Yes you can. A WLSE Express can handle 50 AP's (upgradable to 100). A full WLSE can handle several hundred (at least) APs. You'll need at least one WDS AP on each subnet (best to make it a dedicated AP if you're supporting lots of wireless users, shut it's radio down) and using an ACS server for authentication is also a good idea.
Yes you can use the WLSE over the WAN. If you are not pushing SNMP over your WAN you will need to SEED every IP Address of Every Device (out on your WAN) that you would like to manage. over a 256k link you might see some pretty insane latency when you are pushing new IOS images, but it will work! I would also suggest using SSH rather than Telnet to manage the devices. if you need any other assistance let me know! I have worked with the WLSE, the WLSM and all of Cisco's Controller based products sence the begining!
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
This is the start of a display filter cross reference between Wireshark
and OmniPeek. The 1st installment is a table of advanced filters. More
filters will be added as time allows. It is a living doc, so check back
for changes every so often Please feel f...
I have created a Powershell script to automatically add a Wireless Guest
User on Cisco WLCs. (tested on 2500 Series) The script should be
completely self explanatory. Prerequisites: Powershell SNMP Module
(Install-Module -Name SNMP) SNMP Write Access to y...