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tagged and untagged VLANs with Trucking

Hi,

i have 2 6248 switches, and 2 5548.

i am starting to configure the network on the 6248 switches.

i have 3 VLANs (1,99,98) and 111 is my management VLAN.

all the ports are untagged (i see 'U' on VLAN management interface).

1 of the ports is connected to 5548 switch (with default settings), and i need it to be able to share some VLANs (1+98).

when i am moving the port to be trunk port, the connection to the PCs on the 5548 not works (when the port is on VLAN 1 the connection from the VLAN works great).

Do you have any idea why can it be?

is it possible to connect TRUNK port with untagged VLANs? i read that trunk is tagged only, and general is used for untagged VLANs, but if i will use general port, the broadcast from VLANs on 5548 will get only to PVID VLAN only, so its not really help me.. i need the port to be able to transfer and receive data from all VLANs on both sides (this is the reason i think i should use tagged trunk), but i need the machines on the VLANs to be untagged connections (i don't want to set on my server the VLANID). is it possible?

am i understood TRUNK and GENERAL correctly?

Thanks.


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