WLC Redundancy Question

Hi Community,
I have one question regarding the redundancy feature for two WLC 2106. We have installed on a customer site 2 WLC's 2106 and 6 AP's. Primary and Backup WLC works fine. No the customer asks the question if there is a option to copy the guest access wlan user from the primary controller to the backup controller? The lobby user activates a new user on the primary controller and if the primary controller fails, then the user did not get access to the wlan guest network.
Any ideas?
Thanks for help.
Rene

Hi Jerry,
Mobility - it's used for client so that they can roam without any issue and one tunnle will be stablish between wlc-1 and wlc-2. if wlc-1 goes down the client will be local to the wlc-2 and if the guest user is not present on wlc-2 then it will not be able to access network.
HA for AP - primary, secondary are used to achieve this.
HA for WLC (WLC redundency) - suppose you have two WLCs if one goes down then second will start serving without any issue. For that master wlc will push all the config to second wlc and some other mechanism to achieve this. This functionality is not yet support.
Thannks

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WLC Redundancy over L3 link

Hi All,
Is it possible to deploy WLC redundancy over L3 link???
In our scenario we have 2 controllers located in 2 different sites, the link between the site is L3. AP's are deployed across four other locations, two are coming to site 1 and rest two are coming to site 2 . How can i make redundancy on this setup , Please advice
Controller is 4404 and AP's are 1231G series .
Regards
Aslam ...

What is your link between each site? Also, I suppose your ap's are running in H-REAP mode? If you don't have enough bandwidth, then you shouldn't try it. You can always try to move the ap's to either wlc and see if users have any issues or not, before you try to deploy redundancy in this matter.

Centralized WLC Design Question

Dears,
In my scenario, i am designing CEntralized WLC deployment. I have 30 AP in Buidling X(200 Users) and 20 AP in Buidling Y(150 Users). I am planning to install HA WLC CLuster where Pimary & Secondary WLC will reside in physically different Data Centers A & B.
I have a wireless Design Question and i am not able to get clear answers. Please refer to the attached drawing and answer the following queries:
If Buidling X users want to talk to building Y Users, then how Control & Data Traffic flow will happen between Buidling X & Y. Would all the traffic will go to Primary WLC from Bldg X APs first and then it will be Re Routed back to Buidling Y APs? Can i achieve direct switching between Bldg X&Y APs without going toward WLC?
If Building X & Y Users want to access the internet, how would be traffic flow? Would the traffic from X&Y AP will go tunnel all the traffic towards WLC and then it will be routed to internet gateway?is it possible for Bldg X&Y AP to directly send traffic towards Internet Gateway without going to controllers?
I have planned to put WLC at physically different locations in different DC A & B. Is it recommended to have such a design? What would be the Failver traffic volume if Primary WLC goes down and secondary controller takes over?
My Reason to go for Centralized deployment is that i want to achieve Centralized Authentication with Local Switching. Please give your recommendations and feedback
Regards,
Rameez

If Buidling X users want to talk to building Y Users, then how Control & Data Traffic flow will happen between Buidling X & Y. Would all the traffic will go to Primary WLC from Bldg X APs first and then it will be Re Routed back to Buidling Y APs? Can i achieve direct switching between Bldg X&Y APs without going toward WLC?
Traffic flows to the WLC that is the primary for the AP's, then its routed over your network.
If Building X & Y Users want to access the Internet, how would be traffic flow? Would the traffic from X&Y AP will go tunnel all the traffic towards WLC and then it will be routed to Internet gateway?is it possible for Bldg X&Y AP to directly send traffic towards Internet Gateway without going to controllers?
The WLC isn't a router, so you would have to put the Internet traffic an a subnet and route.
I have planned to put WLC at physically different locations in different DC A & B. Is it recommended to have such a design? What would be the Failover traffic volume if Primary WLC goes down and secondary controller takes over?
Like I mentioned... earlier, the two HA WLC has to be on the same layer 2 subnet in order for you to use HA. The guide mentions an Ethernet cable to connect both the HA ports on the WLC.
Thanks,
Scott
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5508 WLC redundancy issue.

I am trying to set up fail-over for Cisco 5508 Wireless LAN Controller which is using 7.4 version software. I setup the redundancy port and peer redundancy.
While checking,one becomes active and other becomes standby.
Its showing everything perfectly including peer,standby-hot etc.(XMLs matched also)
I disconnect the 1st WLC uplink and then the Stand by becomes active. Fine.
Later i connected the 1st WLC link and disconnect the 2nd WLC (currently active). Here comes the issue.
Then other WLC is not becoming Active and it enters in to Maintenance mode. Means Down.
why this issue happens?
One thing i need to highlight is, one WLC is having 50 AP basce license count and other WLC having 250 AP base license count.
Is this will be an issue? Whether the License count should be same on both?
If so,how can i trim-down 250 to 50 AP base license?
Any clues? Help me!

