DHCP Setup across multiple VLANs on RV325 - DHCP Server only working on VLAN 1

I have multiple VLAN subnets defined on my RV325 - when I try and utilize a DHCP Server on each VLAN, it only seems to be issuing IP Addresses to clients on VLAN ID 1. When I first set this up months ago, I thought I had tested it providing IP Addresses via the other subnets. Now that I am trying to do so, it isn't working "as expected". Example - I am using VLAN 25 as the GuestWireless subnet utilizing a separate 802.11n WAP that is set to Bridge connections to the IP Address of the VLAN interface. Devices are able to connect to the WAP, but end up with a self-assigned IP Address 169.x.x.x address. There has to be an easy fix to this, but I seem to be "stuck" figuring out what it is…pointers/redirects appreciated. Thanks!

Thanks - I've already reviewed that information before I posted. I've been working with DHCP since the mid-90's, so I'm comfortable with the settings/configuration I need to leverage to make this work via other means using various Network-based OSes.
I'm wondering if there are other options in configuring this device that can impact the ability to dynamically serve IP addresses on a VLAN/subnet-by-VLAN/subnet basis.
As I did more testing, I discovered when I reserved an IP Address via the IP & MAC Binding option within the DHCP Settings, those devices would receive their static reservations and work as expected, so the problem seems to be leveraging the DHCP Pool for devices connecting to VLANs other that VLAN 1.
Any ideas as to why the DHCP Pool's are "non-functioning" for the other VLANs is greatly appreciated...
Each VLAN is setup with a separate DHCP Server configuration as shown below:
VLAN ID = 1 (Default, Inter VLAN Routing = Enabled, LAN1-6 = Untagged, LAN7=Tagged, LAN8=Excluded, LAN9-14 Untagged)
Device IP Address = 172.16.xxx.1
Subnet Mask = 255.255.255.0
DHCP Mode = DHCP Server
Remote DHCP Server = 0.0.0.0
Client Lease Time = 1440 min
Range Start = 172.16.xxx.100
Range End = 172.16.xxx.199
DNS Server = Use DNS as Below
Static DNS 1 = 208.67.222.222
Static DNS 2 = 208.67.220.220
WINS Server = 0.0.0.0
Correctly serving IP Addresses via DHCP (both static and dynamic) to Wired devices & Wireless devices connecting through WAP (set to Bridge)
VLAN ID = 25 (GuestWireless, Inter VLAN Routing = Disabled, LAN1-LAN7 = Excluded, LAN8 = Untagged, LAN9-14 = Excluded)
Device IP Address = 172.16.yyy.1
Subnet Mask = 255.255.255.0
DHCP Mode = DHCP Server
Remote DHCP Server = 0.0.0.0
Client Lease Time = 1440 min
Range Start = 172.16.yyy.100
Range End = 172.16.yyy.199
DNS Server = Use DNS as Below
Static DNS 1 = 208.67.222.222
Static DNS 2 = 208.67.220.220
WINS Server = 0.0.0.0
NOT serving dynamic IP Addresses via DHCP to Wired devices & Wireless devices connecting through WAP (set to Bridge)
Static DHCP Reservations setup via IP & MAC Binding settings DO WORK in terms of providing the assigned static IP Address to the client. Inbound/Outbound traffic to Internet works for devices with Static DHCP Reservations.
VLAN ID = 100 (Voice, Inter VLAN Routing = Disabled, LAN1-6 Excluded, LAN7 = Untagged, LAN8-14 = Excluded)
Device IP Address = 192.168.zzz.1
Subnet Mask = 255.255.255.0
DHCP Mode = DHCP Server
Remote DHCP Server = 0.0.0.0
Client Lease Time = 1440 min
Range Start = 192.168.zzz.100
Range End = 192.168.zzz.199
DNS Server = Use DNS as Below
Static DNS 1 = 208.67.222.222
Static DNS 2 = 208.67.220.220
WINS Server = 0.0.0.0
NOT serving dynamic IP Addresses via DHCP to Wired devices & Wireless devices connecting through WAP set to Bridge
Static DHCP Reservations setup via IP & MAC Binding settings DO WORK in terms of providing the assigned static IP Address to the client. Inbound/Outbound traffic to Internet works for devices with Static DHCP Reservations.

