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Forum Discussion
Solved
VLAN across two switches
We've got an interesting issue trying to get VLAN traffic to pass between a couple of our switches. At a high level, our topology is as follows; The issue is that we are not getting DHCP address...
For a trunk-connection (carrying multiple VLAN), as usual both ends must be configured the same. Either use all VLANs tagged (the "ideal" solution unless there are other [VLAN-transparent] L2 devices in the data path), or keep one [the basic] VLAN untagged, and have the PVID set to the VLAN ID of that very same VLAN ID.
For access ports, only use one VLAN ID [U]ntagged, the PVID set to the same VLAN ID. Remove any other VLAN memberhips - [ ].
For a trunk-connection (carrying multiple VLAN), as usual both ends must be configured the same. Either use all VLANs tagged (the "ideal" solution unless there are other [VLAN-transparent] L2 devices in the data path), or keep one [the basic] VLAN untagged, and have the PVID set to the VLAN ID of that very same VLAN ID.
For access ports, only use one VLAN ID [U]ntagged, the PVID set to the same VLAN ID. Remove any other VLAN memberhips - [ ].
This appears to be the solution. The PVID was where I think we'd come unstuck. For posterity, and for the edification of future users with a similar issue, this is now what has produced a working solution.
The bottom switch (of the topology above) is configured per these screenshots
The top switch is configured thusly;
I hope this helps, and thanks schumaku for getting us back on the right track.
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