Alcatel Unleashed

Anyone still using old alcatel lucent OS6250? I'm having some troubles trying to config an aruba IAP (505) on it, I've made this config on port 1/1 and 1/26

vlan 1
Vlan 5 enable name data
vlan 5 port default 1/2-24
vlan 10 enable name corp_wifi
vlan 12 enable name mngm
vlan 12 port default 1/1
vlan 20 enable name Free-internet

#IAP_port
vlan 10 802.1q 1/1 "TAG PORT 1/1 VLAN 12"
vlan 20 802.1q 1/1 "TAG PORT 1/1 VLAN 20"

#trunk_port
vlan 5 802.1q 1/26 "TAG PORT 1/26 VLAN 5"
vlan 10 802.1q 1/26 "TAG PORT 1/26 VLAN 10"
vlan 12 802.1q 1/26 "TAG PORT 1/26 VLAN 12"
vlan 20 802.1q 1/26 "TAG PORT 1/26 VLAN 20"

but when I connect the router on the trunk port, I got lot of pings timeout, and the network is unstable. Can some one tell me what am I doing wrong?
thank you

System :
Alcatel-Lucent OmniSwitch 6250
Software Version 6.6.4.177.R01 GA, May 24, 2013.

Timeouts where? Is the Aruba Access Point lightweight and do you have a node that distributes configuration?

On all devices, independently from the vlan, on computers connected to vlan 5, the management network (vlan 12), on vlan 10 corp_wifi, and vlan 20 free-internet. for every 10 pings, I got 4 or 5 timeouts

So there's most likely a loop, I'm guessing the AP is not properly configured.

I found the problem. just made this change -> it was on after that I stop getting packets loss