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National Instruments
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Hi
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Flex Connect Across Multiple VLANS same SSID

I just need to find that if we have flex connect setup for differnet vlans using single controller, will roaming works when client connects to AP in a differnet VLAN but using same SSID.
Example below:
1) Client connects to AP on specific SSID mapped to VLAN 100, get an IP address ..all good at this point
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Why in step-2 client doesnt gets a new IP from VLAN 200 even when it shows connected to AP.

Just to add to Rasika.... L3 isn't supported....I just ran into this a few days ago.... clients should request another dhcp when roaming to another FlexConnect AP that is mapped to a different VLAN. The issue is, that some clients don't try to renew their dhcp address and gets stuck with the default 169.x.x.x. I see this with Apple devices in general and what we are going to do is get rid of the multiple vlan setup (vlan per floor) and create a bigger vlan that the SSID will be mapped to.
Thanks,
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Help out other by using the rating system and marking answered questions as "Answered"

DHCP setup help on AIR-WLC-2112 with LAP1042N

I am new to wireless. I would like to statically assign ip addresses for my controller(AIR_WLC-2112) and my access point (LAP1042N). I would then like the controller to distribute dhcp addresses for users. What is the best way in doing this?

Hi Mark,
You can certainly setup your network for 2 VLANs for different wireless networks. You will only need to setup the switchports to the WLC as trunks. In other words, the APs will simply reside in the vlan you define (access switchports) and they will tunnel all traffic back to the controller, regardless of client vlan. The WLC will then determine which vlan the traffic needs to go on.
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capwap ap ip address
capwap ap ip default-gateway
capwap ap controller ip
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Now, onto the last question regarding your WAN sites. We do have options for you there as well -- the feature we're looking at would be H-REAP. Traditionally the APs tunnel all wireless traffic back to the controller. However, in H-REAP mode, you can specify the APs to put traffic on the network right at the local switch, so it wouldn't have to get tunneled across your WAN (depending on WAN bandwidth). You still configure the AP and manage it centrally. For more information on this feature, please check out the H-REAP deployment guide:
http://www.cisco.com/en/US/products/ps10315/products_tech_note09186a0080736123.shtml
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Help. How to configure ASA5515 as 'one armed router' for access to DHCP server on a different VLAN

Hi,
My setup
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I want to put the guest WiFi users on a separate network. I have layer 2 switches and want to configure the ASA5515 as a 'router on a stick' setup for the guest vlan to have access to the DHCP server on the native vlan.
I have
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2. A static route on the ASA point the guest network to the switch.
What else do I need to configure on the ASA for inter-vlan routing?
ASA related config:
interface GigabitEthernet0/1
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security-level 100
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interface GigabitEthernet0/1.2
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no security-level
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Thanks for the quick response Reza.
Actually that command is already there. Didn't include it in my post.
So I am guessing my ASA config is correct.
I am having trouble setting up the trunk ports on the layer2 SGE2010P switch for trunk port.
I am used to command line layer3 switches (CLI is wasy) but not familiar with these switches GUI. I am going through the config guide right now.
Could you help me with that too?
Not to bother you with a completely different issue though.
Thanks again!

WLAN VLAN Primary & Secondary DHCP

HI
We've got a primary and secondary DHCP setup on all our wlan vlan.
The server with the primary DHCP died the other day, so all requests are going via the secondary.
My question is, the primary server is backup bu not running DHCP yet.
As the primary server is physically up but not running DHCP would this cause a noticeable lag for client device getting a IP address from the secondary DHCP server?
Many thanks in advance
Cheers
Craig

The secondary DNS server - which as you correctly point out does not let you add additional records to the zone is only intended to be a backup DNS server. The idea is that while the primary DNS server is broken it is 'good enough' to answer queries from clients. You are expected to fix the primary DNS server and once fixed you can continue to edit/add records to it.
The secondary DNS server is not intended to become the primary DNS server in the event the primary fails. This is different to OpenDirectory for example which does allow you to 'promote' a replica server to the master role.
An alternative approach you could consider which might let you do this, would be to setup the primary to export its DNS settings to the secondary machine. You should still initially have the secondary act as a proper secondary DNS server which as discussed means it cannot be edited or become the primary, but you could then wipe the DNS config from the secondary and restore the backup from the primary making the secondary in to the primary.
Remember you need to advertise both the IP addresses of the primary and secondary as valid DNS servers for your network (via DHCP) and for your domains.

