6500 DHCP ISSUE

Hello All,
I am having an issue do DHCP from the 6500, and was hoping someone cant help. So, I tried to setup DHCP from the FWSM to the clients and this worked fine with giving out the IP, however the gateway for devices on the inside is supposed to be the 6500, not the FWSM, which is why the clinets wouldn't get out to the internet. Do I need to set up DHCP relay on the FWSM or does anyone know the way I can setup DHCP on the 6500 to give out IP's to the clients. Again just to reiterate, when I setup DHCP on the FWSM the clinets get the IP's but do not get out to the internet and when I setup DHCP on the 6500 the clients do not get an IP. Also I know tghis is a dhcp issue becasue when I assign a static address on the network the clients get out fine. Thanks in advance for the help!
6500 Config
ip dhcp pool TEST
   network 1.1.1.0 255.255.255.0
   default-router 1.1.1.1
   dns-server x.x.x.x y.y.y.y
FWSM Config
FWSM/TEST# show run
interface Vlan3
nameif outside9
bridge-group 1
security-level 0
interface Vlan203
nameif inside9
bridge-group 1
security-level 100
interface BVI1
ip address 1.1.1.4 255.255.255.0
passwd 2KFQnbNIdI.2KYOU encrypted
access-list INSIDE1_IN extended permit ip any any
global (outside1) 1 x.x.x.x
nat (inside1) 1 1.1.1.0 255.255.255.0
access-group INSIDE1_IN in interface inside1
route outside1 0.0.0.0 0.0.0.0 1.1.1.1 1
FWSM/TEST#

Hello Alain,
Thanks for your quick response. I attached a Diagram of the layout. Just to let you know this is an FWSM with many virtual contexts and most including this one that are Transparent. I understand that I need an access-list on both ends to specifiy so the FWSM opens it, I am just having issue because the FWSM sees this as unsual traffic and the access-list needs to be on-point to work. Thank you for the response and I'll look forward to hearing back from you.

Similar Messages

VRF and DHCP issue

VRF and DHCP issue
We have a 6500 ( 12.2 (33) SXH5 ) that has a VRF running for our guest network. On this 6500 resides the DHCP pool with a range defined for our guest network. We have a stack of 3750's (12.2 (46) SE) connected to the 6500 with a L3 connection. The 3750's have a local guest VLAN with its gateway defined in a VLAN interface. This VLAN on the 3750 has an IP helper address pointing to an IP within the VRF on the 6500. When debugging DHCP on the 6500, a request is received and sent back out. The client never receives this request.
If a static IP is applied, the client is able to communicate anywhere within the VRF successfully (including pinging the IP within the helper-address. As many posts have pointed out - there is no VRF <name> under the ip dhcp pool <name> within the 6500. I am just wondering if anyone else has run into this and what their solution was.
Thanks.

Hi,
I have tested the dhcp server and vrf on Cisco 3640 and it is working without VRF under the ip dhcp pool. Please ensure that you have configured routing for the dhcp-relay agent(VLAN facing dhcp client on 3750 in your case).

Wierd DHCP Issue

Hello All,
I facing a very wierd DHCP issue and would like to know your thoughts on it.
I have my wired clients on vlan 1 and wireless cleints(eap-peap) on VLAN 2.
We are facing an issue where multiple wired clients who were on access port vlan 1 are receiving IP address from wireless subnet(vlan2) -their DHCP server was the WLC virtual gateway IP address(1.1.1.1). This is causing an outage to few wired clients.
The WLC trunk does not have vlan 1 allowed on its ports and all APs are in local mode and all on access vlan.
I'm not entirely sure whats causing this, but only way I think this is possible is that 'A Client' laptop has his network connections bridged - his wired nic on VLAN 1 and wireless NIC on vlan 2, acting like a WGB, which is causing new wired clients(vlan1) DHCP broadcast request forwared through the bidge mode laptop to AP--> WLC. Do you think this is possible??
Havent been able to identify which client is causing this issue yet.
Has anyone faced a similar issue and anyway to block this through WLC/ACS policy?
Thanks
Jino

Hi,
Might we consider to make use of network monitor to take a look at the traffics for the 1.1.1.1 address?
How to use Network Monitor to capture network traffic
Download link here:
Microsoft Network Monitor 3.4
Best regards
Michael Shao
TechNet Community Support

