use a more current switch such as small business SG300 or SG500 as the feature set is more rich and it supports around 480 LAN connections.
To answer the inquiry, the RV120W, when you create a VLAN it will automatically create an IP interface. From this you may assign subnet as you like along with 'enable or disable' for inter vlan routing. Since the RV120W has this feature, a layer 3 switch is not required unless you are looking to keep the routing load smaller by routing locally with the switch.
With Catalyst or a small business switch you would need to create a VLAN. After creating the VLAN, on a Catalyst you can simply issue "switchport trunk encapsulation dot1q" on the desired interface and all VLAN will passage without issue. For a port connecting a user "switchport mode access" "native vlan xx" This will assign the port as untag member of the desired VLAN.
If using a small business switch, it is slightly different, you still create the VLAN but the command issue is a bit different "switchport trunk allowed vlan add xx" for the link to the router, where xx = the VLAN ID to tag to the router. For access client it remains the same as Catalyst.

DHCP and QoS

Hi all ,
I'm looking for some way to base the QoS in my LAN on the host's IP address . Of course , there'r many hosts in that network , some of them get their addresses from the DHCP and anyway the question is - is there any way to make the class-maps based on the host without enter the commands manually ? Maybe bind them to DHCP allocation ? Obviously , ACL will do the job but with many hosts on LAN that task becomes very complicated (to me and ,maybe the router too ... just think about many ACLs and MQC commands related to any one among these ACLs) . The perfect solution will be some sort of template , which became active for any device in the LAN ... grouping all together into some "global policy" running on the router . As it happens to be for remote-access clients (L2TP for instance) .
I'd appreciate any advice ,
have a nice day ,
Alex .

Hi Alex,
I dont think so that you can make class-maps using hostname.
if there are good number of hosts, you can create a separate VLAN for them and make a ACL for that particular subnet. so this way your ACL wont grow..
hope this helps ..

Bootpd, DHCP and OS X Server 2.2

I have a Mac Mini running OS X Server in Mountain Lion that I use for imaging via DeployStudio. A couple of days ago, I tried to boot a MacbookPro using Netboot by going to Start-up Disks, and selecting the Netboot image. When the machine restarted, it just sat at the grey screen for about a minute, then it started flashing the globe icon, as it was trying to find the Mini. After about a minute of that, it would give up and then boot back to the OS. I tried this with a NetInstall image, another NetBoot image, another machine, and so on. All of them had the same behavior.
After going through some logs and looking at the documentation, it turned out that the machines really couldn't find the Mini to boot from. Basically, if the DHCP service wasn't turned on, and configured for the same subnet that the Mini was on, then nothing could find the Mini to boot from it. This was bad, really bad, as l work for a large achadimc instatution where they run their own DHCP services for all of the subnets.
The issue turnes out to be that as of 2.2 of OS X Xerver, that the bootpd service doesn't launch by itself anymore. The DHCP service must be running for bootpd to launch. Netboot needs bootpd for the clients to find the host. The solution that I came up with was to modify the /etc/bootpd.plist file.
There are, as of when I am writting this, two versions of Netboot. Netboot 1, or old Netboot, allows the bootpd service to run without DHCP, and Netboot 2 that requires DHCP to be on for bootdp to launch. I went into the /etc/bootpd.plist file and added the following lines to the bottom, just before the closing </dict> tag:
<key>old_netboot_enabled</key>
<array>
<string>en0</string>
</array>
This turns on the old netboot so bootpd could run on its own. You'll have to restart the machine running OS X Server for the change to take affect.
There a couple of downsides to this method. One is if you turn on Internet Sharing in the Sharing system pane, or if you happen to turn on or change the DHCP settings in any way, your changes will be wipped out.
I hope this helps somebody out that that had the same issues that I had.
Micah

