Redundacy

[Daniel Ordóñez Flores]

Hello every one thanks for read me. I really sorry if my grammar is so bad but I'm not  native speaker. I read this topic before

https://supportforums.cisco.com/message/3722746#3722746 But I'm not sure if I can apply this situation in mi case.

I have one Controller 5508 is my Central Office and I have some Ap's working in local mode in my Central Office, additional I have more Ap's in a remote Office they're are working as H-REAP and I can handles across my WLC. Now my enterprise decided bouth another WLC and wants to deploy a active-passive scenario.

This new Controller should manages all the AP's when the central WLC fails... My questions are...

I need to have the same ip addressing on both sites? or they can be different?

I nedd to configure some on my Ap's that are working as local mode, for allow the secondary WLC manage them when mi central WLC fails?

I have several doubts about my ip addressing.

Thanks again for read.

[Scott Fella]

Well typically you have a primary/standby, but I like to have both running with AP's on them.  You would need licenses on the new WLC to allow the AP's to failover, or if you are running v7.4, you can do an N+1 with a WLC HA sku.

Anyways, the prefered method is to have both WLC's at the same location.  The ip address would not be the same but has to be unique.  Here is a doc that explains how redundancy works. 

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a008064a294.shtml

I wouldn't go with v7.4 and HA as it is not stable.  v7.4 using N+1 is okay and would cost less, but you have to make sure your AP's support v7.4.  You can find that info here:

http://www.cisco.com/en/US/docs/wireless/controller/5500/tech_notes/Wireless_Software_Compatibility_Matrix.html

Here is a link to v7.4 N+1

http://www.cisco.com/en/US/docs/wireless/technology/hi_avail/nplus1_deploy.pdf

Thanks,

Scott

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[Daniel Ordóñez Flores]

Thank you Scott:

Desafortunatly the WLC must be on different Office. I see the link that you send me and I really aprecciate it to much but I see the 2 WLC are on same subnet. The ip addressing are different one has 10.10.40.0/24 and the other office 10.10.71.0 /24

the procedure could be the same?

[Scott Fella]

Well it just makes it complicated, since your dynamic interfaces will be assigned in the other location and in a failure, the local AP will place user on the local subnet where the new WLC is placed.  So clients will of course bounce and have to obtain a new ip address after the AP's join the new WLC.

Thanks,

Scott

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[Daniel Ordóñez Flores]

Hello Scott.

I have a new scenario, now both WLC are in the same place... I think this is more easy, I have another question. I need to use the same ip addressing for my Dinamyc interface? and just need to change the managment addressing?

Thank your for your answer

[Scott Fella]

Ip address should be unique between any device including the WLC dynamic interfaces.  So yes make sure they are different.

Thanks,

Scott

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[Daniel Ordóñez Flores]

So... When my backup WLC becomes on the central WLC my user en X vlan will change their ip addressing? It means I need two squeme adressing for SSID?

[Scott Fella]

Both WLC's located on the same location should have a dynamic interface on the same subnet.  You are now placing both WLC's in the same location correct?

Thanks,

Scott

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[Daniel Ordóñez Flores]

Hello Scott yes... now both are in the same location let my try to explain better:

For Example  I have a SSID "guest"

In my central WLC I created an Interface called "guest" and its information is this:

Vlan Identifier: 6

Ip address : 10.10.10.2

Netmask: 255.255.255.0

Gateway:  10.10.10.254

Primary DHCP Server : 10.10.10.254

My question is in my secondary WLC I need to have this same values? or I need an Diferent values, I mean new:

Vlan Identifier:

Ip address:

Netmask:

Gateway

Primary DHCP Server

I really sorry If my grammar is awful

[Scott Fella · Accepted solution]

It would be like this

WLC1:

Vlan Identifier: 6

Ip address : 10.10.10.2

Netmask: 255.255.255.0

Gateway:  10.10.10.254

Primary DHCP Server : 10.10.10.254

WLC2:

Vlan Identifier: 6

Ip address : 10.10.10.3

Netmask: 255.255.255.0

Gateway:  10.10.10.254

Primary DHCP Server : 10.10.10.254

Thanks,

Scott

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[Daniel Ordóñez Flores]

Thank you so much Scott.