Upgrading two 5508's in mobility group

I can't for the life of me find an answer but I thought there was some extra "notes" for upgrading two 5508 controllers in a mobility group. I have about 150 AP's (1140 series) and would really like to minimize the downtime as much as possible. My current plan is as follows:
Upgrade WLC-2 (the secondary)
Reboot WLC-2
Upgrade WLC-1 (Primary w/all the AP's attached)
Push the AP image {predownload primary all}
Wait for the push to finish
Reboot WLC-1
Any tech notes / real life lessons learned you can share would be great. It's a Hospital so I need to keep the downtime to an absolute minimum.
Going from 7.0.116 to 7.4.110
Thanks,
Todd

As long as you will not be going to implement HA SSO, 7.4.110.0 seems to be a good version. Although I haven't used this, some people have had good results with this version.
Your upgrade process is OK.

Similar Messages

Migrating 2 standalone 5508 to one mobility-group

hey everyone,
for some reason our wlan-controllers were build up to be standalone instead of beeing one mobility-group.
I would like to change this in order to use all features of HA.
let me describe our scenario:
two WLCs 5508 running SW ver. 6
- same subnet
- both are running in master controller mode
- different hostnames, ip-addresses, etc
- all settings for WLANs and AP-groups (exept the APs themselves in these groups) are the same
- in total at this moment we are running around 100 LAPs configured one half on WLC#1, the other half on WLC#2
I don't know exactly why, but when that setting was installed, someone already configuredHA for each accesspoint...
e.g.:
- AP#1 primary WLC#1, secondary WLC#2
- AP#2 primary WLC#2, secondary WLC#1
but without WLC#2 knowing the configuration for AP#1 it makes no sense, correct?
so my question is: how should I do the migration in the best way?
is it easy as:
- disabling master controller mode on WLC#2
- configuring both WLCs into one mobility group
--> WLCs are negotiating their configurations for the APs
and everything is fine after this?
comments appriciated. ;-)
rgeards, Manuel

Master Controller Mode is only listened to if the AP does not have a primary controller set.
So all you should need to do is change the mobility group name on the Controller tab to match between the two, then go into the mobility group and edit the mac/ip address of the WLC to be in both WLC. Make sure you use the mac address from the mobility configuration, and you should be good.
Steve

WLC mobility group between 4404 and 5508 controllers

Mobility 'Control and Data Path Down' between 4404 and 5508 WLC's.
Hello, we have 5 x 4404 WLC's running 7.0.240.0 with mobility configured fine between them.
We have installed a 5508 with HA running 7.4.110.0, and have tried to add it to the mobility group, however we see 'Control and Data Path Down' between the new 5508 and all the 4404 controllers.
All controllers have:
The same virtual address
Management interfaces are in the same VLAN, and indeed all the controllers connect via the same pair of 3750X stacked switches.
The default mobility domain name is the same
4404 output when issung the command 'show mobility summary'
Symmetric Mobility Tunneling (current) .......... Enabled
Symmetric Mobility Tunneling (after reboot) ..... Enabled
Mobility Protocol Port........................... 16666
Default Mobility Domain.......................... SGH-Mobility
Multicast Mode .................................. Disabled
Mobility Domain ID for 802.11r................... 0xe209
Mobility Keepalive Interval...................... 10
Mobility Keepalive Count......................... 3
Mobility Group Members Configured................ 6
Mobility Control Message DSCP Value.............. 0
5508 ouput when issueing the command 'show mobility summary'
Mobility Architecture ........................... Flat
Mobility Protocol Port........................... 16666
Default Mobility Domain.......................... SGH-Mobility
Multicast Mode .................................. Disabled
Mobility Domain ID for 802.11r................... 0xe209
Mobility Keepalive Interval...................... 10
Mobility Keepalive Count......................... 3
Mobility Group Members Configured................ 6
Mobility Control Message DSCP Value.............. 0
I've spent quite some time double checking all the configurations to no avail.
Has anybody seen this problem before?
Kind regards
Dave Bell

