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New and Changed Features


This section describes the new features and enhancements in this release.

  • Class of Service support for eight queues—Two-level hierarchical scheduling (per-unit scheduler or hierarchical scheduler) with VLAN queuing is supported for eight queues. Each VLAN uses three traffic classes and eight queues. There are two high-priority queues (Queue 0 and Queue 6), two medium-priority queues (Queue 1 and Queue 7), and four low-priority queues (Queue 2 through Queue 5). Shaping is supported at the traffic class level, not at the queue level. Weighted random early detection, drop profiles, and queue buffer size configuration are not supported. You enable CoS by configuring the flexible-queuing-mode option at the [edit chassis fpc 0] hierarchy level.

  • ESXi hypervisor—VMware ESXi 5.5 is supported as a hypervisor. You can use vSphere 5.5 or vCenter Server for the management client. E1000 and VMXNET3 are the supported physical PCI devices. You can install vMX using an OVA image.

  • Performance mode is default for chassis—Performance mode is enabled by default for the chassis. Performance mode needs more vCPUs and memory to run at higher bandwidth, while lite mode needs fewer vCPUs and memory to run at lower bandwidth. Make sure you have configured the proper number of vCPUs and memory for your VMs. You must also enable hyperthreading in BIOS.

  • Licenses—Bandwidth licenses are additive. If you add multiple bandwidth licenses, you are entitled to use the sum of all the bandwidth licenses for capacity. In previous releases, you are entitled to use only the capacity of the largest bandwidth license when you add multiple bandwidth licenses.

    Evaluation licenses are perpetual. You can download the vMX software and use the BASE application package with 1 Mbps bandwidth without a license indefinitely.

  • Support for FreeBSD 10 kernel for Junos OS—FreeBSD 10 is the underlying OS for Junos OS instead of FreeBSD 6.1 for vMX. With FreeBSD 10, you can allocate multiple vCPUs to the VCP.