https://community.cisco.com/t5/wireless/wireless-lan-controller/m-p/2510701#M148013 <P>Hello,</P><P>In our company we have a cisco wireless lan controller. the managemant interface (untagged 192.168.10.240) is able to ping to all te vlan's. When i add a interface (for example vlan 20 voice 192.168.20.240 255.255.255.0 192.168.20.254) i cant ping that network anymore from my controller while the ip and vlan configurations are good. Can someone help me to solve this problem?</P> Mon, 05 Jul 2021 08:01:58 GMT evanderwal 2021-07-05T08:01:58Z https://community.cisco.com/t5/wireless/wireless-lan-controller/m-p/2510701#M148013 <P>Hello,</P><P>In our company we have a cisco wireless lan controller. the managemant interface (untagged 192.168.10.240) is able to ping to all te vlan's. When i add a interface (for example vlan 20 voice 192.168.20.240 255.255.255.0 192.168.20.254) i cant ping that network anymore from my controller while the ip and vlan configurations are good. Can someone help me to solve this problem?</P> Mon, 05 Jul 2021 08:01:58 GMT https://community.cisco.com/t5/wireless/wireless-lan-controller/m-p/2510701#M148013 evanderwal 2021-07-05T08:01:58Z https://community.cisco.com/t5/wireless/wireless-lan-controller/m-p/2510702#M148014 <P>Because you have more than one VLAN, you need to TAG the uplink. &nbsp;On the switch you need to enable Dot1Q Trunking and allow the required VLAN.</P> Wed, 18 Jun 2014 09:13:00 GMT https://community.cisco.com/t5/wireless/wireless-lan-controller/m-p/2510702#M148014 Leo Laohoo 2014-06-18T09:13:00Z