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I'm not finding much detail about the newer ex4400s. I was looking because I just put a virtual chassis into production in a pilot location. Then I looked at our log collections and found the vast majority of logs were from Linux Chassis Manager, lcmd, which seems to be related to Next Generation Routing Engine (NGRE). I can imagine that the newer switch JunOS could run as a VM, hence lcmd logs, but I'm not finding any documentation of such a thing.
Any other experiences?
Generally, we only have VMs for chassis internally for testing where the data plane also has a virtual emulation - the products that use Broadcom silicon don't have SW emulation, so the only thing we'd be able to run virtually would be the control plane ...
Sorry I wasn't more clear. When I said virtual chassis, I meant the combination of multiple physical ex4400 member switches into one logical device managed as a single chassis.https://www.juniper.net/documentation/us/en/software/junos/virtual-chassis-qfx/topics/concept/virtual-chassis-ex4200-overview.html