Hi Micah,
I have try your solution but it doesn't work.
First Excuse me for my english writing 'cause I'm french...
So the problem is complex, here is my Situation :
Netboot Server : A brand new mac mini server with 10.8.2 server (late 2012, macmini 6,2), 2 terabyte hard drives of each and DeployStudioServer 1.5.16
The services Netinstall, OpenDirectory (master mode) and AFP file sharing are all ok !
I have an external DHCP (linux) server. The DHCP server is on a vlan and the netboot server and netboot clients are on another clan, so I have
add ip address of my netboot server as a ip-helper address in the cisco router configuration of the dhcp server vlan.
And HERE IS MY PROBLEM :
I have used three kinds of netboot's client :
1. a macbook pro 17" (macbookpro 5,2, 17" early 2009) with mac os 10.6.8
2. a macbook pro 13" (macbookPro 9,2 13" mid 2012) with mac os 10.8.2
3. a Mac mini late 2012 ( macmini 6,1) with mac os 10.8.2
I have generate 2 DeployStudio Netboot sets, one for the macbook pro 13 " (10.8.2) and one for the mac mini late 2012 (10.8.2)
SO, It works without problem when I netboot with macbook pro 17" which use for example the netboot set of macboo pro 13" but the other machines don't net boot ! Why ???
In the netinstall logs and when I netboot with macbook pro 17 under 10.6.8, I saw the lines :
b 18 08:43:23 [my-netboot-server] bootpd[2825]: BSDP DISCOVER [en0] 1,0:26:4a:c:d1:8 NetBoot002 arch=i386 sysid=MacBookPro5,2
Feb 18 08:43:23 [my-netboot-server] bootpd[2825]: replyfile /private/tftpboot/NetBoot/NetBootSP0/mbpro-13-1082.nbi/i386/booter
Feb 18 08:43:23 [my-netboot-server] bootpd[2825]: replying to 0.0.0.0
Feb 18 08:43:23 [my-netboot-server]bootpd[2825]: BSDP OFFER sent [1,0:26:4a:c:d1:8] pktsize 360
but when I netboot with macbook pro 13" under 10.8.2, I see only the lines (for example ) :
Feb 18 09:01:07 [my-netboot-server] bootpd[2968]: service time 0.000015 seconds
Feb 18 09:01:40 [my-netboot-server] bootpd[2968]: service time 0.000015 seconds
Feb 18 09:01:40 [my-netboot-server] bootpd[2968]: service time 0.000004 seconds
Feb 18 09:01:52 [my-netboot-server] bootpd[2968]: service time 0.000015 seconds
Feb 18 09:01:52 [my-netboot-server] bootpd[2968]: service time 0.000010 seconds
Feb 18 09:02:08 [my-netboot-server] bootpd[2968]: service time 0.000015 seconds
PLEASE HELP ME, I DON'T UNDERSTAND WHY IT WORKS WITH A "10.6.8" OLD CLIENT AND NOT WITH MY NEW MACS UNDER MOUNTAIN LION ?
HAVE YOU ANY IDEA ?
THANKS IN ADVANCE TO ALL FOR YOUR HELP
BEST REGARDS