Very weird dhcp issue

We've started 're-vlanning' our main location here, breaking up depts
into their own vlans.
All seems ok so far, aside from a real doozy.
For the IT vlan, we have one address that will not talk to our web
content mgmt appliance. It's the 2nd address in our assignable pool,
and it doesn't matter if it's dhcp or statically assigned, that address
will not talk to that device.
That is the *only* device that cannot be reached from this particular
address in our dept vlan, every other one works fine.
Any ideas on this?
Stevo

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
> and it doesn't matter if it's dhcp or statically assigned, that
> address
So.... the title of this thread should actually be 'Very weird non-DHCP
issue', since your own testing confirms this has nothing to do with DHCP?
If you do a LAN trace on this machine as well as your web content
management appliance do you see packets on either side? Both sides? If
not on both sides but you do on the source (workstation) side see
packets going out, then get LAN traces after each network device
(switch, router, firewall, etc.) to see when the packets disappear.
Feel free to post the LAN traces somewhere with descriptions of IPs,
ports, and what you should be seeing, if you want to post them somewhere
for review.
Good luck.
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Version: GnuPG v2.0.18 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
iQIcBAEBAgAGBQJP4jFPAAoJEF+XTK08PnB55aMP/3Rg9u6LX6jFCXGYuex/oXdS
NZ/liqfCgjyIcykWWeKGgdtm2I7JZOcFiG8YW2le55mcltvCL1VJW +1VGng4kZER
0f4hjfyQ3CcQ6HIU3RM6VL5U2Pblb80MsEQe0qo0xgtPXipmjs i7Q0xIv9p0wT7A
7JMkfgM9tfuI5Yro+BDLfSIkFWicKuKs1sKpNugKalPuyyRrzW IiznoalIKFshon
a40ETLJVZmngBYfqfeZL9nPNsFlveFNXrDkdbl2WbaprsHtNnA NwZfVUIlc5kOCT
MknY0GXof4/tk149OVCCLgjEzoRtTIZH0BJTHQwW7ANkWUUNYwi49+Mk46V0o awl
oe1aA+NK9gl2bWXWLCtTro4ERSVMvkcI0OffytrfcBsqdCKg/g3QPMjV3kiVEULI
xnSTsqFgOl2qO8qGaL6FJtk39ZBnCwqDPtmoNt93OK4hAhWBuA Xihc+kiQHrwkpO
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j8fezki9PMznkcT+of2Oe4T99K9fChN2WFSgUKdlpkYSjbkmjP fdbWloou+WBjCm
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WLC DHCP issue with 6500

Hi,
I configured WLC as DHCP server and is working fine when connected to 3750 core switch. The AP's and clients are getting IP address.
When the same WLC is connected to 6500 , the DHCP is not working from WLC . The same port of 6500 switch is verified by connecting a 3750 switch as dhcp server and AP as well as clients are getting IP.
DHCP snooping and port security is not enabled in the 6500 and the configuration is simple. The WLC is untagged and the 6500 port is a trunk port with 242 as native VLAN.
Please help

Dear Surendra,
Please see the answers in line.
1.As per your previous post, if we connect WLC to 3750 core everything works fine.. so in this case, i assume that we have INTERFACE VLAN on the switch and then the management interafce on the WLC are in the same subnet?? correct??
"Yes , All are in the same Vlan . Interface VLAN and management interface are in same subnet."
2. Similarly, if we swap the 3750 with 6500, it doesnt work.. in this case.. have you created the interface vlan on the 6500 in the same subnet as that of management interface of the WLC??
" Yes, the 6500 has vlan interface without IP. The same way we configured 3750 "
Or
3.are we not swapping the 6500 and we are connecting the WLC to the WLC to the 6500 and then this 6500 to the 3750??
"We connected WLC LAP to 3750 and the dhcp of wlc is working fine.. When WLC & AP connected to 6500 , the WLC DHCP is not working. We verified the 6500 port by coonecting 3750 as DHCP server and WLC is connected to 3750 and all were working fine. When WLC is directly connected to 6500 , the LAP is not joing to WLC. When static IP is given to LAP, the LAP joined WLC but the clients were not getting IP."
4.Layer 2 means... interface VLAN on the switch and the WLC management and the AP DHCP pool are all in the same subnet. correct?
"Yes all are in the same subnet"
Thanks for your efforts.
Regards,
Savad