Thanks Sandeep.
I am well versed with WLC's and mobility, however trying to add a 5508 to a mobility group with 4404's has come up with a bit of a curve ball.
All the 4404 controllers all joined the mobility group fine, no problems at all - its only the 5508 I am struggling with.
In theory its simple, populate the IP address, and MAC addres of the management interface of the remote WLC, as long as the management interfaces are in the same VLAN, and the Default Mobility Domain Name are the same it should come up.
Interestingly I have found the 5508 reports its own management interface MAC address incorrectly when viewing the Mobility Groups:
For example:
{Screen shot WLC1.jpg}
5508 management address is 10.95.x.x and when viewing the Mobility Management screen it shows its own MAC address as bc:16:65:f9:37:60.
however!
From our router is I do an sh arp | i 10.95.x.x (controller management address), I see:f872.eaee.becf.
{Screen shot wlc2.jpg}
Hence the WLC reports as: bc:16:65:f9:37:60
and
The network reports as: f872.eaee.becf for the same IP address.
I have changed the other WLC's to the MAC adress seen on the network for the new controller, aka changed from
bc:16:65:f9:37:60
to
f8:72:ea:ee:be:cf
I now see the controllers reporting the mobility with the new controller as 'Control Path Down', however I am at a loss as to what may be causing this?
Kind regards
Dave Bell

WLC MOBILITY GROUP SINGLE WEB AUTHENTICATION

Hi.
I have installed two AIR-WLC2112 with mobility group configured and authentication web.
I want to know if you can create user / password web authentication only in one WLC.
Now, when I create a new user / password , I have to create in two WLC.
Thanks

Inorder to validate a site issuing a certificate , client should be loaded with a certificate from same Certificate Authority. Else ignore the warning and continue to the site. If you want to know if the site is valid , click on View certificate on the warning page and see if it belongs to the website.

Can't put two 5508 WLCs in the same RF group

Hi experts,
I have two 5508 WLCs and I want them to be backup to each other. I put in the same "RF Group Name" and even the same "Default Mobility Domain Name" however under Wireless -> 802.11b/g/n -> RRM -> RF Grouping each controller still only have themselves as the only memter to the group.
Two controllers are having management IPs on the same subnet 192.168.161.x/24. AP-manager interfaces are in the same network as well. They can ping each other fine. The following screen shots show the current relavent config on the controller:
I do have two controllers in the same mobility group and they are both showing up...
Does anyone know why they can't add each other to the RF group? All other settings are pretty much default...
Thanks!

Hi,
is there a chance that one of the 2 WLC doesn't contain any access point ? Or that the APs from one WLC are not physically close to the APs of the second WLC ?
The point of RF grouping is to exchange RF information, to make RRM decisions together and to know what ap is a rogue and which is not. RF group information travels over the air from AP to AP.
So if a wlc has no ap of if its APs are not close to those of the other WLC there is both no point in grouping with the other WLC in rf group and also no technical way of doing so.
Regards,
Nicolas
===
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WLC 5508 * 2 & Mobility Group

What I am trying to configure is Mobility Groups.
My understanding is that this will allow AP to successfully register and fail over over seamlessly if any of the WLC had to fail ?
It could be I am confusing two things into one :( & I am totally confused and not understanding the benefits of mobility group mentioned above.
Also when a AP starts up and registers with the WLC ......I click on a registered AP > High Availability ( Primary / Sec / Tertiary ) all fields are blank...
Initially I also thought that once my SSO is all setup and working than those options "AP > High Availability" will get populated automatically but clearly not unless something is not working.
My current config is as follows:-
WLC 5508 * 2
WLC 1 - Primary
WLC 2 - HA SKU (Secondary )
Redundancy = SSO (Both AP and Client SSO)
=============
(Cisco Controller) >show sysinfo
Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 7.6.130.0
Bootloader Version............................... 1.0.20
Field Recovery Image Version..................... 7.6.101.1
Firmware Version................................. FPGA 1.7, Env 1.8, USB console 2.2
Build Type....................................... DATA + WPS
System Name...................................... WLC5508
System Location..................................
System Contact...................................
System ObjectID.................................. 1.3.6.1.4.1.9.1.1069
Redundancy Mode.................................. SSO (Both AP and Client SSO)
IP Address....................................... 10.31.66.21
Last Reset....................................... Software reset
System Up Time................................... 0 days 22 hrs 39 mins 57 secs
System Timezone Location......................... (GMT) London, Lisbon, Dublin, Edinburgh
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180
Configured Country............................... GB - United Kingdom
Operating Environment............................ Commercial (0 to 40 C)
--More-- or (q)uit
Internal Temp Alarm Limits....................... 0 to 65 C
Internal Temperature............................. +38 C
External Temperature............................. +21 C
Fan Status....................................... OK
State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Enabled
Number of WLANs.................................. 1
Number of Active Clients......................... 0
Burned-in MAC Address............................ F8:72:EA:EE:5B:B2
Power Supply 1................................... Present, OK
Power Supply 2................................... Absent
Maximum number of APs supported.................. 500
============================================
TA