SG300-20 - Configure DHCP on VLAN interface

I have been reading the various related discussions on the SG300 and SG500 switches regarding setting up VLAN's and DHCP on those VLAN's. For whatever reason I have been unable to even get this simple task to work.
First thing I did was to update my firmware and boot version as follows:
SW version    1.3.7.18 ( date 12-Jan-2014 time 18:02:59 )
Boot version    1.3.5.06 ( date 21-Jul-2013 time 15:12:10 )
HW version    V02
When I reloaded the SG300 after the SW/Boot updates the startup config was wiped out and I had to setup my switch from scratch. The intent is to have two VLAN's:
VLAN 1: all devices, servers, etc.
VLAN 2: basic subnet that hands out DHCP addresses
The SG300-20 is connected to an Asus RT-AC66U router on the 192.168.1.x subnet and provides internal network access and WiFi access (router IP address is 192.168.1.1 and is default gateway). All that works with no issues. So my task is simply to create VLAN 2 on 192.168.2.x subnet and use DHCP to allocate addresses. I have spent many hours on this and I still can't get it to work. When I connect a laptop to the port (GI8) assigned to VLAN 2, I end up getting some wonky 169.254.x.x address. I certainly thought something this "easy" wouldn't be that hard to setup, but apparently I was wrong.
The SG300 is running in L3 mode as shown in my running-config below.
Does anyone happen to see something that might be preventing my laptop client from recieving IP addresses from the VLAN 2 DHCP interface that are not in the 192.168.2.x subnet?
Any ideas / suggestions would be greatly appreciated!
Here's my running-config:
config-file-header
MYSTICSW1
v1.3.7.18 / R750_NIK_1_35_647_358
CLI v1.0
set system mode router
file SSD indicator encrypted
ssd-control-start
ssd config
ssd file passphrase control unrestricted
no ssd file integrity control
ssd-control-end cb0a3fdb1f3a1af4e4430033719968c0
vlan database
vlan 2
exit
voice vlan oui-table add 0001e3 Siemens_AG_phone________
voice vlan oui-table add 00036b Cisco_phone_____________
voice vlan oui-table add 00096e Avaya___________________
voice vlan oui-table add 000fe2 H3C_Aolynk______________
voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phone
voice vlan oui-table add 00d01e Pingtel_phone___________
voice vlan oui-table add 00e075 Polycom/Veritel_phone___
voice vlan oui-table add 00e0bb 3Com_phone______________
bonjour interface range vlan 1
hostname MYSTICSW1
logging host 192.168.1.15
logging origin-id hostname
username cisco password encrypted b4a0fcf20b2cd9d80a55b06ab8f83277f9733904 privilege 15
snmp-server location Office
clock timezone " " -5
clock summer-time web recurring usa
clock source sntp
sntp unicast client enable
sntp unicast client poll
sntp server 192.168.1.10 poll
interface vlan 1
ip address 192.168.1.254 255.255.255.0
no ip address dhcp
interface vlan 2
name MysticWAN
ip address 192.168.2.254 255.255.255.0
interface gigabitethernet8
switchport mode access
switchport access vlan 2
exit
ip default-gateway 192.168.1.1
Thanks in advance!
Clint Lambert

Tom,
Thanks ... I followed the steps you outlined and it worked! The only difference being that I have an Asus RT-AC66U router and the there is no "enable multiple subnet" option. So, I just followed your instructions on creating the static routes in the RT-AC66U and everything worked. The DHCP addresses were correct and I had internet connectivity when I plugged a laptop into the gi8 port.
I did make one tweak to the Network Pools screen as follows:
My DHCP configuration for gi8 on VLAN 2 now looks like:
ip dhcp server
ip dhcp pool network InternalWAN
address low 192.168.2.1 high 192.168.2.99 255.255.255.0
lease infinite
domain-name MYSTIC
default-router 192.168.2.254
dns-server 8.8.8.8
Previously I had followed your advice in the article "Need help configuring SG300-10 switch" and had setup everything using CLI. However, I didn't think about needing the static routes. So, I think it was probably setup correctly beforehand but had no chance to work because the routes were not setup.
Thanks very much for your help!
Clint

DHCP and Radius

Hi,
We are trying to migrate a secure wlan that uses certificates on client laptops.
The ultimate goal is point the secure wlan to a new DHCP server which also has a new Enterprise certificate. Currently, the old server provides the Enterprise certificate and the DHCP scope for the sercure wlan. When we attempted to migrate the secure wlan previously the 5508 could not perform 802.1X communcations with the new server since it didn't have the certificate.
Question: for the secure wlan can we point it at the new server for DHCP and point it at the old server for the Enterprise certificate until such time we can get the certificate on the new server?
The secure wlan does use Radius pointing to the new server.
Thanks.