You don't have trim down the license. The license amount is going to be what you have on the primary. As far as failover the way your doing it, I don't thinkers supported that way. Only a hard failure. So you will have to manually switch the primary back.
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WLC Redundancy after RMA

Hi,
after an RMA i installed a new WLC 5508.
Now i want to pair the new controller with the old one to the HA mode.
The Controllers are in SSO mode.
IP Adressing of both controllers are ok but the Mobility MAC Adress on the new Controller is not right and i can't change it.
How can i pair the both Controllers via CLI or GUI?

You have the flexibility to configure a custom MAC address as Mobility MAC instead of using the default behavior of using the Active WLC MAC address as Mobility MAC. This can be done using the configure redundancy mobilitymac <custom mac address> command on the Active WLC. Once configured, you should use this MAC address on other controllers in order to form a mobility peer instead of using the Active WLC MAC address. This MAC address should be configured before forming the HA pair. Once the HA pair is formed, the Mobility MAC cannot be changed or edited.
http://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/7-5/High_Availability_DG.html#pgfId-104930

WLC redundancy with prime

Hi all,
We are going to implement high availabilty in 5508 WLC with version of 7.3.101 . We will be using Prime infrastructure 1.2 for monitoring purpose.
With Prime , whether we can monitor and manage redundant WLC also or only active WLC?...
Thanks for your help.......

I just know from experience. You can only GUI/ssh into the primary WLC when you enable AP-SSO. So once the pairs are in HA, that is it.... You have only the primary WLC IP address available. You learn things the hard way sometimes because there are things not documented.
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WLC license question

We have two 7510 WLC's and a bunch of AP's. I want to make sure I understand the license impact of what we are trying to do. Our AP's will not be up at all times and it's impossible to know when these AP's will be connected and booted up. They may be on for 2 days and then off for a month before booting up again. The question I have is once an AP registers to a WLC, is that license 'locked' and used regardless of whether the AP is up or not?

I agree with Steve and Vikas.
The WLC calculates the license for currently connected APs. The AP that joins the WLC consumes the 1 space in the WLC license once it is connected. Once it is disassociated you can simply bring another different AP and connect it.
Same way, if you have a license for 100 APs, it is possible that you connect 100 APs then remove them and bring different 100 APs and they should join without a prblem.
Regards,
Amjad
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Wlc ha question

hi all ,
our primary wlc has failed and we received a new one from rma.
Now If I set ha between the new wlc and existing one.will existing wlc push up configuration to new wlc (primary)?
release 7.4
thanks in advance

High Availability in Release 7.3 and 7.4
The new architecture for HA is for box-to-box redundancy. In other words, 1:1 where one WLC will be in an Active state and the second WLC will be in a Hot Standby state continuously monitoring the health of the Active WLC via a Redundant Port. Both the WLCs will share the same set of configurations including the IP address of the Management interface. The WLC in the Standby state does not need to be configured independently as the entire configuration (Bulk Configuration while boot up and Incremental Configuration in runtime) will be synced from the Active WLC to the Standby WLC via a Redundant Port. The AP's CAPWAP State (only APs which are in a run state) is also synced, and a mirror copy of the AP database is maintained on the Standby WLC. The APs do not go into the Discovery state when the Active WLC fails and the Standby WLC takes over the network's Active WLC.
There is no preempt functionality. When the previous Active WLC comes back, it will not take the role of the Active WLC, but will negotiate its state with the current Active WLC and transition to a Standby state. The Active and Standby decision is not an automated election process. The Active/Standby WLC is decided based on HA SKU (Manufacturing Ordered UDI) from release 7.3 onwards. A WLC with HA SKU UDI will always be the Standby WLC for the first time when it boots and pairs up with a WLC running a permanent count license. For existing WLCs having a permanent count license, the Active/Standby decision can be made based on manual configuration.
http://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/7-5/High_Availability_DG.html#pgfId-74573

WLC Redundancy

Hello,
I have 2x WLC 5508 running version 7.2
1st one is setup and running.
My questions is: If I want to setup Active-Passive redundacy, do I need to manually setup the 2nd one exactly as the 1st one and put them in the same group?
Or is it a way to copy all of the configs I made on the 1st one over to the 2nd one?
Thank you.

I would setup the first WLC and then do a config backup via TFTP or FTP. Once you have that config backed up you can then apply it to the second WLC. From here you will need to change the IP and WLC name of the second WLC so it doesn't conflict with the first.
Also, if you want it to be a true Active-Passive then you will want to make sure that all of your APs are configured with primary and secondary controllers.

