Vlan Select and DHCP reservations on a WISM with code 7.0.116.0

We went to using vlan select this semester and have had a couple of issues where clients (printers) wont pull their reserved ip from dhcp. From what I've read vlan select can handle static ip addresses but can it handle dhcp reservations if the current vlan selected in the round robin function is not the vlan that the ip is reserved in?

George,
Are you talking about a dhcp mac reservation for a device on all vlans in the bundle? If so, you can... The issue I ran into is that clients had to connect to a wireless printer and a wireless projector and they connected to it via ip address. So it became a nightmare with users. They just kept complaining that it works some days and other days it doesn't. Some devices were powered off after it was used. It would be nice if you can import a list of Mac address and specify what interface it is allowed on... That would make it easy.
Sent from my iPhone

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Hei!
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Thanks Mark, but you answered what I already included within my question. I wrote "So it's that, or disabling the hyperlink, move the object normally, and putting the hyperlink on again"
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Dynamic VLAN assignment and DHCP

Hello
I have just upgraded our WLC from 4.0 to 7.0 (via 4.2).
Before the upgrade we had our ACS returning a VLAN based on user group. This seemed to be working without an issue. Now that the WLC is on version 7 this is no longer working correctly. The ACS is returning a VLAN and passing the user but the client can not get an IP from the DHCP server configured.
Example configuration:
SSID-----VLAN
PN-CSC-----CSCVlan: Works
PN-Others------OthersVlan: Works
PN-Others-----CSCVlan: No DHCP
When users are trying to be allocated to a vlan that is different from the native one the DHCP fails however both WLANs are configured to point to the management interface so dont have any real connection to the vlan other than by name.
Have there been any changes I haven't seen in the way the dynamic vlan allocation works in version 7?

Yes, DHCP proxy could be the culprit here. In 4.0 it was only a CLI command to enable/disable the proxy feature. In 5.2, I think, and later it is in the GUI
as well.
There is a defect filed against the behavior of the WLC DHCP funtion out there currently. If all of your DHCP is coming from external resources than you can disable proxy. If, however, you are using the WLC as DHCP server for guest access, then proxy must be enabled. If the later is true, you should contact TAC, as there is an engineering special available that has the defect resolution.
Sorry I can't provide the defect ID, my CCO account is acting up.
Cheers,
Steve
If this helps you and/or answers your question please mark the question as "answered" and/or rate it, so other users can easily find it.

VLANs, IPs and DHCP

This may be a silly question but here goes:
I have to set up two VLANs that do not speak to each other but use one uplink to the internet. I know how to set up VLANs and I know how to set it up so that it does not talk to each other. However, I only have one DHCP server. Is there any way to make that server assign IP addresses to both VLANS (i.e. VLAN01 IP block 192.168.1.0 and VLAN02 IP block 192.168.2.0)?
Thank you.

Hello,
there are several options available.
First you can setup a trunk to the server, if the server NIC is capable of doing this.
Second you could use two ethernet interfaces on the server and attach it into the two VLANs. In both cases configure a matching IP address in each VLAN on the server.
Third you could use a router with an "ip helper-address " command on a VLAN subinterface to operate as DHCP proxy. In the latter case you should apply additional access-lists to prevent inter-VLAN traffic. The router could even be operated as DHCP server itself, in case this would be interesting to you.
In any case you have to configure your DHCP server to support both address ranges.
Hope this helps! Please rate all posts.
Regards, Martin

E4200 : DHCP Reservation not showing anything !?!