http://www.cisco.com/en/US/docs/ios-xml/ios/ipaddr_dhcp/configuration/xe-3s/DHCP_Server_RADIUS_Proxy.html#GUID-4C505B07-76D0-43D2-8FF9-2A71FB2685FC
Configuring the DHCP Server for RADIUS-based Authorization
Perform this task on the DHCP server to configure address allocation for RADIUS-based authorization of DHCP leases.
SUMMARY STEPS1.    enable
2.    configure terminal
3.    service dhcp
4.    aaa new-model
5.    aaa group server radius group-name
6.    server ip-address [auth-port port-number] [acct-port port-number]
7.    exit
8.    aaa authorization network method-list-name group group-name
9.    aaa accounting network method-list-name start-stop group group-name
10.    ip dhcp pool name
11.    accounting method-list-name
12.    authorization method method-list-name
13.    authorization shared-password password
14.    authorization username string
15.    exit
16.    interface type slot / subslot / port [. subinterface]
17.    encapsulation dot1q vlan-id second-dot1q {any | vlan-id[, vlan-id[- vlan-id]]}
18.    ip address address mask
19.    no shutdown
20.    radius-server host ip-address [auth-port port-number] [acct-port port-number]
21.    radius-server key {0 string | 7 string | string}
22.    exit

Problems setting up Verizon DSL (DHCP) and AirPort Extreme

I have Verizon DSL with DHCP and old router (Linksys WRT54G). I've bought iMac and new router (AirPort Extreme) to connect to iMac wirelessly. I have a Windows computer connected to the Linksys WRT54G. Now here is the story. I can connect verizon DSL modem (it's in bridge mode) to PC directly and connect to the Internet. When I plug AirPort between the DSL modem and PC, auto-configuration doesn't work, AirPort utility says there is problem with internet connection. Router simply can't obtain IP address from verizon's DHCP server. I've tried to copy DNS server addressed from the IP configuration in Windows, the AirPort light went green and Windows indicated connection as successful, however I still cound't browse the Internet because gateway is not set. Any ideas how to make AirPort connect to the internet using DHCP instead of manual settings? I can try to do it from the mac if needed, I don't think it would make any difference though.

Welcome to the discussions!
Sorry, I can't quite track exactly what you are trying to do.
What would the network that you are trying to set up look like?
Modem>AirPort Extreme>Computers? Are you saying that you won't be using the Linksys in the new setup?
Sounds like you need to set the Airport Extreme up to supply PPPoE service (which the Linksys is doing now-if the modem is in bridge mode), but I will wait for your response before offering specific info.
If you've been fiddling with settings, we may need to do a hard-reset on the AX to start over. You should not be fiddling with DNS, etc. Almost always, these settings are done automatically when you have the device set up correctly.

Apple Airport Extreme Base Station for PPPoE, DHCP and NAT with ActionTec DSL modem

I just spent several hours trying to track down proper instructions for setting up my Apple AEBS to do the PPPoE, DHCP and NAT while connected to an ActionTec M1000 (no wireless module). It turns out my initial set ups on both devices were correct, but that the order for rebooting and reconnecting the two devices is critical. All of the threads I found on this forum and on many others suggested this was not possible, but it is. What I don't yet know is whether it is the best method for running my home network DSL connection to my ISP (CenturyLink).
The instructions I found that worked come courtesy of Brandon Konkle's blog and are both simple and clear: http://brandon.konkle.us/post/19637529637/centurylink-actiontec-q1000-airport-ex treme-bridge
The proper settings for the ActionTec DSL Modem can be found under Advanced Setup/IP Adressing/WAN IP Address
Click RFC 1483 Transparent Bridging then click on Apply.
(see also http://qwest.centurylink.com/internethelp/modems/m1000/pdf/M1000_BRIDGE.pdf )
To reduce time, do this BEFORE you reset your AEBS then set the AEBS so that you don't have to wait for the AEBS to reboot.
In contrast to what Brandon described for the Q1000 modem, my AEBS never reconnected to the modem (he describes his as getting an IP from his ISP, then dropping it then getting another over and over - mine never got an IP). Once you have reset both devices as described, the critical steps I have not found described elsewhere were:
1. Disconnect the power from both the modem and the Airport Extreme.
2. Disconnect the Ethernet cable between the two devices
3. Restore power to the 2 devices and allow them to fully reboot. For the ActionTec M1000, this is indicated when the lights stop blinking. (Note that the Internet light will NOT be lit in this instance since the modem is acting only as a bridge. You will NOT have an Internet connection until the AEBS is reconnected.) The AEBS will be blinking yellow.
4. Reconnect the Ethernet cable between the devices (make sure on the M1000 that you are using the connector with the circle icon over it, not the arrow icon).
Within about 60 seconds, the AEBS light went to steady green and the connection to the Internet was restored.
Now I have to see if this is a more stable configuration than the flaky one I had before while using the AEBS as a bridge and the M1000 to do everything.
Does anyone think or know if it will make a difference?
Message was edited by: Bud Shaw

