Multiple dhcp networks

Server OS:   OS X Mountain Lion Server
Thanks in advance for helping! I am trying to setup an OS X server to provide a DHCP address to systems using multiple DHCP networks.
I have previously only had to provide DHCP services for a single simple network like:   192.168.14.xx      (192.168.14.50 - 192.168.14.199)
Now that I need to provide DHCP for multiple networks like:    192.168.14.xx,   192.168.15.xx, and etc.
I am not sure how to make sure that the IP address provided is for the correct network.

There are two ways to do this. If you have a network at 192.168.14.0/24 and you want to add another class C 192.168.15.0/24 you can simply expand your network to a /23. This would give you a contiguous block of addresses from 192.168.14.1 through 192.168.15.254. Now technically, you are using a class C range but applying class b subnet. Regardless, it should work. If you need to expand beyond this then you end up with trouble. If your base network is 192.168.14.0 and you go to a /22 then the base is shifted down to 192.168.12.0/22. This may cause issues if you have a log of devices in the center of your 14 network.
The second option is to define VLans and tag them. This will require work on the switches, the creation of virtual interfaces on OS X and then the creation of DHCP ranges based on the VLan.
In this case, your 10.8 server can span the VLans and then server devices on each of them.
Reid
Apple Consultants Network
Apple Professional Services
Author "Mavericks Server – Foundation Services" :: Exclusively available in Apple's iBooks Store
Author "Mavericks Server – Control and Collaboration" :: Exclusively available in Apple's iBooks Store

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Here's what I think is happening, and maybe someone can tell me if I right or wrong. NetBoot (or BSDP protocol) is a "broadcast" protocol. (That means it's always just floating around out there on the network. ) NetBoot (BSDP) protocol gets injected into the DHCP stream, and any machine that gets DHCP can get BSDP, and essentially NetBoot.
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Now, we have 2 DHCP servers. What happens is, a
a client will get some of it's BSDP broadcasts from
one DHCP server, and some from another... which it
does not like at all.
Not unless your new DHCP server is also a NetBoot server and is set to provide NetBoot services. BSDP and DHCP are not the same thing. If what you were saying were true, it wouldn't be possible to have DHCP and NetBoot offered by different servers.
It IS possible, however, that the two DHCP servers are causing problems by both servicing DHCP requests for the same clients. If you've got multiple DHCP servers on the same subnet (or your router's configured to pass DHCP requests between subnets), you should make sure that only one of the DHCP servers answers requests from any given client. In our world, our Novell server is the default DHCP server on our subnet, but I keep a list of excluded MAC addresses on that server so that my Macintosh clients don't get addresses from it. On the Mac OS X server, I'm careful to limit my address ranges only to those machines which have static address maps in NetInfo. That way, our servers coexist, but they don't overlap.
It's not clear from your message whether your previously solitary DHCP server was your Mac OS X server, or whether one of the two DHCP servers is that box. But whatever the servers are, it might be helpful to turn off one of them to see if the same problem occurs (assuming you can, without major network disruptions). If that's not possible, can you talk to your network admins to see if there's some way to isolate your clients and one of the servers--in other words, see if there's some way to keep DHCP servers from responding to the same requests.
There may be any number of other reasons why this problem has cropped up. You may need to dust off a hub and a copy of Ethereal or EtherPeek to sniff what's happening on the network. You might also try NetBooting in verbose mode, to see where the process craps out. IIRC, there'a decent guide for this kind of troubleshooting over at Bombich's site (www.bombich.com).
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Marcelo Lucas Guimarães - MCP, MCTS, MCDBA, MCITP Blog: http://mlucasg.wordpress.com

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So I'm trying to think this design out in my head. Here is what I have:
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Wow Christa great question. We see more and more people are trying to do this and this gives me a great chance to explain how to do this. If you already have a WAP4410N, its really easy and you will only need one to do it.
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Adding Guest Access using WRVS4400N
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Eric Moyers
Cisco Network Support Engineer
1-866-606-1866