Wireless dhcp issue after upgrading WLC to 7.6.100

Hi All,
We have upgraded our controllers to version 7.6.100. After upgrading, the access points also upgraded their version to 15.2(4)JB3. But, the problem is that after this process the APs do not get IP. It stays on this state:
*Sep 26 03:55:36.334: %CAPWAP-3-DHCP_RENEW: Could not discover WLC using DHCP IP. Renewing DHCP IP.
Not in Bound state.
The DCHP configuration is OK, since it is working in other two controllers we have and that we are not upgrading untill this issue is solved.
If we connect the APs via console and configure a static IP and controller's IP, the AP registers and works fine. But, the access points are located in 20 remote sites, so we would like to avoid going site by site.
Has anyone suffered this issue and knows how to "recover" those access points?
Thank you very mucho for your help!

Hi,
Thank you for your answer conraddaniel.
But, our issue was an error on the DHCP. The DHCP server pool for the APs was configured with lease time infinite (on a Cisco 6500). After capturing the packets and debugging on the AP we realized that the AP were receiving wrong values:
DHCP: Scan: Renewal time: 2147483647
DHCP: Scan: Rebind time: 536870911
So, on the AP debugging we saw:
DHCP: Scan: Renewal time larger than Rebind time
On Cisco documentation:
T1 Timer(Renewal) After a certain portion of the lease time has expired, you attempt to contact the server that initially granted the lease in order to renew the lease so its IP address can still be used.
T2 Timer(Rebinding) If renewal with the original leasing server fails, because, for example, the server was taken offline, then you ideally try to rebind to any active DHCP server and try to extend its current lease with any server that allows it to do so.
These T1 and T2 timers can be any values, but must be less than the IP address lease duration. T1 Timer must be less than T2. Generally T1 is set to 50 percent of the lease duration and T2 is set to 87.5 percent of the lease duration. Use this rule to set T1 and T2 timers.
On the previous version of the WLC, the DHCP was configured in the same way and we confirmed that the APs received same times, but they ignored those wrong values.
The workaround was to modify the lease time of the DHCP pool (1 day). This way, both timers had valid values and the APs accepted the DHCP OFFER. We still do not know why with lease infinite these timers have wrong values (a bug?).

DNS / DHCP Issues in Server 2008R2 Domain

Hi folks,
We’ve been having an ongoing issue for a while now in that some PCs and laptops (Win 7) in our company can’t be contacted by hostname i.e. if we try and RDP from one Windows 7 PC to another the RDP session fails as if the PC isn’t turned on, but it
is indeed turned on and connected to the network.
Even if we ping the host name of a particular computer that is on it fails to reply but if I go into DHCP I can find the hostname bit it has a different IP address assigned to it other than what is listed in DNS for that host name.
So for some reason when some computers get switched on and be allocated a new dynamic IP address through DHCP the corresponding record in DNS doesn’t seem to get updated meaning we need to go into DNS and manually amend the Host A record with the new
IP address that it has been given so we can RDP onto that computer using the hostname.
At present aging and scavenging isn’t enabled in our environment as we are afraid to in case it removes live DNS entries that just haven’t been turned on in a wee while. Does aging and scavenging just ignore static DNS entires and does aging and
scavenging work in DHCP as well?
One other thing I noticed is that if I delete an incorrect DNS Host A record and create it manually and assign the hostname and the correct IP address it says static rather than having a timestamp on it. When I create the new record I always click on our
domain in the Forward Lookup Zone and on creation I always select Create the associated pointer (PTR) record so not sure why the manual record doesn’t get a time stand.
So any help/advice or suggestions would be greatly appreciated.
Thanks,
Bonemister

