Juniper EX4300 Virtual Chassis - MTU on VCP links

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LessieHoeger
Posts: 1
Joined: Fri Mar 14, 2025 9:00 am

Juniper EX4300 Virtual Chassis - MTU on VCP links

Post by LessieHoeger » Fri Mar 14, 2025 9:04 am

Friends,

What's the recommended best practice for port MTU on an EX4300 VC stack? Normally I set all the ports on a switch to the max MTU of 9216. However I read that the VCP path can have a max MTU of 9150. Should I then just set the MTU for ALL ports to 9150 for consistency across the stack?

And now that I think of it, my "best practice" for setting all ports to maximum MTU (for switched ports, not for L3 interfaces) is based on some old information. What is the current recommendation for port L2 MTU?

rusty725
Posts: 332
Joined: Thu Mar 29, 2018 4:19 pm

Re: Juniper EX4300 Virtual Chassis - MTU on VCP links

Post by rusty725 » Fri Mar 14, 2025 11:45 pm

You can set to what Juniper suggests but throughput is going to be tiny anyways.

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