Network setup 'DHCP with manual address' changes to 'Using DHCP'

I have setup my local network with a manual address and have observed that the setting changes without my doing to simply Using DHCP. I can't get the setup to continue using a manually assigned ip address. Even though I've saved the network settings preferences, they revert to 'Using DHCP'. Any ideas? Thanks in advance.

If you "have setup (your) local network with a manual address," does that mean you have disabled DHCP in your router? If so, then you'd want to configure "manually" in your Sys Prefs > Network.
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If the router's DHCP is enabled, many routers will allow you to set aside a subset of IP addresses to the DHCP pool, and the remainder are, by definition, reserved for static addressing. Are you assigning the computer requiring a static IPA (but using DHCP defined gateway and subnet) an address falling within the static address range of your local subnet?
If you can't partition the address space between static IP addresses and DHCP-assigned IP addresses when DHCP is enabled, are you assigning a high-numbered IP address to the computer whose Sys Prefs has DHCP with manual address?

SUN NIS Broadcast across multiple vlans

We're big sun servers and clients shop. The problem is that NIS is not able to go across multiple vlans on a layer 3 switch. I have enable the forward-udp protcol sunrpc but it still doesn't work. Is anybody else ever run into this issue?

This might help you. Use the Ip-helper adress along with the forward udp command. Look at this link under the IP- helper command. Should answer your question.
http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1835/products_command_reference_chapter09186a0080087387.html#wp1018606
If this helps please rate.

Heads Up: Private VLAN Sticky-ARP DHCP Issues

Here is the scenario:
Private VLANs are configured on a 6500 Sup720 with SVIs routing for the PVLANs.
DHCP Snooping and IP ARP Inspection are also configured for the PVLAN subnets.
A DHCP Server is offering 3 day leases.
A laptop connects to the network and receives a 3-day lease. The user leaves the office and returns 4 days later. The DHCP server offers a new lease with a different IP address. Furthermore, the previous IP address leased to the laptop has been handed out in a new lease to another host. Both systems receive their DHCP lease but have no network connectivity.
The problem occurs because, by default, PVLAN SVIs use Sticky-ARP and never age out their ARP cache. Since the laptop has a different IP address to MAC address mapping than recorded in the Sticky-ARP cache, a violation occurs and the switch prevents the new IP address from populating the ARP table on the switch.
Sticky-ARP is a security feature that prevents one system from stealing another systems IP address.
Log messages show the following:
%IP-3-STCKYARPOVR: Attempt to overwrite Sticky ARP entry
The 6500 PVLAN configuration guide Restrictions and Guidlines section suggests that Sticky-ARP is fundamental to Private-VLANs, and the only work-around for this problem is to create manual arp entries for the new IP address. This is clearly not a viable workaround for this scenario.
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/swcg/pvlans.htm#wp1090979
However, the 6500 Command Reference shows that Sticky ARP can be disabled, but makes no reference to PVLANs
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/cmdref/i1.htm#wp1091738
There appears to be two sensible solutions to this problem:
1) Disable Stick-ARP on the 6500 for the PVLANs. Since DHCP Snooping and IP ARP Inspection are configured, sticky-arp can be disabled without relaxing network security. This is assuming the 6500 will accept the command and will not break the existing PVLAN functionality.
2) Extend the DHCP lease longer, to 45 or 90 days perhaps. This will catch most transient activity and keep the IP address to MAC address relationships the same, wherever possible. The downside here is that DHCP address pools could collect stale entires that would take the lease time to flush, thus reducing the overall available IPs in the pool.
Has anyone else run into this problem? If so, what was your solution? Did you attempt either option above? I am planning on using solution #1 above, but I wanted to ping the NetPro community with this as I am sure we are not the first customer to run into this. Or are we??
Regards,
Brad

