We've also loved vlan pooling, and the distribution of clients across
the /24's is excellent. As we start to see our vlans becoming highly
utilized, we simply add another /24 to the pool and slowly the
distribution evens out again, current users are not affected until
they disconnect and reconnect at which point they'll likely receive a
new vlan assignment, while new users immediately get hashed into the
new algorithm.
Garrett Harmon
Network Engineer
Office of Information Technology
The Ohio State University
614.292.2122 (o)
614.747.5539 (c)
On May 28, 2009, at 11:45 AM, Michael Dickson wrote:
We find that Vlan Pooling does a really good job at "balancing" the
users across our 24 client vlans. We have eighteen client vlans on
our main SSID and I'm impressed with the even distribution this
feature offers.
If you have multiple local controllers make sure that the client
vlans are properly configured on each controller for both L2 and L3.
This will ensure that the clients can roam across "controller
boundaries" with the same IP address.
Also, we found it helpful to size each client vlan/subnet the same
(again we use /24 subnets)
Hope this helps.
Mike
*******************************
Michael Dickson
Network Analyst
University of Massachusetts
Network Systems and Services
********************************
Ken Connell wrote:
Assuming you you have multiple client side vlans already configured
on your controller, you assign those vlans to the vap (currently
your only specifying one vlan, just comma seperate and add
another ). Now when a user associates, there is hash done on the
client mac address and they are placed in a vlan based on the
output of the hash.
That mac will always hash out the same, and they will therefore
always be put into the same vlan.
Just be careful if you have any static clients or use reserved
DHCP, cause once you add another vlan to the pool, they'll more
than likely hash out to a diff vlan and therefore require a diff IP
of course....
We've been using that since it was available and have no complaints.
Ken Connell
Intermediate Network Engineer
Computer & Communication Services
Ryerson University
350 Victoria St
RM AB50
Toronto, Ont
M5B 2K3
416-979-5000 x6709
------------------------------------------------------------------------
*From*: Jason Appah
*Date*: Thu, 28 May 2009 08:16:07 -0700
*To*: <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
*Subject*: [WIRELESS-LAN] ARuba VLAN pooling
What is this VLAN pooling? How does it work? **********
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