WLC redundency

Hello I have 2 WLC: a 2504 and a 5508, can one be the backup of the other?
How do i configure such settings?
I want a automatic backup when 1 is down (the primary would be the 5508) it will switch automaticly to the2504?
Thanx for your advice.
B

Just another questions not very important but still:
Is it possible to change all APs in 1 shot? instead of 1 by 1?
in the version 7.0.x i have a HA settings in Wireless,Access Points, Radio, Global Configuration.
Can someone explain me what it is for, there is the following field:
AP Heartbeat Timeout(1-30)
Local Mode AP Fast Heartbeat Timer State
Disable Enable
Local Mode AP Fast Heartbeat Timeout(1 to 10)
H-REAP Mode AP Fast Heartbeat Timer State
Disable Enable
H-REAP Mode AP Fast Heartbeat Timeout(1 to 10)
AP Primary Discovery Timeout(30 to 3600)
Back-up Primary Controller IP Address
Back-up Primary Controller name
Back-up Secondary Controller IP Address
Back-up Secondary Controller name
Tx a lot for the answer.

WLC Failover Question

Hi All
Can anyone give me a definitive answer to this question please?
If you are using a pair of wireless LAN controllers configured with primary and secondary controllers for the access points and the primary controller fails - do the access points reboot before associating to the secondary controller. I can't see why they would need to but documentation suggests they do.
Additionally, has anyone significantly reduced the failover time? If so, what is the lowest practical failover time. I know the actual failover time can be reduced to 3 seconds but I think that is likely to cause other problems.
Thanks guys.
Regards
Roger

As far I know, In this case the AP does not reboot, only changes its lwapp status to discovery and begins with the discovery proccess.
You can see in the AP if it is restarted; when it places registered in the second WLC, Wireless tab and select the AP affected; normaly in the first tab you can see bottom right the AP up time and the AP association time; if this AP has rebooted this value will close to 00:00.
Normaly I set the Ap heartbeat timeout to 5 seconds, I don´t know if is the best value and my failover time is bigger than your, I don´t know how critical are your network, but a prefer a higher heartbeat timeout to avoid unnecessary AP changes that spend more time.
Best Regards.

2100 WLC Redundent LAN Uplinks?

Hi,
In the data sheet for the 2100 it states that "Provides eight 10/100 Ethernet ports, intended to support a combination of access points and redundant LAN uplinks"
http://www.cisco.com/en/US/prod/collateral/wireless/ps6302/ps8322/ps7206/ps7221/product_data_sheet0900aecd805aaab9.html
My question is.. How do you configure the redundent uplinks as aparently the 2100 doesnt support LAG (Link aggregation)..
Any ideas?
Many Thanks

Excellent, Thanks.
So i can uplink the primary and backup ports to seperate switches?
I'm thinking that i would home all interfaces to the same priamry and backup ports and then uplink each port to a different switch. There isnt really a need to try and load balance as the traffic volumes are quite low.
What do you think?

WLC Redundancy - Disaster Recovery

My questions is in relation to disaster recovery, for wireless. We have our main data center, in the US, with two 5508 controllers. We have a DR location, in Europe, with two 5508 controller. We're upgrading our 5508's to the 7.4 code, so that we can take advantage of the RP port for our controllers. With that said, is there a way to make the US and Europe controllers redundant? If there's a disaster, in the US, would the AP licensing, and AP's attach to the European controllers? Our AP's are set up with HA. I'm more concerned about the licensing flipping over to the DR controllers. I've tried researching this topic, and can't really find anything on it. Thanks!

If you can't use the RP port and configure SSO, then yes you need to have adequate licensing to support all the AP.
But if the AP fall from one DC to another, are the clients going to get the same IP? Failing across DC is most effective when you use FlexConnect, IMHO.
HTH,
Steve
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IDSM placement and redundancy question

Hi, Does the IDSM-2 support any sort of redundancy protocol?
I can't see anything in the config guide.
If I wanted to place a redundant pair on the outside of a pair of firewalls, how would I manage the redundancy of them.
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These are two IDSM-2s connected to slot four and give of the same chassis. We are running FWSM >> MSFC OUTSIDE setup. All InterVLAN traffic is evaluated first by the IDSM than by the FWSM. Users default gateway is the FWSM.
Here you go:
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intrusion-detection module 5 data-port 2 channel-group 6
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Regards
Farrukh

SIP Redundancy Question

Hello,
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Ed Vazquez

Hi,
Wrong forum. You need to move this question to IP Telephony forum...
Regards
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MDGDP, CCNA, CCNA Voice certified

WLC Redundancy Question

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