By default all traffic will be carried over a trunk link and will be tagged with the VLAN ID to distinguish between traffic from different VLAN's. However I think that you will have to create the new VLAN on both switches, even though you may have no ports in this VLAN on switch 1.
Of course as you are using dot1q encapsulation, native VLAN (VLAN 1 by default) traffic is passed untagged across the trunk. When the receiving switch sees the untagged packets, it then knows that this traffic is destined for the native VALN.
You will also have to consider intervlan routing. Do you want the hosts on the "one big VLAN" to communicate with host on this new VLAN?
Then you will need to introduce layer 3 functionality, if you do not already have it. If switch 1 connects to a router, then you can configure the new VLAN information there. If not you will have to turn on routing on switch 1 to route traffic between the existing "big VLAN" and the new VALN.
It would help if you could provide some information about your topology, as in what is switch 1 connected to (if anything)? Do you have a flat LAN (Single VALN) or is your LAN comprised of multiple VLANS? If yes, how is intervlan routing handled? Will traffic from outside of your LAN (remote offices, etc) need to access this new VLAN?
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
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