Thanks for the info. Iv'e already noticed that the behavior was different configuring trunks between the pc55xx and the pc62xx but thanks for clarifying. I managed to solve my problem. It wasn't nothing wrong with the config, (I think). I noticed that the laptops I was using for testing had TrendMicro client installed and blocking the traffic. As soon I unloaded it, vlans started to flow through the trunk. Well actually I upgraded the PC55xx from 4.0.1.11 to 4.0.1.12 and changed the vlan configuration on the client ports from switchport general to switchport access aswell. The PC 62xx has fw 3.3.2.3 and that's the latest til today. But I still think my problem was the trend micro client all along. Hope this help anyone.
Dear All, I buyed a PowerConnect 5548 and 6248 switch, I config these two switch as below config, and the PC1 on 5548 can not ping from 5548 vlan100 to 6248 vlan100, Event though, PC1 can't ping the vlan 100 interface on 5548. I set the 5548 1/0/2 port to General mode, could you help me to check what is the problem?  Here is the topology about my test: --------------------------------------------------------------------------------------- 6248 Switch (Vlan100 , Vlan101)        |1/g1         |   (Trunk mode , allow vlan 100-101)        |        |1/0/1 5548 Switch (Vlan100 , Vlan 101)        |1/0/2        | General Mode, allow vlan 100-101 tagged        | PC1 on vlan 100 ------------------------------------------------------------------------------------------------ PowerConnect5548 running config : vlan databasevlan 100-102exitmac address-table static 00:19:b9:75:32:c3 vlan 102 interface gigabitethernet1/0/3mac address-table static 00:1a:a0:36:29:10 vlan 102 interface gigabitethernet1/0/2voice vlan oui-table add 000181 Nortel__________________voice vlan oui-table add 0001e3 Siemens_AG_phone________voice vlan oui-table add 00036b Cisco_phone_____________voice vlan oui-table add 00096e Avaya___________________voice vlan oui-table add 000fe2 H3C_Aolynk______________voice vlan oui-table add 001049 Shoretel________________voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phonevoice vlan oui-table add 00907a Polycom/Veritel_phone___voice vlan oui-table add 00e0bb 3Com_phone______________iscsi target port 860 address 0.0.0.0iscsi target port 3260 address 0.0.0.0iscsi target port 9876 address 0.0.0.0iscsi target port 20002 address 0.0.0.0iscsi target port 20003 address 0.0.0.0iscsi target port 25555 address 0.0.0.0PC5548-1#PC5548-1>PC5548-1>PC5548-1> enPC5548-1# show runvlan databasevlan 100-102exitmac address-table static 00:19:b9:75:32:c3 vlan 102 interface gigabitethernet1/0/3mac address-table static 00:1a:a0:36:29:10 vlan 102 interface gigabitethernet1/0/2voice vlan oui-table add 000181 Nortel__________________voice vlan oui-table add 0001e3 Siemens_AG_phone________voice vlan oui-table add 00036b Cisco_phone_____________voice vlan oui-table add 00096e Avaya___________________voice vlan oui-table add 000fe2 H3C_Aolynk______________voice vlan oui-table add 001049 Shoretel________________voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phonevoice vlan oui-table add 00907a Polycom/Veritel_phone___voice vlan oui-table add 00e0bb 3Com_phone______________iscsi target port 860 address 0.0.0.0iscsi target port 3260 address 0.0.0.0iscsi target port 9876 address 0.0.0.0iscsi target port 20002 address 0.0.0.0iscsi target port 20003 address 0.0.0.0iscsi target port 25555 address 0.0.0.0hostname PC5548-1username admin password encrypted d033e22ae348aeb5660fc2140aec35850c4da997 privilege 15snmp-server community Dell_Network_Manager rw view DefaultSuper!interface vlan 1 ip address 192.168.0.10 255.255.255.0!interface vlan 100 ip address 172.88.88.2 255.255.255.0!interface vlan 101 ip address 172.88.1.2 255.255.255.0!interface vlan 102 ip address 172.88.2.2 255.255.255.0!interface gigabitethernet1/0/1 switchport mode trunk switchport general allowed vlan add 100-102 tagged switchport general allowed vlan add 1 untagged!interface gigabitethernet1/0/2 switchport mode general switchport general allowed vlan add 100-102 tagged switchport general allowed vlan add 1 untagged!interface gigabitethernet1/0/3 switchport mode general switchport general allowed vlan add 100-102 tagged switchport general allowed vlan add 1 untagged!Default settings:Service tag: 8RL57M1SW version 4.0.1.0 (date  12-Apr-2011 time  17:40:25)Gigabit Ethernet Ports=============================no shutdownspeed 1000duplex fullnegotiationflow-control onmdix autono back-pressureinterface vlan 1interface port-channel 1 - 32spanning-treespanning-tree mode RSTPqos basicqos trust coseee enable  PowerConnect 6248 Running config: !Current Configuration:!System Description "Powerconnect 6248, 3.2.0.7, VxWorks 6.5"!System Software Version 3.2.0.7!Cut-through mode is configured as disabled!configurevlan databasevlan 100-102vlan routing 101 1vlan routing 102 2vlan routing 100 3exithostname "PC6248_1"stackmember 1 2exitip address 172.88.13.1 255.255.255.0ip routinginterface vlan 100routingip address 172.88.88.192 255.255.255.0                   exitinterface vlan 101routingip address 172.88.1.1 255.255.255.0exitinterface vlan 102routingip address 172.88.2.1 255.255.255.0exitusername "admin" password 0466f4d9ae893ac580c59700a56234cd level 15 encrypted!interface ethernet 1/g1switchport mode trunkswitchport trunk allowed vlan add 1,100-102exitexit 
PowerConnect 5548 and 6248 : How to config a general mode on 5548 switch ?