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Mobility Groups and High Availability with WLC 5508s and 1240 APs

I have some questions about mobility groups and high availability in the context of WLC 5508s and 1240 APs.  We have two 5508s with identical images and licenses deployed in our environment.  A mobility group has been configured between them and it is up and running.  The configs are nearly identical; the only exception being the IP addresses associated with the interfaces.  There are 23 APs in our environment, and all are registered with the primary WLC.  I have configured HA on the HA tab of all the APs registered with the primary WLC.  All of the APs are operating as lightweight APs.  None of the APs have registered with the secondary WLC.  Here are my questions:

1.  Should the APs register with both WLCs given the above scenario?

2.  If the APs do not register with both WLCs, what needs to be done to get them to register with the second WLC?

3.  Will the APs register with the second WLC only if the primary fails? 

4.  Is there a way to verify the HA config prior to a failover test?

Thanks in advance for any information you can provide.  If you have a link to documentation that explains the relationship between mobility groups and HA, please post it.  I checked CCO, but could not find any such document. 

Regards,

MB

PS:  Here are the pertinent sections of the WLC config

(Cisco Controller) >show mobility summary

Symmetric Mobility Tunneling (current) .......... Enabled

Symmetric Mobility Tunneling (after reboot) ..... Enabled

Mobility Protocol Port........................... 16666

Default Mobility Domain.......................... HPS_Mobility

Multicast Mode .................................. Enabled

Mobility Domain ID for 802.11r................... 0x2685

Mobility Keepalive Interval...................... 10

Mobility Keepalive Count......................... 3

Mobility Group Members Configured................ 2

Mobility Control Message DSCP Value.............. 0

Controllers configured in the Mobility Group

MAC Address        IP Address       Group Name                        Multicast IP     Status

44:d3:ca:b7:26:00  172.21.1.19      HPS_Mobility                      239.255.255.21   Up

e0:5f:b9:46:10:c0  172.21.1.18      HPS_Mobility                      239.255.255.21   Up

(Cisco Controller) >show ap config general HPSP_AP_4EC

Primary Cisco Switch Name........................ hps_wireless_ctr01

Primary Cisco Switch IP Address.................. 172.21.1.18

Secondary Cisco Switch Name...................... hps_wireless_ctr_green

Secondary Cisco Switch IP Address................ 172.21.1.19

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Silver

Mobility Groups and High Availability with WLC 5508s and 1240 AP

1. Should the APs register with both WLCs given the above scenario?

No, only the primary WLC you set in the HA

2. If the APs do not register with both WLCs, what needs to be done to get them to register with the second WLC?

You just need to make sure the mobility is up, which it is and that AP Fallback is enabled on both WLC

3. Will the APs register with the second WLC only if the primary fails?

That is correct

4. Is there a way to verify the HA config prior to a failover test?

You can change the primary WLC to point to the other (secondary) WLC.

Here is a good doc.

http://www.cisco.com/en/US/docs/solutions/Enterprise/Mobility/emob41dg/ch2_Arch.html

-Scott
*** Please rate helpful posts ***
3 REPLIES
Hall of Fame Super Silver

Mobility Groups and High Availability with WLC 5508s and 1240 AP

1. Should the APs register with both WLCs given the above scenario?

No, only the primary WLC you set in the HA

2. If the APs do not register with both WLCs, what needs to be done to get them to register with the second WLC?

You just need to make sure the mobility is up, which it is and that AP Fallback is enabled on both WLC

3. Will the APs register with the second WLC only if the primary fails?

That is correct

4. Is there a way to verify the HA config prior to a failover test?

You can change the primary WLC to point to the other (secondary) WLC.

Here is a good doc.

http://www.cisco.com/en/US/docs/solutions/Enterprise/Mobility/emob41dg/ch2_Arch.html

-Scott
*** Please rate helpful posts ***
New Member

Mobility Groups and High Availability with WLC 5508s and 1240 AP

Scott,

Thank you for the quick, correct response.  I changed the primary WLC on the HA tab of one of the APs and it registered with the secondary almost immediately.  Thanks also for the link to the doc.

Regards,

mb

Hall of Fame Super Silver

Mobility Groups and High Availability with WLC 5508s and 1240 AP

No problem... at least you know it works:)

-Scott
*** Please rate helpful posts ***
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