Multiple DHCP on Multiple VLAN not working

Hi there;
In my core network switch, I have multiple VLANs, I have these command to assign to DHCP pools. I configured a port on my core switch for DMZ_VLAN and when I connect my computer to this port, I can get the ip address from the dmz_vlan dhcp pool. Because I assigned an IP address to the interface of vlan 192, then I found that one of my server "192.168.0.100" connection dropped, I cannot ping this server on the dmz VLAN, and it cannot provide the http service as usual until I remove the "interface vlan 192" from the switch. Why? However; without this command, I cannot receive the 192.168.0.0 network IP from the pool.
ip dhcp pool data_vlan1
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dns-server 8.8.8.8 4.2.2.2
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lease 7
interface vlan 10
ip address 10.10.1.254
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Sorry for the delay as I got busy with work. If your layer 3 switch is the default gateway for VLAN 192 then the default-router for the DHCP scope should be the IP address of the layer 3 switch interface (192.168.0.254). With that being said, the FW DMZ_192 interface, the switch SVI for VLAN 192 and the DMZ server should all be in the same broadcast domain, thus they should be able to reach each other.
So, can you confirm with me exactly what does not work on the server configured with VLAN 192 and a static IP? For instance,
1. Can you ping the server from the L3 switch
2. Can you ping the server from the FW
3. Can the server ping 192.168.0.1 and 192.168.0.254
4. Can the server ping the outside world? For instance, www.google.com and 4.2.2.2
5. Have you tried taking a test PC, connecting to the switchport configured for VLAN 192 and see if you get an IP address from the DHCP scope

Multiple users, network, cannot save

We've been chasing some permissions issues around for a week or so. We have several workstations on a server-less network. Each editor has a unique user on each workstation. There are a couple circumstance under which file permissions are preventing us from saving fcp projects.
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If I use Save As to create a copy of the project on the remote computer, that file cannot be opened in FCP after it has been closed. The error message here says "File Error: Wrong Type"
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Need a little more info.
How are the computers connected? How do you connect throught the network to view files from other workstations? Are all the computers identical?
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When you use a server, all of the computers have access to the raw files, (if the files are on the server...I've learned not to assume too much...) but when you have individual workstations you have to have all computers not only connected by cables (i.e.firewire) but you have to connect them through network settings, MY Network, and password in. Always connect to HD so you can choose where to get info. Of course all of this relies on the fact that you trust all of the users to not screw up the workstations they are on...
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MacG5 2.7Dual Mac OS X (10.4.6) FCP Studio, DVC Pro Deck, AJA

WLC 5508 and Multiple DHCP servers in different sites?

Hi
I work for health authority in our region and we just purchased a Cisco wlc 5508 controller along with 25 3500 AP's. We have multiple sites with different IP subnets in each, all connected by a frame relay (owned by ISP). Each site has its own DHCP server. I have the controller in our main site. So when I take an AP to a remote site, the Ap gets an DHCP address from local DHCP server (which is great) and contacts controller and joins controller. Everything is good. BUT, when a client joins at the remote site, it gets an address from a previous site which will not work because the client is now on a different subnet. We dont use Vlans as they dont transvers the frame relay. I need those clients to obtain DHCP from the local DHCP server from the site they are on. Is that possible??
I have updated the controller to latest version as well.
Thanks
Bryan Yaciuk, CCNA
Parkland Regional Health Authority

We call this as HREAP LOCAL SWITCHING!! but here is the catch.. everytime the AP joins the new site.. we need to configure the VLAN mapping and this wil do it for you!! Here is the link which will resolve ur issue..
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00807cc3b8.shtml#ll
Lemme know if this answered ur question and please dont forget to rate the usefull posts!!
Regards
Surendra

Multiple SSID network; 1 Extreme (current gen) + 3 Express (2011 models)

Hi, I'm looking to set up an Wireless network using Multiple SSID's (Business and Guest) using one airport extreme and three Airport Expresses.
Are the Airport Expresses capable of bridging multiple ssids or extending multiple ssids?
What's the best practice on setting this up?
Regards,
Mike

