Multiple switch VLAN question

[TwiztedTD]

Hi everyone,

I am setting up my network to now have vlans.
Here is my equipment,

Netgear router
2 x SG200-26

Currently I have a Netgear router and configured two vlans on port 1 of the firewall

VLAN 1 (staff vlan) 192.168.1.x
VLAN100 (public vlan for guests)192.168.10.x

Out of port 1 on the firewall will connect to port 1 on the SG200-26

I know how to create VLAN100 on the switch.

I know I need port 1 to be a trunk port.

But when I assign VLAN100 to the trunk port, does it need to be tagged or untagged?

Also out of port 24 on the sg200 ill be hooking it up to the other sg200 on port 24, and I know those have to be trunks as well.  But does the VLAN100 need to be tagged or untagged?

Thank you for your help!

[Richard Burts]

Which vlan to tag will depend on how the firewall is configured. The common practice would be that the firewall expects vlan 1 to be not tagged, which indicates that vlan 100 should be tagged. But it is possible that the firewall is configured to expect vlan 100 to be not tagged which would mean that vlan 1 would be tagged.

The answer to your second question is that there needs to be consistency between the switches about which vlan is tagged and which vlan is not tagged. So the answer to whether switch 2 needs to treat vlan 100 as tagged or not tagged will depend on how switch 1 treats that vlan.

HTH

Rick