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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
Introduction
SmartConnect network hierarchy
Load balancing
Static or dynamic IP address allocation
Dynamic failover
Protocols and SmartConnect allocation methods
IP address quantification
SmartConnect service name
SmartConnect node suspension
SmartConnect and Reverse DNS
DNS delegation best practices
SmartConnect DNS, subnet, and pool design
SmartConnect in isolated network environments
DNS and time-to-live
Flushing DNS and OneFS
Where the SmartConnect Service IP runs (pre OneFS 8.2)
SmartConnect Multi-SSIP
Other SmartConnect considerations
Ethernet, MTU, and IP overhead 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

SmartConnect node suspension

SmartConnect node suspension

  • OneFS SmartConnect provides an option to administratively remove a node from a SmartConnect zone during a planned outage. Planned outages could be hardware replacement or maintenance activity.

    Once a node is suspended, SmartConnect prevents new client connections to the node. If the node is configured for dynamic allocation of IP addresses, IP addresses are not assigned to this node in a suspended state. Suspending a node ensures that client access remains consistent. After the node is suspended, client connections can be monitored and allowed to gradually drop-off before a reboot or power down.

    A node is suspended from the OneFS CLI or web interface. From the OneFS CLI, the command is:

    isi network pools --sc-suspend-node <groupnet.subnet.pool> <node ID>

    Alternatively, from the web interface, click Suspend Nodes under Pool, as shown in the following figure:

    Graphical user interface, text, applicationDescription automatically generated

    Figure 16.    SmartConnect node suspension

    After a node is suspended, new connections are not created. Prior to rebooting or shutting the node down, confirm all client connections have dropped by monitoring the web interface under the Client Connections tab on the Cluster Overview page. Also, clients might have to be manually booted from the node if they have static SMB connections with applications that maintain connections.