By default, the AirPort Extreme will provide a simultaneous dual band signal for the "main" network, with both the 2.4 GHz and 5 GHz bands using the same wireless network name. You could think of this as your Business network.
Wireless devices will connect to the 2.4 GHz or 5 GHz band based on their capabilities and distance from the AirPort Extreme.
For example, most iPhones can only connnect to 2.4 GHz, so that is where they will connect. A newer laptop will be able to connect to either 2.4 GHz or 5 GHz.
5 GHz signals are faster, but much weaker than 2.4 GHz signals, so the 5 GHz signals tend to be pretty much a line-of-sight or close proximity type of connection. In other words, if a laptop is in cloxe proximity to the AirPort Extreme, it will likely connect to the 5 GHz band. If the laptop moves a few rooms away, it will likey connect to the 2.4 GHz band.
The AirPort Extreme does have an option to enable a Guest Network......IF.....you plan to connect the AirPort Extreme to a simple modem....not a modem/router or gateway type of device.
If you are not sure what you have, post back with the make and model number of your "modem". If you do not have the right type of modem, you will not be able to configure a Guest Network.
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Each AirPort Express connects to the AirPort Extreme's signal, so each AirPort Express will need to be located where it can receive a strong wireless signal from the AirPort Extreme.
It would be better if you could connect each AirPort Express to the AirPort Extreme using a wired Ethernet connection. This would allow you to locate each AirPort Express exactly where it will be needed.

DHCP networking troubles

SO, I have configured my XServe to offer DHCP services to clients connected to the secondary (Apple supplied) ethernet card (en1). If I connect to the card directly or through a switch, I can pull down an IP address and browse the network and internet with no troubles.
My problems come in when I try to add my Cisco WAP4400N to the equation for wireless networking. I used the Gateway Setup Assistant to configure my internet sharing and DHCP on the XServe, so my internal network is 192.168.1.2-192.168.1.127 (.128-.255 are reserved for VPN services). I have the 4400N manually configured at 192.168.1.3, subnet 255.255.255.0, router and DNS set to 192.168.1.1 (the address assigned to en1 by the assistant). I can connect to the wifi network and clients show up in the DHCP clients browser, and I can browse the network and even VNC into the server to control it. I cannot, however, access the internet in this configuration.
On a whim, I hooked the 4400N directly to my modem/router, and when I do that, I can browse the internet just fine, so something is wrong with my OS X Server configuration, I just don't know where to start to diagnose this issue. Again, I can browse the internet fine when hooked with a wire to the server directly or through a switch, just not over the wifi.
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Figured it out! Re-enabled Firewall, set to 'Allow all traffic from 'any'', bingo, works like a charm!

Multiple DHCP Subnet through V lan

Dear All,
i like to request a help, i am not good in cisco anyone can explain me it will help for me.
i am trying to configure muliple dhcp subent through Valn
1. i create a dhcp server and create 3 subetnet
a. my network card ip 192.168.50.200 dhcp enabled
b . configure DHCP scope for 192.168.20.0 and 192.168.30.0
2. i have sonicwall firewall with router there i create 2 valn .
3. cisco switch sg300-28p also create valn. ( valn 20 port 3-5) (Vlan 30 port 7-10) create a trunk port for both Vlan port number 2.
i give conection from sonicwall to switch trunk port 2 and connect laptop to valn 20 port i am getting 192.168.20.0 range ip, if i connect to laptop to Vlan 30 also getting Vlan 30 range IP.( this time Sonicwall DHCP is enabled)
now come to the point, i need to relase DHCP from my server, so i disable dhcp from Sonicwall. and enable dhcp from server.
but i am not getting ip address from server to any valn.
i create a trunk port for DHCP server and connect to there. then also same problem
please help to configure the best way.

what you have to do is configure ip helper addresses on your vlans to point to the new server, it was probably pointing to your sonicwall which is why it was working on the sonicwall, but once you changed over to your server, you have to convert it over to your new dhcp server.
without port forwarding your switches/routers do not know where to send those requests, especially if they are on different vlans. thats one ceveat to running vlans and switches, it doesnt like flooding out requests to every port.
it appears to be under:
ip config - udp relay/ip helper
that section, add your new dhcp server to that and it should fix it so it sends your dhcp requests to your dhcp server.

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