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Hey all, we are working on a switch from Cisco to Juniper. We are looking to see if anyone has actually stacked 10) EX 4400's together successfully. I know documentation says it will work to stack that many, but I am wondering if anyone has stacked the max amount and if there were any gotchas or performance issues.
over the years I deployed tons of VCs and from personal experience I can only strongly advise you to never go beyond a 6-Member VC. A 10 Member VC is doable (and I had multiple running) but besides a commit taking forever there are some „challenges" during upgrades or partial failures. If your VC has an issue then ALL Members can be affected and the more Members you have the bigger the impact will be. If you plan to introduce your 7th Member it's better to split the Members into 2 VCs.
Hope this helps
Sorry to change the discussion, but I am new to the community, and I didn't see a way to open a new chat. I have 2 ea new EX4400 stacked using the back 4 uplink ports. I think I am missing a step, because I cannot get either switch to see the other in the "show virtual-chassis status" . When I do a show interface:
root> show interfaces vcp-255/1/0 detail extensivePhysical interface: vcp-255/1/0, Enabled, Physical link is Down
It looks like the ports are not seeing the cable. Unsure if I am missing some additional configuration on the switches.
We have many of the EX4300's in stacks of 9 and 10 and not had any added issues over our smaller stacks. As for the stacking question there are only 2 qsfp stacking ports on the back for the EX4400's are referring to the 4 SFP uplink ports at the front of the chassis? if so you need to manually convert the ports you want to use to VC ports, here is a guide https://www.juniper.net/documentation/us/en/software/junos/virtual-chassis-fabric/topics/ref/command/request-virtual-chassis-vc-port-uplink.html.
You may also have to add this command to all switches and then reboot them all:
request virtual-chassis mode network-port disable
It will say it doesn't need a reboot, but it does...