Excellent question.
Sticky-ARP is NOT intended to be a pain-in-the-butt that should disabled right away, rather, it is a security mechanism that prevents a system from stealing an active IP address on the subnet and causing a lot of problems. Sticky-ARP works best on subnets that have all static IP addressing where there is no expectation that a host would frequently change its IP address.
Yes, I would recommend keeping Sticky-ARP on subnets with all static IP addresses.
In DHCP subnets with no static IP addressing, DHCP Snooping and IP ARP Inspection provide the same security coverage that Sticky-ARP does, they prevent a system from claiming an illegitimate IP and MAC address. Furthermore, in DHCP subnets, it is reasonable to expect that a host would change its IP address from time to time when its lease expires.
Sticky-ARP does not provide any addtional securtity benefits when DHCP Snooping and IP ARP Inspection are active and it only causes problems when a lease expires.
When Cisco made Stick-ARP the default behavior for Private VLANs, they certain did not have DHCP in mind.
In Summary, it should be known as a Best Practice that when using Private VLANs on user segments with DHCP that DHCP Snooping and IP ARP Inspection should be enabled and Sticky-ARP be disabled.
Brad

Window 2008 R2 DHCP setup for /21 subnets

I have a 2008 r2 domain server that I am setting up separate client DHCP scopes. One for regular wireless network and one for the guest network. I followed the same process to create both but they both created differently when viewed in the DHCP
mgmt interface. The .40 is working, the clients grab the next available IP and they are off. The .50 is not working correctly or the same way. See detail below.
I created a Scope for the wireless network clients 10.100.40.0 /21 Range 10.100.40.1-47.254 subnet mask 255.255.248.0 The
scope created as a super scope and added scopes .40 .41 .42 .43 .44 .45 .46 .47 (all as separate scopes under the super scope) for distribution which is accurate according to the subnet calculator. I excluded 40.1-10. It works! clients fill up
.40 and move to .41 etc. Statistics total scopes 8, total addresses 2023, in use 874, available 1149.
I created a scope for the guest wireless network clients 10.100.50.0 /21 same way! Range 10.100.48.1-55.254 (according to the subnet calculator)
subnet mask 255.255.248.0 The scope created as a regular scope 10.100.48.0 /21 starting address assigned is in the 48 subnet. I excluded 10.100.50.1-10. Statistics total scopes listed none ( no line), total addresses 2036, in use 262, available
1774.
I would prefer they both be set up the same way and functioning. As I said earlier .40 is working great! but .50 seems to have some .48 clients, 3 49 clients and a small group for 50 starting from the exclusion. I am not sure it is working
correctly ... I have had several people tell me that they are not able to grab an IP on the guest network. I have tried to recreate several time with out any different results.
Anyone have any ideas why .50 is different and what I could do to fix this? Thanks! chabo
chabt

Hi chabt,
Based on your description, I suppose that when you use
New Scope Wizard to create the super scope, you choose 24 in the
Length edit of Configuration settings that propagate to DHCP Client, that is to say, the subnet mask is 255.255.255.0. Then the New Scope Wizard will prompt you create a superscope because the address range you specified is
too large for a single scope. If the subnet mask is 255.255.248.0, it won’t prompt you create a superscope.
About the Statistics displaying, please try to restart DHCP server to see if it can display normally.
About the problem that several users couldn’t obtain an IP address, because other users can get IP addresses, please check if they match the policies on your guest network.
Also, please check the DHCP logs to see if the DHCP server logged any related logs. Such as, you could find if the lease was denied, or if the DHCP server received the DHCP request or other useful information.
The dhcp logs are stored in %windir%\System32\dhcp. Please ensure that the DHCP server enabled audit logging.
To enable DHCP audit logging, in the DHCP console, right click
IPv4, click Properties, in the General tab, check “Enable DHCP audit logging” checkbox.
For more details about DHCP audit logging, please refer to the article below,
More About DHCP Audit and Event Logging
http://technet.microsoft.com/en-us/library/dd759178.aspx
Best Regards,
Tinac

Can I use my WRT54G as a DHCP server only? I've got 5 dynamic IP's from Time Warner..