Hi David,
Thanks for your reply and for clarifying those things for me. Unfortunately in my workplace when I add a manual DNS Host A record it does become a static entry and doesn't have the '0'
you mention, do you have any idea why that would be as I'm worried about it affecting things if I were to enable aging and scavenging.
Is it possible to just enable aging and have it remove entries before a time of my choosing or does scavenging need to be enabled also?
I still can't understand why the relationship between DHCP and DNS isn't working correctly. Sure if DNS has an A record for a computer and the IP address changes via DHCP there is bound to be
a way to setup DNS to be able to update the records it holds - do you know if my reading of this is correct.
By the way, I can confirm that my adapters TCP/IP DNS settings are the same on of the PCs that had the DNS fault as in your screenshot the only different is we have the tick in Append parent suffixes... - would that make a difference.
Thanks also for that other link, it seems very interesting and I'll have a good read through it carefully before doing anything!!
Thanks again for you reply and I look forward to seeing any responses.
Regards,
Bonemister

Mac osx 10.9.4 HP office jet 6500 scanner issues

My HP 6500 scans but at preview it say no document loaded even though I can see the document.
I tried deleting the printer/scan and reinstalling it and downloading the HP driver and it still does the same thing.
HELP!
Thanks
Cher

Hi @cher-1
Does the printer say no document loaded or does the software? Does this happen when you copy too?
Which officejet 6500 do you have?
5 matches found.
HP Officejet 6500A e-All-in-One Printer series - E710
HP Officejet 6500A e-All-in-One Printer - E710a
HP Officejet 6500A Plus e-All-in-One Printer - E710n
HP Officejet 6500 All-in-One Printer series - E709
HP Officejet 6500 All-in-One Printer - E709a
HP Officejet 6500 Wireless All-in-One Printer - E709n
HP Officejet 6500 Wireless All-in-One Printer - E709q
I look forward to hearing from you, and working towards a solution.
Please click the Thumbs up icon below to thank me for responding.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
Sunshyn2005 - I work on behalf of HP

[Solved] Several installs and issues with DHCP issue every time.

Edited: more concise information!
Hi folks,
I was using Arch fine for months but decided to reinstall it fresh at the new year, but since then I have been plagued by connection issues. I install Arch and follow many of the tips found in these Wikis to set it up how I like then install preload and readahead.
Post-Installation Tips
http://wiki.archlinux.org/index.php/Pos … ation_Tips
- LCD filtered fonts
- Disable IPv6 (I use Chorus/NTL and they have a tip for improving Firefox that disables IPv6, so I think that this is not to blame)
Laptop
http://wiki.archlinux.org/index.php/Laptop
- Battery state monitoring utilities (acpi)
- Laptop-mode-toold
- Powernowd
Maximising Performance
http://wiki.archlinux.org/index.php/Max … erformance
- Swapiness
- Mount /tmp to RAM
My internet connection works fine, even when rebooting, but later I turn on my computer and WICD or networkmanager fails on "obtaining IP address. I really think that there is something in one of these tips that is causing this problem, but I am at a loss as to what. Like I say, I was using it happily for many months before these current issues. The only thing I did differently was systematically set up my computer with all the tips detailed above, where as before, I collected these tips over a period of time and did not do them all straight after installation. I have tried rolling back the changes and this has not fixed the issue.
I have had this issue over many reinstalls, using networkmanager or WICD and each time I was hoping that I was doing something wrong. I have an Ubuntu and work Windows laptop that both work fine, so I don.t think it is anything to do with the connection itself.
I am not sure what information you would need so I thought I would post both of these files. If you would like anything else, give me a shout and i can post it.
# /etc/rc.conf - Main Configuration for Arch Linux
# LOCALIZATION
# LOCALE: available languages can be listed with the 'locale -a' command
# HARDWARECLOCK: set to "UTC" or "localtime", any other value will result
# in the hardware clock being left untouched (useful for virtualization)
# TIMEZONE: timezones are found in /usr/share/zoneinfo
# KEYMAP: keymaps are found in /usr/share/kbd/keymaps
# CONSOLEFONT: found in /usr/share/kbd/consolefonts (only needed for non-US)
# CONSOLEMAP: found in /usr/share/kbd/consoletrans
# USECOLOR: use ANSI color sequences in startup messages
LOCALE="en_GB.UTF-8"
HARDWARECLOCK="UTC"
TIMEZONE="Europe/Dublin"
KEYMAP="uk"
CONSOLEFONT=
CONSOLEMAP=
USECOLOR="yes"
# HARDWARE
# MOD_AUTOLOAD: Allow autoloading of modules at boot and when needed
# MOD_BLACKLIST: Prevent udev from loading these modules
# MODULES: Modules to load at boot-up. Prefix with a ! to blacklist.
# NOTE: Use of 'MOD_BLACKLIST' is deprecated. Please use ! in the MODULES array.
MOD_AUTOLOAD="yes"
#MOD_BLACKLIST=() #deprecated
MODULES=(acpi-cpufreq vboxdrv coretemp)
# Scan for LVM volume groups at startup, required if you use LVM
USELVM="no"
# NETWORKING
# HOSTNAME: Hostname of machine. Should also be put in /etc/hosts
HOSTNAME="laptop"
# Use 'ifconfig -a' or 'ls /sys/class/net/' to see all available interfaces.
# Interfaces to start at boot-up (in this order)
# Declare each interface then list in INTERFACES
# - prefix an entry in INTERFACES with a ! to disable it
# - no hyphens in your interface names - Bash doesn't like it
# DHCP: Set your interface to "dhcp" (eth0="dhcp")
# Wireless: See network profiles below
#Static IP example
#eth0="dhcp"
eth0="dhcp"
INTERFACES=(eth0)
# Routes to start at boot-up (in this order)
# Declare each route then list in ROUTES
# - prefix an entry in ROUTES with a ! to disable it
gateway="default gw 192.168.0.1"
ROUTES=(!gateway)
# Enable these network profiles at boot-up. These are only useful
# if you happen to need multiple network configurations (ie, laptop users)
# - set to 'menu' to present a menu during boot-up (dialog package required)
# - prefix an entry with a ! to disable it
# Network profiles are found in /etc/network.d
# This now requires the netcfg package
#NETWORKS=(main)
# DAEMONS
# Daemons to start at boot-up (in this order)
# - prefix a daemon with a ! to disable it
# - prefix a daemon with a @ to start it up in the background
DAEMONS=(preload syslog-ng hal wicd @powernowd @laptop-mode @fam @alsa @sensors @readahead-list)
/etc/resolv.conf
# Generated by dhcpcd
# /etc/resolv.conf.head can replace this line
# /etc/resolv.conf.tail can replace this line
Thanks for your help,
Scott
Last edited by ScottArch (2010-02-14 12:30:25)