TA,
Mobility and mobility groups are used for the wireless users roaming. What we know that a wireless users can roam between different APs within the same WLC, but when the SSID is used within multiple WLCs, and the client wanted to roam to an AP joined to another WLC, you would need to configure WLC mobility to maintain seamless roaming. For more info:
http://www.cisco.com/c/en/us/td/docs/wireless/controller/8-0/configuration-guide/b_cg80/b_cg80_chapter_010001101.html
Now, I understand that your purpose is to have high availability for your APs. No this is done traditionally from the AP page, under HA tab, where you configure the WLCs names and IPs there. This can be done manually on each AP (you can use CLI to make it easier) or you can push a configuration template using a management server (WCS/NCS/CPI).
Configuring HA on the AP:
http://www.cisco.com/c/en/us/td/docs/wireless/controller/8-0/configuration-guide/b_cg80/b_cg80_chapter_01110000.html
http://www.cisco.com/c/en/us/td/docs/wireless/controller/8-0/configuration-guide/b_cg80/b_cg80_chapter_01110001.html
Using CPI to push AP configuration templates:
http://www.cisco.com/c/en/us/td/docs/wireless/prime_infrastructure/2-0/configuration/guide/pi_20_cg/temp.html
Now mobility may play a role in this, as if you have already configured mobility for your WLCs, then you won't need to configure a "name" for the WLCs when you add them under the HA tab in AP configuration page. That's it.
BR, Ala

WLC 5508 and mobility groups

Hi,
We are using 2 WLC 5508 running 7.0.98.0 sw (AP's are 1142) at our primary site. They are hosting 3 different WLAN/SSID's, one for guest and the
other 2 are for corporate access. We have put the WLC's in a mobility group, say "AAAA".
Now we have the need for our UK peer site to publish a corp WLAN that exists in UK - at our site, and when trying to configure for that (following the c70cg.pdf) - I put the WLC's for UK in a new mobility group, say "BBBB". But i can't add our WLC's into that mobilty group
(i get a duplicate mac address message).
What's the correct way of configuring this, does all WLCs need to be in the same mobility group?
Is there some reason why we can't have 2 mobility groups? Is there any upside/downside to configuring 2 mob. groups?
Any clearification would be greatly appreciated
BR
//Mikael

I think you are misunderstanding , so far what you did on your local swedish site is correct. Your two swedish WLCs have to be in their own same mobility group so you can give seamless roaming to your wireless users across your swedish area without interruption.
On a WLC mobility group config page, you can have only one entry per WLC, this is why you are getting the duplicate error message.
WEBGUI - CONTROLLER - MOBILITY MANAGEMENT - MOBILITY GROUPS
If you want to put your 4 WLCs so they exchange mobility messages, the following has to happen on all 4 WLCs.
xx:xx:xx:xx:xx:xx 192.168.1.1 uk
yy:yy:yy:yy:yy:yy 192.168.1.2 uk
zz:zz:zz:zz:zz:zz 172.17.1.1 sweden
aa:aa:aa:aa:aa:aa 172.17.1.2 sweden
Note when you add WLC on the mobility section, the WLC start sending messages to each like, hey i have this client and you have that client and so on. But this has nothing to do with what you are trying to achieve.
With regards to the execs that are coming, yes, replicate the SSID and point it to the Radius Server they have in UK, add your swedish WLC(s) as a NAS on the Radius Server and it should work as if they were in UK. that should be enough and i advise you to do the following for mobility groups config.
on the two UK WLCs
xx:xx:xx:xx:xx:xx 192.168.1.1 uk
yy:yy:yy:yy:yy:yy 192.168.1.2 uk
on the two Swedish WLCs
zz:zz:zz:zz:zz:zz 172.17.1.1 sweden
aa:aa:aa:aa:aa:aa 172.17.1.2 sweden
hope i cleared it out for you. greeting from cold Belgium tonight :-) and hope the execs will enjoy Sweden!

5508 Mobility Groups

Hello.
2 questions
1) Is it possible for 2 WLCs installed in seperate data centres with L3 seperation to be joined in a mobility group? We will have aps in the branch offices split between controllers so we want to make sure roaming work ok. Also all guest access should be anchored to data centre 2.
2) in flexconnect local switching mode, do I need to create flexconnect groups if I'm only using radius servers in the data centre with no requirement to use local radius as a backup?

