Dell N2000 Series Bedienungsanleitung PDF herunterladen (Seite 7)

Spanning Tree (STP)

The Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology for bridged

local area networks (LANs). STP allows a network design to include spare (redundant) links to provide

automatic backup paths via STP without the need for manual intervention.

When STP is enabled, the protocol monitors the participating ports/ VLANs. Should there be a change

in topology (a port goes active or a port goes down) STP blocks trafc on participating ports until the

network topology is determined. When a topology change is discovered, the ports participating in STP

are in a Blocking state; they will then move through a Listening, Learning, and then nally a Forwarding

state (when trafc is then forwarded).

For this reason, STP should be disabled on the ports that Scale nodes are connected to. Typically, this is

accomplished by setting portfast or edge-port mode on the switch port.

If STP is required for the customer LAN, then please enable Rapid STP on the Scale node ports. Rapid

STP allows a switch port to rapidly transition into the forwarding state during these situations.

Flow Control

Flow control is useful for managing the data rates between two links. It helps prevent a fast sending

connection from overwhelming a slower receiving connection and causing retransmits. Scale

recommends enabling ow control on ports where a Scale cluster connects to your LAN network.

Provide Feedback or Contact Support

If you have comments or suggestions regarding this document or other Scale Computing documentation,

you can send them to [email protected].

If you need help, call +1-877-SCALE-59 (877-722-5359), and someone from the Scale Computing

Technical Support Team will be happy to help you. You can also email Scale Computing Technical Support

at [email protected] or nd them on the web at www.scalecomputing.com.

Disclaimer

Any information listed here is subject to change at any time. Shifting hardware and software

requirements and industry changes mean that not all current recommendations or requirements can or

will be sustained. This information is not a substitute for the product’s user guide or support and is not

covered under the support and warranty for the HC3 cluster. Scale Computing is not responsible for

any issues or damages arising out of the use of this reference guide.

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Dell N2000 Series Bedienungsanleitung Seite 7