Hey Scott!
I don't know if it is helpful in any way but I have a similar problem with my desktop PC.
I have two ethernet controllers installed and somtimes I had a Ip address assigned and sometimes I didn't.
One which is connected to the router and a 2nd one I use sporadically to connect additional computers.
The dhcpcd would fail to load even if I followed steps suggested from other forum members.
My temporary fix was to run:
# dhcpcd
manually.
If this helps you might consider adding "dhcpcd" at the end of
/etc/rc.d/network
I know it's not really a fix but it helps me to get a working connection whoch otherwise would fail - or work if lucky but i don't like lucky with network/internet ^^

2100 wireless LAN controller intermittant DHCP issue does not respond to clients

Hi everyone,
I have been struggling with a difficult problem for some time now:
The cisco 2100 wlan controller I have is configured with a dhcp scope in the same ip address range as its WLAN. The configuration works and on a good day I have up to 200 clients connecting with out issue. In the web interface they display as associated and authenticated
On a bad day I find I will begin seeing about 50-80% of all new devices that attempt to join the WLAN show up as associated but not authenticated. These clients end up self assigning themselves a 169.254.0.0/16 (APIPA) address
When my controller / WLAN enters into this state: if clients leave the WLAN they typically fail to get back on and successfully authenticate. By the end of a day around 80-90% of all devices are essentially without Internet access due to this issue.
Rebooting the controller and or APs typically makes no difference or makes things worse – although sometimes it appears to resolve the issue. The same holds for disabling the entire wlan for about 10 minutes and then re enabling it.
Im using 1130 cisco aironet APs with the controller. I have checked extensively for interference and congestion – I think I have congestion – some APs typically host 40 to 90 devices. However as mentioned on a good day the wlan will host 200 devices all day without any issue and some APs will host 50 to 70 devices without major issue.
I can provide more specifics if anyone should need – eg firmware, IP addresses, exact model numbers etc.
Please let me know if anyone has seen something like this before ?
I believe the 2100 is rated to handle up to 350 devices and its recommended not to load a 1130 AP with more than 25 devices ??
Regards
Matthew