Mobility groups can work when the WLC's are in different subnet asl long as UDP 16666 and IP 97 allowed between the two WLC's.
http://www.cisco.com/en/US/docs/wireless/controller/7.0/configuration/guide/c70mobil.html#wp1102312
You will not be able to configure for guest, what wlc is primary or secondary. The foreign WLC will decide which guest anchor controller (if there is two) it will use.
You don't need to use flexconnect groups if you don't want to. If your devices are not cckm compliant, then I wouldn't worry about it personally. Here are the numbers, but some has changed with the 7.3.
The number of FlexConnect groups and access point support depends on the platform that you are using. You can configure the following:
•Up to 100 FlexConnect groups for a Cisco 5500 Series Controller
•Up to 1000 FlexConnect groups for a Cisco Flex 7500 Series Controller. The Cisco Flex 7500 Series Controller can accommodate up to 50 access points per FlexConnect group.
•Up to 20 FlexConnect groups with up to 25 access points per group for the remaining platforms.
https://supportforums.cisco.com/docs/DOC-26778#Increased_scale_for_Cisco_Flex_7500_Series_Controllers_668166
Thanks,
Scott
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Wireless 5508 WLC's in a Mobility Group

All,
Scenario: Would like redundancy on 2 x 5508's but unable to utilise HA (SSO) due to internal WLC DHCP requirements.
Mobility groups - Can 2 controllers in the same mobility group share a DHCP scope? I.E overlapping addresses or would the scope need to be split across controllers?
If scopes are slit hat happens to DHCP requests once the primary DHCP server has allocated all leases? Also what happens if a clients joined controller A receives valid IP address then controller A goes off line? AP's re-establish with controller B but client has invalid scope IP?
Cheers,
Jay

Hi,
Actually in the Mobility Group you enable the user to move form one WLC APs coverage to other WLC APs coverage with same client IP configuration.. so if we make groups then obviously we should make different DHCP scope to avoid network address range exhausted.
As far as controller A is up, IP configuration on wireless client would be remain same, but if your controller A goes off then the client will acquire the new IP from different DHCP scope which is assigned to controller B.

Create 2nd mobility group on 5508

Hi all,
We are running all our APs in H-REAP mode connecting to WLC 5508 (7.2.xxx)
Each H-REAP AP has local switched SSID, as well as a guest SSID (centrally switched), which is 'tunneled' to the WLC, with Internet only access through the DC.
All the AP's connecting to the WLC using the managment interface, which is also the local mobilty group.
To route traffic different for the guest WLAN, I'd like to create a new Interface on WLC and use this as local mobility group for the guest WLAN.
Is this possible, or is the managment interface always the local monility group?
Appreciate your feedback.
Thanks,
Stefan

Hi Rasika,
Each of our branch sites have 2 WAN connections. 1 MPLS (critical traffic), 1 IPsec (non critical).
While the managment interface of WLC is reachbale through MPLS, I'd like to route traffic for Guest WLAN over IPsec.
Therefore I would need create a 2nd Interface on WLC (different IP range) and terminate centrally switched traffic on that interface.
As you've mentioned the local mobility group is always the controller MAC (management int), so not sure if there's another way to solve this?
H-REAP AP,s register to managmnet int      --> routed through MPLS
centrally switched traffic to different int          --> routed through IPsec
Thanks,
Stfean

5508 Mobility Group

Clients are not able to roam between WCS controllers. Our mobility groups are working but we are not able to pass DHCP addresses between controllers

When you say mobility is working, what do you mean? Are you trying to use WLCB to assign a client on WLCA an address?

