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Regular Contributor I
Posts: 232
Registered: ‎01-19-2013

Problems with DHCP on Controller

Hello community,

 

I´ve a probleme, I´ve installed 2 7000 Controller in a Master/Standby configuration.

The controller have the software version 6.3.1.6 installed.

I´ve configured an ap vlan where the access points on it. For this Vlan ist the Controller the DHCP Server.

When I want to remove a exclude range I´ve got the following message:

On cli the same message.

 

123.JPG

 

 

What happens when the master controller gets down?

The dhcp config don´t sync to the backup right?

 

What happens on a failover or failback?

 

thanks.

 

 

MVP
Posts: 1,415
Registered: ‎10-25-2011

Re: Problems with DHCP on Controller

It seems as though you are maxing out your DHCP address range.
I believe you would need to create the same scopes on the backup, I am unsure if that syncs or not
Pasquale Monardo | Senior Network Solutions Consultant
ACDX #420 | ACMP
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Guru Elite
Posts: 20,773
Registered: ‎03-29-2007

Re: Problems with DHCP on Controller

The scopes are not synched.  You should use an external DHCP server for maximum flexibility.



Colin Joseph
Aruba Customer Engineering

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Regular Contributor I
Posts: 232
Registered: ‎01-19-2013

Re: Problems with DHCP on Controller

Ok, I see the scopes are not synced, but the costumer wan´t to user the controllers dhcp function.

Is there no way to get this work on master/standby ?

Guru Elite
Posts: 20,773
Registered: ‎03-29-2007

Re: Problems with DHCP on Controller

If you want to use more than 512 addresses, you should use an external DHCP server.

If you want the full use of all your addresses without having to carve out duplicate addresses on the opposite controller, you should use an external dhcp server.

If you want your clients to be able to use the same addresses upon failover, you should use an external DHCP server.

 

The internal DHCP server has a limit of 512 addresses

It is not synched between controllers, so you would have to cave out addresses that are served up on each controller and your capacity gets halved upon failover.

Your best bet is to prepare to use an external dhcp server.

The internal dhcp server on the controller is only intended to be used for guest traffic.



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

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