Aruba - Controllers

Aruba networks are providing wireless controllers like 3600
what is the exact purpose of these controllers & what function they offer.
How exactly they differ from the access points ?
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SrikantRajeevAsked:
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Jakob DigranesSenior ConsultantCommented:
Aruba Controllers - as other brands of controllers - serve as a single point of configuration and monitoring of access points.
Aruba have som stand-alone APs (Instant APs) - but all other APs will not function without a controller. When the AP boots it looks for the controller (on the same network as the AP, either L2 or L3), and asks for its configuration - when controller accepts the AP as one of its own - it will push configuration to the AP which then completes boot and start serving clients.
The benefit is that you can change configuration on all APs from just one location, you can troubleshoot connectivity and performance problems from one location, as opposed to do this one time on every AP you've got.
You will also get better use of radio spectrum since the controller controls all APs and can dynamically change channels all the way.

When buying Aruba controllers look at how many APs they can serve at max. The MBC 650 have 16 APs max, and if you need 17 - you need to buy MBC 3200 - you cannot upgrade a controller beyond its AP limit.
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SrikantRajeevAuthor Commented:
thanks
I have few clarifications.
For making any changes to any AP do i need to make changes at the controller & then push the configuration to the AP or i can make changes to the AP directly.

Do controller have all the configuration backup of the APs.?
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Jakob DigranesSenior ConsultantCommented:
Yes - you can do very little on APs - All you can do on APs is clear configuration. All settings is done on controller - which instantly push these to APs
COntroller has all configuration for all APs. Need a new AP - connect it and a couple of minutes later, it's configured and up and running
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SrikantRajeevAuthor Commented:
do any one has the feature comparison between Aruba wireless network & Cisco wireless network solution.
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Jakob DigranesSenior ConsultantCommented:
only from a sales persons view - and not favorable for Cisco.

I can give you some of the benefits of Aruba Networks - but haven't worked with Cisco for several years, and have too little knowledge of their features.

Aruba Networks
here are some features ...

- one point for management via Controller - can also deploy Master - Local controllers if you have several Sites
- APs can connect to controller on both L2 (same VLAN) and L3 - ip-routable network
- integrated stateful firewall (requires PEFNG license)
- role based access for users
- support integrated, Radius, LDAP and TACACS authentication (802.1X)
- Advanced radio and spectrum analyzer and control
- Wireless intrusion, Rogue detection and enforcement (requires WIP license)
- Monitor connected clients on username, role and active sessions
- Site-to-Site VPN client
- Client VPN server (VIA Client)
- Remote Access Point - possible to connect access points to controller via WAN (Throug automatic IPSec VPN)
- end to end encryption
- integrated guest portal
+ + +
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SrikantRajeevAuthor Commented:
Thanks
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