Converged Access Design Help (Catalyst 3850 and WLC 5508...Mobility Oracle)

Hello,
I am an engineer working with a Cisco Gold Partner in Saudi Arabia. We have a large university as our client where they are constructing a new
building and require our services to build the network infrastructure. Therefore, we are to implement the routing and switching infrastructure as
well as the Wireless solution.
At present, I have no issues in implementing the R&S infrastructure as it is very straight forward but it has implications on the deployment of
the wireless solution which I explain further below. The R&S infrastructure comprises of the typical Core, Distribution, and Access layers and we
are focusing on the local distribution and access switches with regards to the new building. The client has a converged Layer 3 network spanning
from distribution layer to core layer and they are running EIGRP for this convergence. This is not a problem and has already been implemented.
Yet, the challenge arises in deploying the WLAN infrastructure. The client already has a Cisco WLAN infrastructure in place where they have a
large number of LAPs that are registered with their controllers in the Data Center. They have two WLC 5508 where one is the Primary and the other
the Secondary. The local distribution switch to which the WLC are connected also is the gateway for the SVIs for the SSIDs that are configured on
the controllers. This means that once the packets from the AP come in to the WLC, they are tagged with the correct VLAN and sent to the directly
connected distribution switch which then routes it into the rest of the Layer 3 network. Interestingly, the WLC 5508 are running AireOS 7.6 and
support the "New Mobility" feature. The two controllers have formed a Mobility Group (MG) between each other.
Now, the new building will have two Catalyst 3850 switches installed where each one has a total of 40 AP licenses pre-installed and activated
i.e. a total of 80 APs can be supported by the two switches. A total of 67 LAPs will be deployed in the new building which can be accommodated
between the two switches and their integrated controller.
Yet, based on my understanding and research about Converged Access is that, ideally, the Catalyst 3850 will only run the Mobility Agent (MA)
feature while a central controller would provide the Mobility Controller (MC) service. unfortunately, there are not enough licenses on the
existing WLC 5508 nor can we migrate the new licenses that will facilitate such a split deployment.
This means that I would need to configure the two Catalyst 3850 as independent MC and form a MG between them. I have done this and tested this
already and the mobility is working fine. But my concern is not about getting the Catalyst 3850 to work as this is simple but rather it is
focused on creating a common Mobility Domain (MD) so that clients can roam from this new building to the rest of the campus while maintaining the
state of their connections to the WLAN infrastructure.
To make things more complicated, since the new building will have its own Layer 3 distribution switch and the Catalyst 3850 switches will connect
to this distribution switch, it means that new VLANs and SVIs need to be created for the SSIDs broadcast in the new building. This means that new
subnets need to be assigned to the SSIDs.
As such, I have the following questions:
Q1) If we create new SVIs for the SSIDs (same SSIDs names will be used in the new building as in the rest of the university campus) this means
that new subnets will be assigned to these SSIDs. Now, I believe I have two options...one is to make the new Catalyst 3850s to be in the same MG
as the existing WLC 5508 which then cater for Layer 3 client roaming or I have to treat this as a totally seperate WLAN network and follow on to
the solution as per the next question. Please advise which is a better option?
Q2) I could create separate MG i.e. the new building Catalyst 3850s can be in one MG and the existing controllers can be in another MG. I can
then have one of the existing WLC 5508 (the primary one) to run the Mobility Oracle (MO) feature so as to create a single Mobility Domain (MD).
Would this facilitate in Layer 3 client roaming and RRM for all the controllers in the same MD?
Q3) If I do create a MD, how is this accomplished in such an environment since the documentation is severely limited in this regard?
Please advise at your earliest. To assist further, I have attached a topology diagram which may aid in explaining the situation with more
clarity. If these things are clarified, I will be better able to wrap my head around the technology and in turn service my clients better.
Regards,
Amir

Hi Amir,
Q1) If we create new SVIs for the SSIDs (same SSIDs names will be used in the new building as in the rest of the university campus) this means that new subnets will be assigned to these SSIDs. Now, I believe I have two options...one is to make the new Catalyst 3850s to be in the same MG as the existing WLC 5508 which then cater for Layer 3 client roaming or I have to treat this as a totally seperate WLAN network and follow on to the solution as per the next question. Please advise which is a better option?
I would configure them in the same mobility group. Also configure same SPG for those two 3850 stacks if users are frequently roaming within these two buildings.
Q2) I could create separate MG i.e. the new building Catalyst 3850s can be in one MG and the existing controllers can be in another MG. I can then have one of the existing WLC 5508 (the primary one) to run the Mobility Oracle (MO) feature so as to create a single Mobility Domain (MD). Would this facilitate in Layer 3 client roaming and RRM for all the controllers in the same MD?
MO is not required (it is only for very large scale deployments)
Q3) If I do create a MD, how is this accomplished in such an environment since the documentation is severely limited in this regard?
Yes, documents are hard to find :(
These notes may be useful to you based on my experience. I am running IOS-XE 3.6.1 in my production.
http://mrncciew.com/2014/05/06/configuring-new-mobility/
http://mrncciew.com/2013/12/14/3850ma-with-5760mc/
HTH
Rasika
*** Pls rate all useful responses ****

Mobility Group Member Down Status

The mobility group members from our guest controller have went into a down status twice since upgrading the 5508 WLC to software version 7.4.110. What can we do to remedy the problem?

