We have a large number of 1240ag Aironet access points which have been working just fine with IOS 12.3(8)JEA2 and we are able to establish PPTP connections to our Cisco VPN 300 Concentrator.
However, when I upgrade to 12.4 (tried 12.4(3g)JA1 and 12.4(10b)JA) the PPTP no longer works. All other communication is fine and I can establish an IPSEC VPN back to the VPN concentrator.
A packet capture shows the PPTP control packets are being exchanged fine, but the GRE packets seem to be re-sent from both sides continuously until the VPN client times out while showing "Verifying username and password". The concentrator see's a tunnel establishment request, but the GRE tunnel doesn't come up sucessfully and then PPTP closes the connection.
Have there been some major changes to the IOS featureset which is causing this problem? None of the configurations for any devices on the network have been changed.
Transferring Crash file from standby:
Login to the Active WLC in HA.
(Cisco Controller) >transfer upload datatype crash
(Cisco Controller) >transfer upload filename <Desired filename>
(Cisco Controller) >transfer up...
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 ...
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.
Powershell SNMP Module (Install-Module -Name SNMP)
SNMP Write Access to...