Hi Amijad, Hi George:
Thank you both for your time in considering my situation.
I will think about implementing an independant DHCP server; im really wondering if the equipment is just overloaded
- What software versoin the WLC uses?
Product Version.................................. 6.0.199.4
RTOS Version..................................... 6.0.199.4
Bootloader Version............................... 4.0.191.0
Emergency Image Version.......................... 6.0.199.4
PID: AIR-WLC2106-K9, VID: V05
- What ports of the WLC are connected to the neighbor swtich? one or more?
2 ports connect to the neighbor switch on separate vlans
- port 1 is vlan 0 and hosts the management and ap-management IPs for the wlan controller
- port 2 is vlan 1 and hosts the wlan
- the controller has one dhcp scope defined on port 2 for the WLAN
- What is the security of your WLAN?
WPA+WPA2
AES
PSK
- Do you have "DHCP required" enabled on the WLAN?
yes DHCP required is enabled in the WLAN
please let me know if you have any additional advice.
regards
Matthew

AP 1140 DHCP Issue

Hi All
I am installing a 3750 switch with integrated controller and 12 x Cisco 1140 AP's. I have configured the 3750 WLC with a management and AP Manager IP address along with 3 WLAN profiles and security settings. I am confident that these are correct, and in any case are, I believe, not related to the problem I have.
None of my AP's would connect to the controller and when I checked the DHCP (Windows Server) server they had not been issued with an IP address. I logged into an AP via the console and saw the following message "Not sending discovery request AP does not have an ip" If I plug a laptop into the port the AP connects to I pick up an IP address without a problem from the DHCP server. This is not a faulty AP issue as none of the AP's are getting an IP address.
The only other relevant fact is that the Windows DHCP server is on a different subnet (VLAN)though I have enabled DHCP forwarding which obviously works as my laptop gets an IP address.
I have raised this with Cisco TAC and their first response has been to get me to configure Option 43. I will try this but am not expecting it to work as the only thing this will do is to return the IP address of the controller. My AP's however are not getting any response.
Any suggestions as to how to resolve would be gratefully received.

Wouldn't option 43 only work when the AP's are actually getting an IP address?
Could you post an extended capture of the AP output during the boot and lack of join?
To make sure you connectivity is what it should be, you could always try manually assigning an IP address to the AP, and also manually tell the AP the controller IP address. If that works, then you likely have a problem with your DHCP server or scope definition. Do you have any MAC assignments/reservations in the DHCP scope? Have you tried reserving the AP IP addresses by MAC address within the relevant DHCP scope?

6500 slide issues (list it here)

I hope to create a single thread to list and discuss all issues users are having with their 6500 slide.
Let me start with mine:
V 0.380
10-09-07
RM-240
Variant: 255.02
1. sometimes the buttons (numbers or options) becomes unrepsonsive; give it a wait and it works again.
2. Ringtone and Message Alert tone goes back to default; or display some weird alphabet+numbers after a while. And i had to manually set back my favourite ringtone for both calls and message. This happens to the default 'General' and renaming MyStyle1.
3. do you find the battery lasting? not for me.

I got my 6500 slide 3 days ago and I have the same firmware version as you - as well as some of the same problems.
The screen/buttons hang, and I have to wait or press the end button repeatedly to get back to the main screen and start all over again. A few times I had to repeatedly push the unlock + * buttons to unlock the phone. I also have problems viewing my contact info in the PC Suite...
And I have scratches on the "2" key on the number pad. Is this just "wear" or is it a defect, as I see this problem reported by many others. I'd like to know so that I don't look like I have OCD when I go to the store for an exchange.

DHCP issues on wireless

When I connect to my wireless router (D-Link WBR-2310 I believe) using my mac, it gets the default self-assigned address instead of DHCP-assigned address. My PC connects fine wirelessly and wired over ethernet. If the router is reset, it works fine. If I assign manual address to iBook wireless, it works fine (by "works fine" I mean that I can connect to the internet).
Had similar problem with my old Linksys router (Linksys WRT54G) where the following devices had issues connecting to the internet iPod Touch, iBook, PowerBook, and MacBook. This was under unsecured, WEP and WPA settings.It seems that the issue is resurfacing with my current router.
Currently, I am using WPA security (I don't like WEP and neither does my PC). I would rather not switch security settings to unsecured due to the close proximity of my neighbours (yes it's canadian spelling!).
Any suggestions?

