Users Guide

Table Of Contents
Broadcom NetXtreme-E-UG304-2CS
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NetXtreme-E User Guide User Guide for Dell Platforms
4.12.3 ENS Performance
This section contains ENS performance information:
3-5x improvement in packet rate over the existing vSphere networking stack performance scales with the number of
system threads.
Acceptable packet loss.
Low jitter and latency 1x 3-5x Guest: DPDK API + App Host: Default vSwitch Guest: DPDK API + App Host: ENS
vSwitch.
Figure 22: Vmware ENS stack
For additional information, see https://docs.vmware.com/en/VMware-NSX-T-Data-Center/2.5/administration/GUID-
668EB7EF-3E39-46C8-AF2F-43B7DAB6D42E.html
4.12.4 Limitations and Restrictions
This section contains the limitations and Broadcom support restrictions:
LRO is not supported by the current ENS stack. RO is not supported in the ENS path.
RSS is not supported by the current ENS stack. RSS is not supported in the ENS path.
SR-IOV is disabled when ENS is enabled on the PF.
ENS is supported with ESXi 7.0 or higher.
4.13 Supported Combinations
The following sections describe the supported feature combinations for this device.
4.13.1 NPAR, SR-IOV, and RoCE
Table 19 shows the supported feature combinations of NPAR, SR-IOV, and RoCE.
Table 19: NPAR, SR-IOV, and RoCE
SW Feature Notes
NPAR Up to 8 PFs or 16 PFs
VM
DPDK VNF
Vmxnet3
PMD
Hugepages
Allocated
SSE
Flow
Cache
Dedicated/
Pinned Cores
2 MB Heap/
Fastslab
NUMA-
Awareness
DPDK Learnings Integrated
vSphere
Kernel
bnxtnet_ens
PMD
bnxtnet_ens
PMD
Vmxnet3
device for ENS
ENS vSwitch
10G
40G
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