With the PowerConnect devices you will need to have a trunk switchport mode on any ports that are connecting to another switch/router. Trunk Links attach two VLAN aware switches (or other VLAN aware devices) together and allows for multiple VLAN frames to cross one link.  On VLAN trunk links, all frames must be tagged with the respective VLAN ID’s The native VLAN must match on all switches in the segment. (VLAN 1 is default Native VLAN).  The native VLAN is NOT tagged. console# configure  console(config)# interface ethernet e11 console(config-if)# switchport mode trunk  console(config-if)# switchport trunk allowed vlan add 100  console(config-if)# end Here are a couple sites discussing the interopability of PowerConnect and Cisco. networkerslog.blogspot.com/.../dell-powerconnect-vlan-trunk.html uminac.com/.../vlan-trunking-cisco-vsdell Hope this helps, Keep us updated if you can.
Hello, I have PowerConnect 5424 switch: Nov  6 18:44:43.250: %LINK-5-CHANGED: Interface GigabitEthernet1/0/1, changed state to administratively down Nov  6 18:44:44.256: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to down Nov  6 18:44:48.157: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down Nov  6 18:44:48.677: %SPANTREE-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk GigabitEthernet1/0/1 VLAN104. Nov  6 18:44:48.677: %SPANTREE-7-BLOCK_PORT_TYPE: Blocking GigabitEthernet1/0/1 on VLAN0104. Inconsistent port type. Nov  6 18:44:50.531: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up Nov  6 18:44:51.537: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up Nov  6 18:46:22.861: %SPANTREE-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk GigabitEthernet1/0/1 VLAN1. Nov  6 18:46:22.861: %SPANTREE-7-BLOCK_PORT_TYPE: Blocking GigabitEthernet1/0/1 on VLAN0001. Inconsistent port type.  How I have to configure port on poweconnect to make it work?  Thanks Zigmunds
Powerconnect 5424 access port poroblem