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Occasional Contributor I

Reduce AP-Controller Discovery Time - DHCP Option 43/60

I have a general inquiry regarding DHCP Option 43 and Option 60. I want to reduce the AP-Controller discovery time during a controller reboot. Both the Controller and APs are on a dedicated VLAN segment. The controller mgmt IP address is statically assigned. All Access Points are setup with DHCP Reservations. In addition, each Access Point is whitelisted(factory-cert/certified-factory-cert) and assigned to the appropriate VAP.

 

If I configure DHCP Options 43 and Option 60, would I see a noticable difference reduction/improvement in the AP-Controller discovery time during a controller reboot? 

Re: Reduce AP-Controller Discovery Time - DHCP Option 43/60

Not really no, DHCP Opt43/60 is part of it coming up and the Master IP comes with the AP IP assignment. DNS is done immediately after DHCP so maybe a second savings by using DHCP Opt43/60. 

 

If you need to persist APs during a controller reboot, you would want a second controller for the APs to fail over to (would not be hitless). If during an upgrade, you would want an MM and at least a 2-controller cluster and use the ISSU/Live Upgrade capability of the 8.x AOS (would be hitless). 

Jerrod Howard
Sr. Technical Marketing Engineer
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