Now I have to see if this is a more stable configuration than the flaky one I had before while using the AEBS as a bridge and the M1000 to do everything.
Does anyone think or know if it will make a difference?
No one can accurately predict in advance what the actual results might be. I've tried both ways with different products and cannot say that one method is better than the other. What works is best.
In theory, it is preferable to have the modem provide the PPPoE connection service since it is the device connected directly to the Internet.
In practice, results vary depending on the service provider, products used, phase of the moon, alignment of the planets, etc.

Non-ISP DDNS with Apple DHCP and DNS Services

I have two questions about Dynamic DNS (DDNS) as it applies to Apple's DNS and DHCP services within my home network. I am not talking about DDNS in the context of making my external-facing router available by a domain name on the Internet using the dynamically-assigned IP from my ISP.
Starting with Snow Leopard Server, I attempted to use Apple's DNS and DHCP services (I have the firmware-based DHCP service in my router turned off.) The difficulty I immediately faced was that Apple's DHCP implementation didn't update the DNS service as IPs were handed out to DHCP clients. Because of this, it wasn't possible to access hosts by their hostname, since getting a DHCP-assigned dynamic IP at boot-up didn't do anything to automagically register the hostname-to-IP mapping in DNS. Manually registering the hostname in DNS was pointless, becuase over time the client IP address can and did change. I could create static IP assignments based on the MAC address, but doing that for all of the devices on my home network sort of defeated the purpose of using dynamic IPs.
The only solution I eventually found was to go out and get an open source DHCP server, compile it for my Mac, install it, and configure it. After doing this, everything worked great; every time a new host or other device was booted it got a dynamic IP through DHCP, and then the DHCP server automatically updated Apple's DNS serive with the hostname and assigned IP. I could immediately access every device on my network by hostname. As IP addresses changed over time, the hostname-to-IP mapping in DNS was automatically updated.
Except, Apple's point upgrades kept breaking my non-Apple DHCP install. Every time I applied software updates to my server I had to go back and re-finagle DHCP to get it to automatically start and run. By the time Lion Server came out, I drank the Kool-Aid and went back to Apple's DHCP implementation. I was disappointed that it still didn't seem able to update DNS with hostnames as it assigned IPs, but I was so tired of mucking about at the command prompt to fix DHCP every time Software Updates broke it, I just lived with the inconvenience of not being able to access devices on my network by hostname.
I'm sorry to say this, but Windows Server has had this capability since at least server 2003. In fact, until I dumped my Windows Server and switched to Snow Leopard Server, I was running Microsoft's DNS and DHCP services on Server 2003 and they did exactly what I'm describing brilliantly.
Can anyone offer any advice here? Does Mountain Lion's implementation of DHCP allow for DDNS updates to the DNS service? If not, how are other people handling this? Should I go back to running Windows Server for my DNS and DHCP services? My Netgear WNDR3700 router appears to have the standard, substandard DHCP server in firmware as most home routers, and no facility for DNS at all--much less the ability to update an on-site DNS sever with IP addresess it hands out. In fact, the only appliance I know of that does this is the InfoBlox my employer uses, but that's too expensive for a home solution.
As a Post Script, I'll add that I've been VERY unhappy that I lost the ability to bind Windows clients to Open Directory under Lion Server. Since I'm starting to see articles that say this capability hasn't been added back to Mountain Lion Server, I'm seriously considering implementing a Windows Server AD master and establishing a "magic triangle" or "golden triangle". If I end up having to do that, I wonder if I might as well just go back to using Microsoft's DNS and DHCP services.