Hello,
When I'm in Setup -> Basic Setup -> click on DHCP Reservation, I don't see all entries I've created earlier but computers that connect still have the correct IP address on the network; I don't know if I can create additional entries if nothing appears, what should I do ?
When I go to Status -> Local Network -> DHCP Client Table the list is blank but some computers are connected to the network
I'm using firmware 1.0.01 build 10 Feb 21, 2011, language = English, Firefox 4.0.1
Rebooting the router doesn't change anything, I can't see connected LAN equipment and DHCP Reservation is empty despite the fact I've created entries.
Together with the "Access Restriction" which doesn't allow to block a computer from 10pm => 8am unless you create 2 rules + various issues with attached USB + 2.4Ghz signal that is far from optimal (never able to achieve more than 144-N-Mbps) and I ask myself if I will not contact the store where I purchased this unit and ask a refund (and buy something else from another brand...)
It's the first time I buy a Linksys equipment and very disappointed, support doesn't seem to be very serious
Thanks for any suggestion
PS: Where do I ask for a refund or something similar in Linksys site ? If nothing exists, I'll let the store where I purchased this unit now about the present post

Thanks for your answers
Today it works and I didn't reboot, restart or reset anything
I can see DHCP Reservation list + DHCP Clients Table
Same PC, same network, nothing restarted, reset, changed or added and now it works
Weird
I would not like to re-create everything in the DHCP Reservation List as I have 17 entries so far (and going to add 1 more...)
Apparently, if I can't see my list, I have to wait a few days

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I am going to implement this vlan select feature in my campus network. We are running on 7.3 & planning to move into 7.4 WLC code as well. I use below reference document for this task.
WLC 7.2 VLAN Select and Multicast Optimization Features Deployment Guide
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config network multicast l2mcast <enable|disable > <interface>"
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config network multicast l2mcast disable student-wireless-2
config network multicast l2mcast disable student-wireless-3
config network multicast l2mcast disable student-wireless-4
If it is not enabled by default, shoud I go ahead enable it on one interface like below ?
config network multicast l2mcast enable student-wireless-1
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Thanks for the help but I found some further information. Some switches (2955, 2960, 3560 or 3750) can act as a "multicast querier", taking place of a multicast router without actually needing to support multicast routing. This means you dont actually need IP Services IOS or a layer 3 switch.
Configuation as per below;
http://www.cisco.com/en/US/customer/products/hw/switches/ps5528/products_configuration_guide_chapter09186a00803a9a29.html#wp1187873
Supported platforms below (look for igmp querier);
http://www.cisco.com/en/US/customer/tech/tk828/technologies_tech_note09186a0080122a70.shtml#topic3
Thanks for putting me on the right track however.

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Hi all,
I have digged through the WLC documentation for 7.3 and in the chapter about Radius NAC I read that the VLAN select feature is not supported.
Does anyone know if this will change?
VLAN select is actually a useful feature and I wouldn't understand if NAC support over the ISE won't be possible.
Hope someone can shed some light on this.
Regards,
Patrick

I think with radius the vlan select and dynamic vlan assignment are two different topics. You can have ISE set users on different vlans within the same WLAN as long as the interface is present on the controller. I have tested this and works just fine.
The vlan select maybe a topic that the wireless folks can shed some light on.
Thanks
Tarik Admani
*Please rate helpful posts*

1142 AP disassociate from WISM code 7.0.116.0

We see different 1142 APs disassociate from wisms from time to time. When it happens, we have to do shutdown and no shutdown on the switch port to bring the APs back. It just starts to happen after we upgraded wisms to code 7.0.116.0 and it only happens to c1142 APs. It does not happen very often (about 2 issues each week). Anyone see this issue as well?
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Any ideas why we need to upgrade the bootstrap?
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WLC 5508, vlan select, reserved address in external DHCP server

Hi guys,
I have a deploy with a WLC 5508 version 7.0.116.0, APs mode local and vlan select feature enable. The issue is that the reserved IP address in external DHCP server not work. The DHCP contains a reserved IP address associates with mac address, but the assignement of IP is not match with de policies in DHCP. All others services operate normally.
This reserved assignment operate previusly to modificate the WLAN to vlan select feature. Help me to improve this situation.
Thanks.-
Best regards

Hello Abhishek, thanks for you quick answer....
the link was a document used for the deploy, but not especifict nothing about the reserved IP address for particular host. In other words, the reserved IP address (through MAC address) in external DHCP server not work when "vlan select" its enable.