1. First upgrade the WLC to 7.4.121.0 version (this is pretty stable).
2. paste the config and logs from WLC.
Regards
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Multiple Ports & Mobility Groups

On our wireless network we have two 6509-E switches each with a WiSM and a 5508 WLC. The 5508 WLC only had one port connected to one of the 6509 units then we added another port on the 5508 to the other 6509. Do I need to add the IP and MAC address of the the second port of the 5508 to the existing Mobility Group?
Thanks for any help.
Jeff

When you adding mobility member you need to configure the Controller IP address & its MAC address (NOT the interface MAC address WLC connect to). Therefore in any connection type (LAG enabled or NOT) it has to be your 5508 controller IP address & its own MAC address.
If you type "show sysinfo" or "show mobility summary" on your 5508 you can get this information as shown below. Then you can add that onto your exisiting mobility group configuration of WiSM (you have to add WiSM detail on your 5508 mobility config as well)
(5508) >show sysinfo
Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 7.5.102.0
System Name...................................... 5508
IP Address....................................... 10.10.10.10
Burned-in MAC Address............................ 64:00:F1:F5:B0:80
Power Supply 1................................... Present, OK
Power Supply 2................................... Present, OK
(5508) >show mobility summary
Mobility Protocol Port........................... 16666
Default Mobility Domain.......................... dmz
Multicast Mode .................................. Disabled
Mobility Domain ID for 802.11r................... 0xe49d
Mobility Keepalive Interval...................... 10
Mobility Keepalive Count......................... 3
Mobility Group Members Configured................ 9
Mobility Control Message DSCP Value.............. 0
Controllers configured in the Mobility Group
MAC Address IP Address Group Name Multicast IP Status
64:00:f1:f5:b0:80 10.10.10.10 dmz 0.0.0.0
HTH
Rasika
***** Pls rate all useful responses ****

High Availability with two 5508 WLAN controllers?

Dear all,
we are considerung to implement a new wireless solution based on Cisco WLC 5508 and 1262N Access Points. We are planning to purchase about 30 access points and have two options: Either purchase one WLC 5508-50 or, for redundacy, two 5508-25 controllers.
Is it possible to configure two WLC 5508 as a high availability solution so all Access Pointes are distributed over both WLCs and in the case one WLC breaks the other one manages all APs?
If we have 30 access points and one of two WLC 5508-25 breaks of course not all 30 but only 25 access points can be managed by the remaining one. Is there some sort of control to choose which access points shall be managed and which not?
How does such a configuration look like in general, is the implementation of a two controller setup rather complex or straight forward?
Thanks!
Michael

Dear Nicloas,
thanks for your reply. We have an offer where two 5508-25 are only a little more expensive than one 5508-50. So I think it's better so spend a little more money and have a backup WLC. Otherwise, if the one and only WLC breaks, all APs are unusable which would not be acceptable for us.
Regarding roaming - not all access points will distribute the same WLAN. Actually we will have one wireless network with 18 access points for our warehouse and 12 access points for the internal and guests network.Therefore no roaming will happen between those APs. In this case I could use one WLC for the 18 warehouse access points and 12 for the internal network. In the case one controller breaks, I could use the remaining one for the important warehouse systems (i.e. by using the priority system).
Regarding the configuration: If I understand correctly I configure both controllers exactly the same (except for the name and IP address of course) and put both controllers in the same mobility group - and that's really it? Sounds great!
I have one general question regarding the new WLC controllers: Is it true that communication between the WLC and the APs is now done on Layer 3 only so all APs need an IP address? I'm asking because currently we are still using an Cisco 4112 WLC which operates in Layer 2 mode. So I guess with the new WLC, I have to configure DHCP option 43 with the management IP address of the WLC, right? I also guess I can manually move APs from one to another WLC once they have joined a controller for the first time?
I'm ordering the book "Deploying and Troubleshooting Cisco Wireless LAN Controllers" now and guess this will answer most of my upcoming questions. Can I come back to you here in case I run into trouble with the configuration?
Thanks a lot for your help
Michael
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Upgrading two 5508's in mobility group

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