I mis-remembered.  I did some testing with vlan 1 a while back.  The results are below.   The problem is vlan 1 is handled differently between PowerConnect models and also differently from Cisco.  My suggestion is stil to use general mode. PowerConnect 62xx,8xxx,M6xxx,M8xxx:   PowerConnect 33xx, 34xx, 35xx, 53xx, 54xx, 60xx   Cisco
Hi, Can anyone outline the difference between the trunk mode and general mode for VLAN support and the pros/cons of each mode? We have two PowerConnect 6248 switches interconnected with a LAG (2 x 10GbE) and we need to VLAN support for the LAG between the two switches and also a couple of other LAGs (2 x 1GbE) to older PowerConnect 5324 switches. We have about 10 different VLANs. We're not sure if we should use trunk mode or general mode for the LAGs. Thanks.
VLAN support: trunk mode vs general mode