Our classic example is accessing iTunes between computers co-located near one another. Unless they both end up on the same VLAN they won't see one another without other "fix-up's" in place. This has been one of the concerns we have had with moving to pooling since our students (and staff for that matter) are likely using this "feature" today.
Thanks! David On May 28, 2009, at 12:06 PM, Johnson, Bruce T wrote:
Thanks Philippe, Certainly a nice option to have. --Bruce JohnsonFrom: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU ] On Behalf Of Philippe HansetSent: Thursday, May 28, 2009 2:26 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] ARuba VLAN pooling Bruce, VLAN pooling is the default assignment method. On top of that you still have MAC address assignment, 802.1x, Portal based identity... Does that answer your questions? Philippe On May 28, 2009, at 12:59 PM, Johnson, Bruce T wrote: Thanks Philippe,Is load-balancing the only algorithm available for this method of VLAN assignment?--Bruce JohnsonFrom: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU ] On Behalf Of Philippe HansetSent: Thursday, May 28, 2009 12:56 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] ARuba VLAN pooling If my memory serves me well, there is a capacity caveat to Aruba's VLAN pooling at the moment: (might change in a future code release) 1 SSID = 1 VAP = 1 Pool = Max 32 VLANsSo if you use /24, a maximum of 8096 ((256 - 3(gateway, network, broadcast)) * 32) users is the limit for one SSID.Not too many places have to worry about exceeding this number, but it's good to keep in mind! Philippe Univ. of TN On May 28, 2009, at 12:34 PM, Garrett Harmon wrote: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 poolingWhat is this VLAN pooling? 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