Hi,
Whether to move your DHCP to another server depends on the workload of your server. If there are too many clients on the network, you should move your DHCP to another server.
Did the record which owned by the machine generate before you configure the DnsUpdateProxy group? You can try to regenerate the record and check the result.
For more detailed information, you can view the link below.
DNS best practices
http://technet.microsoft.com/en-us/library/cc778439(v=ws.10).aspx
Using DNS servers with DHCP
http://technet.microsoft.com/en-us/library/cc787034(v=ws.10).aspx
DNS registration changes for Windows Server 2003 based DHCP Servers
http://technet.microsoft.com/en-us/library/ee441167(v=ws.10).aspx
Hope this helps.
Steven Lee
TechNet Community Support

How to set up DHCP and NAT for QNAP NAS MyCloud service?

I have an Apple AirPort Extreme Base Station (AEBS) attached to my DSL model (no router in the modem). My QNAP NAS is attached via ethernet to the QNAP NAS. My iMac (running AirPort Utility 6.x) is connected to the AEBS via wifi.
I've found several folks who've tried this (and apparently succeeded) but I'm a networking novice and am having trouble making this work. What I did was to go into the AirPort utility and in the networking section configure "DHCP and NAT" and then called out the static IP and MAC address of the QNAP NAS (as well as the ports I'd like to remain open). However, when I did this and applied the changes, my iMac (connected to the AEBS via wifi) could no longer see the AEBS, which then required me to reset the AEBS, re-configure it back to the previous known good conifiguration and start over. After about 5 cycles of this I gave up.
So, what am I doing wrong here? Do I need to go in and configure every device that is going to access the AEBS as static and call out each device's IP and MAC address? (hopefully not, that'd be a major PITA).
Help. Anyone?

When I run diagnostics with the QNAP, here is the reply I get (IPs redacted):
------ NAT PMP Diagnostics ------
initnatpmp() returned 0 (SUCCESS)
using gateway : xx.x.x.x
sendpublicaddressrequest returned 2 (SUCCESS)
readnatpmpresponseorretry returned 0 (OK)
Public IP address : 192.168.xxx.xxx
epoch = 2621
closenatpmp() returned 0 (SUCCESS)
------ UPnP Diagnostics ------
upnpc : miniupnpc library test client. (c) 2006-2011 Thomas Bernard
Go to http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
for more information.
List of UPNP devices found on the network :
desc: http://xx.x.x.x:60606/8CC1212D0C6D/Server0/ddd
st: upnp:rootdevice
desc: http://xx.x.x.x:9000/TMSDeviceDescription.xml
st: upnp:rootdevice
desc: http://xx.x.x.xx:55000/nrc/ddd.xml
st: upnp:rootdevice
desc: http://xx.x.x.xx:55000/dmr/ddd.xml
st: upnp:rootdevice
desc: http://xx.x.x.xx:49152/4/description.xml
st: upnp:rootdevice
desc: http://xx.x.x.xx:49152/2/description.xml
st: upnp:rootdevice
desc: http://xx.x.x.xx:49152/0/description.xml
st: upnp:rootdevice
desc: http://xx.x.x.xxx:8200/rootDesc.xml
st: upnp:rootdevice
desc: http://xx.x.x.xxx:49152/gatedesc.xml
st: upnp:rootdevice
desc: http://xx.x.x.xxx:49153/gatedesc.xml
st: upnp:rootdevice
desc: http://xx.x.x.xxx:49155/gatedesc.xml
st: upnp:rootdevice
desc: http://xx.x.x.xxx:9000/TMSDeviceDescription.xml
st: upnp:rootdevice
UPnP device found. Is it an IGD ? : http://xx.x.x.x:60606/
Trying to continue anyway
Local LAN ip address : xx.x.x.xxx
GetConnectionTypeInfo failed.
Status : , uptime=3217870016s, LastConnectionError :
Time started : Wed Mar 13 17:04:03 1912
MaxBitRateDown : 7 bps MaxBitRateUp 0 bps
GetExternalIPAddress() returned -3
GetExternalIPAddress failed.
GetGenericPortMappingEntry() returned -3 ((null))

