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March 10th, 2008 21:00

Trunk VLAN1?

I have a 6248 switch with two VLANs on it.  VLAN1 and VLAN2 (I have changed the management VLAN to VLAN 100 so i can route VLAN1)

I everything is good on the 6248 switch, routing between VLANs works well.

The 6248 switch is connected to a 5224 switch via a Gigabit port and the 5224 switch only has VLAN1 (management.) The 5224 switch connectes via a fiber connection to a 2724 switch.  Now on the 2724 switch I have a port which needs to be in VLAN2. 

So my questions are, do i need the ports which connect the three switches to be trunk ports?  and since i'm using the default VLAN on a few switches can that be trunked?

Currently my computer is connected to the 5224 switch and i can access everything on VLAN2 but currently no trunking is configued between the 5224 and the 6248.  So on the 2724 if i just add the port i need into VLAN2, would i need to configure anything else?

thanks

4 Posts

October 13th, 2011 03:00

You would need the ports connecting the 6248 to the 5224 and the 5224 to the 2724 to be trunk ports, otherwise you won't be able to get traffic through on VLAN2.   You will need to tag the ports in both VLAN's as it's switch-switch traffic.  If you have no need to access VLAN2 on the 5224, leave all ports forbidden for VLAN2 apart from the two trunks.  Then on the 2724, set the port you need as an access port with VLAN2 untagged. (unless you need VLAN1 also, in which case i think you can set the port to 'general' and untag both VLANs)

Andy

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