Your Browser is Out of Date

Nytro.ai uses technology that works best in other browsers.
For a full experience use one of the browsers below
PowerScale: Network Design Considerations
Executive summary Network architecture design Latency, bandwidth, and throughput Ethernet flow control SyncIQ considerations Quality of Service (QoS) Software-Defined Networking PowerScale OneFS ports SmartConnect considerations Ethernet, MTU, and IP overhead
Introduction
Ethernet packet
Ethernet payload
Jumbo frames
IP packet overhead
Data payload to Ethernet frame efficiency
ICMP and MTU with OneFS
OneFS MTU commands
VLAN and interface MTU
Confirming transmitted MTU
Access Zones best practices Source-Based Routing considerations Isilon 6th generation 1 GbE interfaces Intelligent Platform Management Interface IPv6 OneFS host-based firewall Network troubleshooting Appendix A: Supported network optics and transceivers Appendix B: Technical support and resources

Data payload to Ethernet frame efficiency

Data payload to Ethernet frame efficiency

  • Based on the preceding calculations, the following table provides additional examples of the amount of data that is sent per Ethernet frame for standard and jumbo frames.

    Table 10.  Data payload to Ethernet frame percentage

    Packet type

    Data to Ethernet frame percentage

    Standard frame

    Jumbo frame

    IPv4 / TCP

    94.93%

    99.14%

    IPv4 / TCP / Linux Timestamp

    94.15%

    99.00%

    IPv4 / TCP / Linux Timestamp / VLAN

    93.90%

    98.96%

    IPv6 / TCP

    93.63%

    98.92%

    IPv6 / TCP / Linux Timestamp

    92.85%

    98.78%

    IPv6 / TCP / Linux Timestamp / VLAN

    92.59%

    98.74%

    IPv4 / UDP

    95.71%

    99.27%

    IPv4 / UDP / Linux Timestamp

    94.93%

    99.14%

    IPv4 / UDP / Linux Timestamp / VLAN

    94.67%

    99.09%

    IPv6 / UDP

    94.41%

    99.05%

    IPv6 / UDP / Linux Timestamp

    93.63%

    98.92%

    IPv6 / UDP / Linux Timestamp / VLAN

    93.37%

    98.87%

    Note: NFS v2 is UDP. NFS v3 and v4 are TCP. SMB is TCP.

    As shown in the preceding table, jumbo frames deliver between 98 and 99 percent efficiency depending on the packet type. The efficiencies are only maximized when all hops from the client endpoint to a PowerScale node support jumbo frames. Otherwise, packets might be fragmented, leading to additional processing overhead on devices or PMTUD finding the lowest MTU along the path. Therefore, jumbo frames are recommended for optimal performance. However, each workload environment is unique. Measure performance enhancements in a lab before updating a production network.