Logical network to physical network mapping (subnets and VLANS) in SCVMM 2012 R2

In much of the blogs, documentation and literature on VMM, there are examples of deploying multiple logical networks onto one physical network i.e. Cluster (logical) + Storage (logical) + Backup (logical) + Live Migration (logical) + Management
(logical) on top of Datacenter (physical).
Does this mean it would be possible to have one (physical) flat VLAN-less network with one subnet and then have all those logical networks (with subnets and VLANs) on top of it? Even with a simple unmanaged L2 switch that doesn't support VLANs itself?
If not, just how do you map multiple logical networks to just one physical network? How does that work in practice? Is a L3 switch needed to route traffic between logical networks for example?

Hi. VMM Networking may be overwhelmed for the most, at first. But you really need to understand the modeling here and how things are related to each other. Especially if using NIC teaming in WS 2012 (and R2) together with this mix.
I suggest that you read the following whitepaper where we explain how to setup networking in VMM (also to support network virtualization, but that is absolutely not mandatory): http://gallery.technet.microsoft.com/Hybrid-Cloud-with-NVGRE-aa6e1e9a
-kn
Kristian (Virtualization and some coffee: http://kristiannese.blogspot.com )

DHCP and mtu size in rc.conf

Is it possible to set an interface to use both DHCP and a custom MTU size by setting the value in rc.conf?
I tried using the line "eth0="dhcp mtu 9000", but that did not work.

There is a hackish way to do it:
eth0="dhcp"
eth0mtu="eth0 mtu 1234"
INTERFACES=(lo eth0 eth0mtu)
It is important that eth0mtu is after eth0 in INTERFACES.

RV320 DHCP and WAN questions

Hello all,
So far I love the RV320 its super fast and works really good (with 2 WAN connections).
I though have a few questions hoping someone could tell me:
1) Under DHCP Server it gives the option of to use DNS from ISP or DNS Proxy, what is the main difference between those two options?
Right now I have this set to DNS from ISP.
2) What are the pros and cons of enabling IPV6 DHCP and what is the best setting for that (Yes both ISPs I have suppor IPV6)?
3) What is the best option to set as client lease time for DHCP? (its set to 1440 default).
4) On the System Summary page I see both WAN1 and WAN2 connected (i set it to
Load Balance (Auto Mode) but for WAN2 i always see: Connected (Inactive)
Why does it say inactive?
Thank you!

Found answers to most things now except for:
4) On the System Summary page I see both WAN1 and WAN2 connected (i set it to
Load Balance (Auto Mode) but for WAN2 i always see: Connected (Inactive)
Why does it say inactive?

Solaris 10 x86 u5 dhcp and jumpstart install fail

hello
I have problem in solaris 10 u5 jumpstart install.
I can use jumpstart install with dhcp and get a static ip address (assigned by dhcp server) before solaris 10 u3.
But now I can't use jumpstart install in solaris 10 u5 without setting up a static ip address in sysidcfg.
I have many x86 machines.
If I have to set up every different sysidcfg for every machine when I install a new machine.
I will get into big trouble.
here is my sysidcfg
###### sysidcfg #######
system_locale=en_US
timeserver=localhost
timezone=Asia/Taipei
terminal=sun-color
security_policy=NONE
root_password=xxxxxxxx
nfs4_domain=example.com
network_interface=primary { hostname=solaris
default_route=192.168.100.254
netmask=255.255.255.0
protocol_ipv6=no}
name_service=DNS {domain_name=example.com
name_server=192.168.100.1
search=example.com}
Edited by: cheung79 on 2008/4/19 ?? 5:29

I think that you should modify the script discovery-install, so you'll be able to create the sysidcfg file dynamically. I had the same problem as you and there is a possibility to add some arguments to the boot command that you execute at the ok prompt. These arguments can be defined in the discovery-install script. It's quite easy.
Regards,
Przemek

DHCP and Vlan

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