Hi everyone, I'm wondering if I can use my WRT54G as a DHCP server only only my network, without having to have any of my PC's plugged into it's router ports? I looked at the settings but I couldn't get it to work.
Here's why: I just got Time Warner Business Class cable internet which comes with 5 dynamic IP's. I want each computer, well 4 of them at least and 1 for the WRT54G, to have a unique IP when accessing the internet, and the other computers (5 more computers) to use the DHCP server in the WRT54G to get a NAT IP for use on the internet.
We play Diablo II on the internet and only 4 computers can be connected through 1 IP, so that limits us in my current configuration.
Current Equipment: One WRT54G, one Netgear GS116 16 port gigabit non-managed switch. One Time Warner Cable modem. Also attached to the network is one HP network printer, a Buffalo LinkStation NAS and a Zensonic Network DVD player.
Current config: Cable modem --> WRT54G --> Netgear switch.
Ideal config: Cable modem --> Netgear switch --> WRT54G.
With my current config, I am not taking advantage of the 5 dynamic IP's, but all the computers connected to the Netgear switch or the WRT54G can connect to the internet and the NAS.
So my ideal config (where I don't have to buy anything and where all the computers can print and access the NAS) is to connect all the computers and devices to the Netgear Switch and somehow force 4 of the computers and the WRT54G to get a dynamic IP from the cable modem, while the other computers and devices use the DHCP server on the WRT54G to get to the internet.
Is this possible?
I called Time Warner Cable and they weren't any help. I called the Linksys sales department and they weren't of much help either.
I suppose that I could purchase a new 8 port switch and attach 4 computers, the cable modem and the WRT54G to it. Then attach the Netgear to the WRT54G to accomodate the printer, NAS, and the other 5 computers. But in that senario, the 4 computers connected to the new switch can't print and can't reach the NAS. And geez, some computers would have to go through 3 devices to reach the internet, which has got to slow them down.
I did read about the Linksys EFG120 which has a DHCP server, but at $400 and only 120 gigs, it doesn't work for me.
I called Time Warner and the cost of more dynamic IP's is prohibitive, I'm already paying $79 a month for this internet and they want another $50 a month for 7 more dynamic IP's and that wouldn't help my NAS or my printer.
The cost of a 16 port gigabit switch with DHCP is an amazing $800 or so, which is out of the question.
Sorry for being so long winded and thanks for reading this far. I'm looking forward to any replies.

That is a hell of a setup. I don't know if it would be easier and cheaper to either buy a real router like a Cisco, get fixed IP addresses and a RV042, or buy 4 network cards for the four of the five computers which need the internet access for gaming.
O.K. First your setup:
1. You wire the modem to the 6-port switch.
2. You connect the remaining 5 ports with the WAN ports of 5 WRTs with DHCP on the WAN interface.
3. You configure each WRT with unique LAN IP addresses in the same subnet, e.g. 192.168.1.1/255.255.255.0, 192.168.1.2, 192.168.1.3, 192.168.1.4, 192.168.1.5.
4. You turn off all DHCP servers except on one, e.g. 192.168.1.1. That router will be the default router and internet connection for any client which gets dynamic LAN addresses (as fallback or guests, I would not configure the NAS or printer with DHCP addresses if you have everything else on static IP addresses). You can certainly disable all DHCP servers if you want, too.
5. Now you connect all WRTs with each other.
5a. You connect port 1 of the 1st WRT with port 1 of the 2nd.
You connect port 2 of the 2nd with port 1 of the 3rd.
Port 2 of the 3rd with port 1 of the 4th.
Port 2 of the 4th with port 1 of the 5th.
(Do not create a loop connecting port 2 of the 5th with port 2 of the 1st!!)
5b. You buy another switch and connect each port 1 of each router with this switch. This has the advantage that you don't have a long cascade between the 1st and the 5th router like in 5a.
6. You connect all devices to the LAN.
6a. If you did 5a, you will probably put each computer to the router which internet connection it uses. The NAS and printer could go anywhere.
6b. If you did 5b, you hopefully bought a 16 or 24 port switch. Then you plug simply everything into that switch. Otherwise you can certainly use the free ports of the WRTs like in 6a.
7. You configure all your devices with static IP addresses. For instance,
IP 192.168.1.11
netmask 255.255.255.0
gateway 192.168.1.1
For the DNS servers I would highly recommend to use the DNS servers of your ISP directly and not use the relay on 192.168.1.1.
The gateway address defines through which router the computer connects to the internet.
8. You may still have to configure port forwardings on the router to the game computer if required for the game.
An interesting alternative to this setup might be to buy 4/5 network cards for the 4/5 computers with direct internet access. Then you use the one network card to connect to your single LAN behind your single WRT. The other network card goes into the switch behind the modem and has direct internet access. You then have to tell Windows which of the network cards has the default gateway for the internet connection (to prevent routing all traffic through the LAN and the WRT to the internet). One game computer would have to be behind the WRT.