DHCP Reservation Sync and DNS Host record sync etc shown in IPAM GUI

Hello all,
I am aware of the scripts in the TechNet script center to sync DHCP leases etc to IPAM, however my question is about something else -
If you highlight an IP address (IP address inventory->select an IP), You can see fields that say: "DHCP reservation sync", "DNS PTR record sync" and "DNS host record sync" as below:
I was curious as to what these are for. Is there some built-in sync functionality for these that I perhaps have not enabled? (Don't see such options any where..)
thanks,
-Ravi

Hi Ravi ,
The three columns tell us the information of the synchronization between IPAM server and DNS server (or DHCP server) .
Here is the detailed guide for using IPAM :
Using the IPAM Client Console :
https://technet.microsoft.com/en-us/library/jj878351.aspx#inventory
IPAM can sync DNS and DHCP records .
The IPAM database is separate from DHCP and DNS servers on our network ,and full synchronization of hosts and IP addresses between IPAM and managed DNS or DHCP servers does not occur automatically
unless we have configured automated tasks to perform this synchronization .
For detailed information ,see
DNS and DHCP record synchronization chapter in the following link :
Multi-server Management :
https://technet.microsoft.com/en-us/library/jj878329.aspx
Best Regards,
Leo
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

WRT1900ac and DHCP Static IP Reservations

I was trying to configure my WRT1900ac last night and had problems with DHCP reservations.
I wanted to manually add all the IP addresses prior to switching everything over to the router (to avoid any potential conflicts). I changed the router to 10.0.1.1 and wanted the DHCP to start assigning random clients at 10.0.1.100. I have static IP addresses grouped (i.e., 10.0.1.1-10.0.1.9 as network hardware, 10.0.1.10-10.0.1.19 as computers, 10.0.1.40-10.0.1.49 as TiVo equipment, etc.).
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You need to ensure you are setting each device to Automatic Obtain IP addressing if your going to use Reserved IP address ON the router. Static isn't the same as Reserved. Static is set on devices while Reserved is set ON routers. Reserved IPs is preferred and recommended over Static for most devices. I recommend you try using the Default DHCP pool of 192.168 at first so you can check to see the process. It should appear in the device list then just select ADD to add it to the reservation on the router. Once you get the process down, then you could change the DHCP pool numbers however it's not recommended.

I want to reserve a static IP address on my Airport extreme. What is the difference between reserving by MAC Address and DHCP Client ID?

I want to understand the differences in the way you can reserve a static address for a device on the network. I had previously set the device itself to an address and then reserved it with DHCP Client ID, which I thought was just the devices static addresss. I'm not sure if this was in fact correct or just happend to work. I know what a MAC address is, but I'm not really sure what the DHCP Client ID is. So it would be great if someone could clarify it, and the difference between reserving address by MAC Address or DHCP Client ID.

