Hello,   We are facing a very weird issue here, let me clarify it:   1. We have some Citrix VDI users here, they use HP thin clients to connect to the server end virtual machines. The structure is like:  Thin Clinet ----- Access Switch ------ Core Sw...

Hello All, We are running CUCM 8.5 and we meet a problem here: We have a Phone (let's name it P_A) in site A, we set CFA of this phone to a external mobile, then the result is as below: 1. Call internally from Phone_B in site A -> OK 2. Call inte...

Hello Guys, We meet a problem on the HSRP between our two core switches whose model is WS-C3750X-12S-S with IOS version 15.0(2)SE4 on both sides. We found that the HSRP of all the VLANs are flapping all the time every hour with an example as below:...

Hi Guys, We have 2 WISMs here and one WLAN connected to interface "Int1" and they are working fine. For now, we want to expand the IP addresses of this SSID, so we created several VLANs as well as some interfaces in WLC and created a interface group ...