I have encountered this same router and issue visiting my future in-laws for the holidays. DHCP with manual address appears to work, but I also still encounter occasional drops. The router is setup for WPA2 security, and support a mix of Mac and Win clients. I haven't put a lot of time into trying to fix it, but here is what I know so far:
1) Sometimes it does just work with DHCP
2) DHCP with manual address works, but will still drop occasionally for brief periods
3) Sometimes, just turning the airport off then on again will resolve the issue and pull an address
4) Just waiting about 30-60 seconds also seems to work -- usually
5) Plugging into the wire works great!
I haven't sat by the router and worked on this, but it seems that occasionally the router just drops the signal, and with it the DHCP assignments. Something about the DHCP implementation is very slow, and it just take a while to get around to assigning an address to my machine. I haven't looked into firmware updates since it's not my box and I don't want to mess it up further and then leave, but that's certainly something to check into.
We also have an 12" PB that cannot even connect to the wireless with the "Error joining wireless network" message. Haven't been able to figure that one out at all.
They may just be getting an Airport or Linksys as a late x-mas gift here... (as my connection drops again while I type this! Airport off, airport on, wait 30 sec, and we're back)
Cheers, and good luck!

Using X3500 as a Wireless Extender DHCP issue iPhone 6

Hi
Hopefully a simple question with a simple answer.
Background:
I've transitioned away from my ADSL ISP to a cable provider (VirginMedia). My new ISP comes with a cable modem (SuperHub 2 ac) and I've connected the two devices together to extend my home wireless network. The cable modem is The two routers are physically remote from each other - connected via just their Ethernet ports - via power-line technology (Devolo dLAN 1200+). The two routers have the same broadcast SSID albeit on separate channels.
Issue:
All devices in my house, laptops tablets, phones roam between the two wi-fi zones seamlessly *except* the iPhone 6 (iOS8.1), this works on the cable modem wi-fi - but not on the X3500 wi-fi. I also have an iPad Mini 2 (also iOS8.1) which also works - so rightly / wrongly I've ruled out iO8.1 as the issue. Oddly the iPhone 6 connects to the x3500 but doesn't obtain an IP address (the cable modem is the DHCP server). Even setting a static IP address doesn't help.
Observation(s):
If the X3500 is setup as a DHCP server, the iPhoen connects (and gets an IP address), but then the default gateway is incorrect (gatway is the IP address of the X3500 not the remote cable modem). I can't find anywhere to specify a default gateway in the setup.
Question
I'm beginning to think this is an issue with the iPhone 6 (knowing all other devices work correctly), but I just want to make sure I'm configuring the X3500 correctly. I'm specifically interested in the whether I'm using the right "Mode"ADSL / Ethernet. I've tried "Bridged Mode Only" (ADSL) and "Automatic DCHP Only" (Ethernet) but neither seem to resolve the issue that the iPhone 6 is having.
any suggestions on how to resolve / troubleshoot would be most welcomed.
Thanks!
Solved!
Go to Solution.

Yes, there's a way for you to override the IP Address. It is on Router Address under Network Setup on the Basic Setup tab. If I'm not mistaken, one end of the Ethernet cable should be connected to the regular Ethernet port of the cable modem and the other end to the cable port of the X3500.
But if it's just the iPhone that won't connect to the X3500, it might be okay to retain the current configuration of the router, but try adjusting the wireless security mode or set the wireless channel to 11 and observe what happens.

About the dhcp issue

I am sorry a am i newbie in dhcp.
I have a v490 server ,with 4g memory,the server is to be configured as a dhcp server.And i add subnets to the server ,and then distribute IPs for each subnet.
The are about 50 subnets and 8000 IPs in each subnet,but when i tried to add the 51th subnet,there is a error:
Error editing the macro 10.212.192.0,message from the server was :Non-memory resources unavailable
I tried to add another subnet,but the issue persists.Is there anybody could help me???

Well it looks like you did as much as you can. I would try to do this next. Configure a temporary dhcp on the access point and see if you can you get an IP Address. Also place a sniffer and monitor the port to see if you can see any request or replies. Other than that, you can always try to load a different IOS version and see if that works for you.

6500 DHCP ISSUE

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