December 18, 2012 3:08 PM updated: December 18, 2012 3:09 PM

I can't say for sure. My setup's different. I have a 3500Lv2 with Shibby's 102 installed running in fairly standard mode as the primary, then a Rosewill RNS-N150RT running Brainslayer's 10/12/12 (i.e. Dec. 12) beta of DD-WRT as the secondary in a "repeater bridge" arrangement (pretty much following the recipe here: http://www.dd-wrt.com/wiki/index.php/Repeater_Bridge) Some devices will roam on their own between the two - an Android phone, a Linux netbook - but then a Macbook Air so far seems content to stay with the primary as long as it can reach it. And even the devices that roam automatically wait until the first AP they connected to is nearly out of range.

In any case, I think it's necessarily up to the devices whether and when to roam to a second AP, not up to the APs. So if there's anything that's tunable about this, that might be where to look.