Feature Description

Priority Flow Control (PFC)

The 10GE ports on the MZ912 support the PFC feature. This feature supports flow control and back pressure on a per class-of-service (CoS) basis. The MZ912 supports a maximum of eight CoS queues. If both the MZ912 and its connected peer device support PFC, the link between them supports PFC. The MZ912 can identify PFC frames sent by the peer device and adjusts the transmitting bandwidth. If the inbound traffic exceeds the threshold, the MZ912 sends PFC frames to instruct the peer device to control the traffic.

The MZ912 can negotiate with the peer device about PFC parameters over DCBX.

Enhanced Transmission Selection (ETS)

The 10GE ports on the MZ912 support the ETS feature. This feature assigns port transmitting bandwidth based on priority groups (PGs). The MZ912 supports a maximum of eight CoS queues and eight PGs (BWGs). The minimum bandwidth and maximum bandwidth are assigned to each PG. The minimum bandwidth means the committed bandwidth, which is also known as the committed information rate (CIR). The maximum bandwidth means the maximum shared bandwidth, which is also known as the peak information rate (PIR). If other PGs are underloaded, the local PG can share (borrow) their bandwidths and its maximum bandwidth can reach 10 Gbit/s.

802.1Q VLAN

The MZ912 supports a maximum of 4094 VLANs. Each 10GE port supports a maximum of 4094 VLANs. The VLAN IDs are integers ranging from 1 to 4094.

The MZ912 does not tag or untag packets, but transparently transmits them. VLAN IDs are specified by the OS on an E9000 compute node.

N_Port_ID Virtualization (NPIV)

The FC or FCoE ports on the MZ912 support the NPIV feature. With this feature, each port supports a maximum of 255 virtual N_Port_IDs and its own physical N_Port_ID.

Virtual N_Port_IDs can be assigned to VMs. In this way, the mapping between virtual N_Port_IDs and VMs is set up.

Single Root I/O Virtualization (SR-IOV)

The 10GE ports on the MZ912 support the SR-IOV feature. The NIC supports a maximum of 128 VFs or two physical functions (PFs) and 126 VFs. The VFs derived from each PF can be assigned to virtual machines (VMs). In this way, the mapping between VFs and VMs is set up.

PXE and SAN Boot

The 10GE ports on the MZ912 support PXE, and the FC or FCoE ports on the MZ912 support SAN Boot.

• PXE is used for remote boot over the Ethernet or IP network. It enables users to connect to the remote PXE server for loading an OS.
• This feature is used for remote boot over the FC or FCoE SAN. It enables users to connect to the remote FC or FCoE array for loading an OS.