Does lion server support a single email address across multiple devices??

I am looking to move from an outdated Microsoft Exchange Server 2003 to OS X Lion Server but I am unsure as to how Lion will handle email. I do not want to spend money on a new windows server if I can get a Mac Mini Server to do the job. I am a very small business with a number of email accounts for a couple employees and need access to email and calendar from both the office iMac's and my Macbook Pro when on the road. My IT guy says I need Exchange but he's been off base on a few other items recently and I wanted to check with other sources.
I have 2 new iMac's, a MacBook Pro, an iPad1 and and iPhone4 on the mac side of things and 2 windows computers running XP. I would get rid of the windows computers completely if not for my CAD program which runs best not in a virtual machine mode.
How well will email and calendar entries sync across devices?

I have a very similar setup at my office. Lion Server will push email, calandar, contacts to all of your apple product with out a hitch.
As far the Windows XP machines, you can access email over IMAP with Thunderbird, and calandars via sunbird or the built in web app.
I would ditch the exchange server move to Mac OS X Server, and never look back.
God Luck!
PS. All of your devices will be in sync all the time.
Shore answer:
Does lion server support a single email address across multiple devices??
Yes.

Spreading user data across multiple HD's?

I hope this is the right forum for this. I'm on a Mac Pro 1,1 and recently installed a few extra hard drives to optimize performance for video editing (accoring to recommendations over at another big software company's support docs -- this is not about FCP).
My goal is to have this general set-up:
SSD: Boot Drive (OS & Apps) -- already set up
Disk 2: Editing Project Files, media and exports
Disk 3: Cache, renders and previews
Disk 4: Ideally this would be for docs, itunes, photos and anythings non video related.
The thing is, this advice comes from PC users mainly and the OSX User Folder structure isn't an issue.
Question: Can the same user folder's contents be spread across multiple HD's? I realize I'll need to physically place a different "house" icon folder in each HD, probably, but can those have different contents? How can I make them all boot on start-up so the disk allocation is pretty much not noticeable?
Thanks!

A simple version of what you are trying is to establish a Boot Drive, with only System, Library, Applications, and the hidden unix files. All user files are moved off to a different drive.
Here are some simple recipes for Moving the "Home" folder"
Japamac's Blog: Make space for Performance -- Moving the Home Folder
http://chris.pirillo.com/how-to-move-the-home-folder-in-os-x-and-why/
You can embellish this basic setup any way you wish, especially putting Movie data on a different drive, and Movie cache data on yet another drive.

Syncing model sources across multiple WARs

One of the problems we're hitting in our development is keeping model classes synced across a multi-WAR project. For example, the model class for, say, a User object was changed in WAR B, but that developer (an intern) did not publish those changes to WARs A and C. The end result was that a few of our web service calls started failing on the unchanged WARs, while others worked fine.
I started looking into EJB3, intrigued by the @Remote and @Local setup, but those are related to the session beans themselves. I was hoping that object models could be referenced by interface across multiple WAR distributions as well, though I haven't dug up anything specific on this yet.
Is there any advice on this forum for keeping model classes in sync across a multiple-WAR project (aside from tighter repository control and swift kicks to the butt)?

Wraithe wrote:
Quoting myself: +"The end result was that a few of our web service calls started failing on the unchanged WARs"+
My original question pertaining to ensuring that the source code for the end user model classes remained consistent. You can't if the interface contains Java classes that are changed. You immediately have to deploy updated JAR files with the new code to all the clients that need it.
The JAR idea is applicable, though not ideal, and I was hoping there was some other suggestion as to how to handle client-side objects.There is: XML messaging in the service interface instead of Java classes.
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