A MAC address is a unique identification consisting of letters and numbers in a form that looks like this:
xx:xx:xx:xx:xx:xx
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Open System Preferences (gear icon on the dock)
Open Network
Click on Ethernet
Click Advanced at the lower right
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I am trying to configure my Aironet 1121G acess points with several vlans, got the vlans all working fine with wired devices, but the wirless devices don't get DHCP.
Basically, I have the BVI on my managment vlan and two other vlans that pass through, trying to have the public WiFi on 1 vlan and two corporate vlans with seperate wifi. can't get IPs on any of them though.
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DHCP comes from 2 windows server 2003 boxes on a further vlan
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Vinod,
Here is the AP config, I'm confused, so any help would be useful, got to get a wireless course under my belt.
Cheers,
Peter
version 12.3
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
hostname IT_AP1121G_01
no logging console
enable secret
ip subnet-zero
aaa new-model
aaa group server radius rad_eap
aaa group server radius rad_mac
aaa group server radius rad_acct
aaa group server radius rad_admin
aaa group server tacacs+ tac_admin
aaa group server radius rad_pmip
aaa group server radius dummy
aaa authentication login eap_methods group rad_eap
aaa authentication login mac_methods local
aaa authorization exec default local
aaa accounting network acct_methods start-stop group rad_acct
aaa session-id common
dot11 vlan-name Corporate vlan 3
dot11 vlan-name Default vlan 1
dot11 vlan-name Managment vlan 2
dot11 ssid stosWIFI
vlan 1
authentication open
guest-mode
mbssid guest-mode
infrastructure-ssid optional
mobility network-id 1
dot11 ssid stoswaldsWIFI
vlan 3
authentication open eap eap_methods
mobility network-id 3
username admin privilege 15 secret 5 $1$.dBF$jstGCUjGPaD6OQ/JVmZEY1
bridge irb
interface Dot11Radio0
no ip address
no ip route-cache
shutdown
encryption key 1 size 128bit 7 0D1A262E215F252C7E5A2D6A6498 transmit-key
encryption mode wep mandatory
encryption vlan 1 key 1 size 128bit 7 DA303E012047F6068707FC131B4A transmit-key
encryption vlan 1 mode wep mandatory
encryption vlan 3 mode wep mandatory
ssid stosWIFI
ssid stoswaldsWIFI
mbssid
speed basic-1.0 basic-2.0 basic-5.5 basic-6.0 basic-9.0 basic-11.0 basic-12.0 basic-18.0 basic-24.0 basic-36.0 basic-48.0 basic-54.0
channel 2412
station-role root
world-mode dot11d country GB both
interface Dot11Radio0.1
encapsulation dot1Q 1 native
no ip route-cache
bridge-group 254
bridge-group 254 subscriber-loop-control
bridge-group 254 block-unknown-source
no bridge-group 254 source-learning
no bridge-group 254 unicast-flooding
bridge-group 254 spanning-disabled
interface Dot11Radio0.3
encapsulation dot1Q 3
no ip route-cache
bridge-group 3
bridge-group 3 subscriber-loop-control
bridge-group 3 block-unknown-source
no bridge-group 3 source-learning
no bridge-group 3 unicast-flooding
bridge-group 3 spanning-disabled
interface FastEthernet0
no ip address
no ip route-cache
duplex auto
speed auto
interface FastEthernet0.1
encapsulation dot1Q 1
no ip route-cache
bridge-group 254
no bridge-group 254 source-learning
bridge-group 254 spanning-disabled
interface FastEthernet0.3
encapsulation dot1Q 3
no ip route-cache
bridge-group 3
no bridge-group 3 source-learning
bridge-group 3
interface FastEthernet0.2
encapsulation dot1Q 2 native
no ip route-cache
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
interface BVI1
ip address 192.168.2.33 255.255.255.0
no ip route-cache
ip default-gateway 192.168.2.1
ip http server
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
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logging trap notifications
logging
radius-server attribute 32 include-in-access-req format %h
radius-server vsa send accounting
control-plane
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password
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DHCP reservations sometimes work and sometimes not.

Hello.
I have created a few DHCP reservations in my enivoriment. Some of the reservations do take and some do not. I even recreated the reservations verified the MAC addresses rebooted the PC also a IPCONFIG/release and IPCONFIG/renew
still will not grab the IP address set in the reservation.
What more can I look at since some reservations work and some do not?

Hi,
Does the client get the IP address from the DHCP server which has reservations? You may check this by "ipconfig /all".
If yes, please check that if there is any warning or error in the event viewer of the DHCP server.
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If it is possible, please post these warnings and errors here. It's useful for further troubleshooting.
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TechNet Community Support

VLAN Select (Interface groups) and Outdoor AP 1552

Hi board,
I'm just reading the 7.2 release configuration guide and found this:
http://www.cisco.com/en/US/docs/wireless/controller/7.2/configuration/guide/cg_ports_interfaces.html#wp1384874
Chapter VLAN Select - "Guidelines and Limitations"
The following lightweight access points are supported: Cisco Aironet 1120, 1230, 1130, 1040, 1140, 1240, 1250, 1260, 3500, 1522/1524 Access Points, and 800 Series access points
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As long as the 1552 is in local mode, it has the same features as the other AP's listed and vlan select is one of them. If you change the role to bridge, then no.
Sent from Cisco Technical Support iPhone App

Vlan Select and DHCP reservations on a WISM with code 7.0.116.0

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