PrefaceThe H3C S7500E documentation set includes 12 configuration guides, which describe the softwarefeatures for the H3C S7500E Series Ethernet Switches and guide you through the softwareconfiguration procedures. These configuration guides also provide configuration examples to help youapply software features to different network scenarios.The IRF Configuration Guide describes how to use two S7500E switches to create an IRF virtual devicebased on the IRF technology. It covers planning the switch roles in the IRF virtual device, connectingthe IRF link, and detecting and maintaining the IRF virtual device.This preface includes:z Audiencez Document Organizationz Conventionsz About the H3C S7500E Documentation Setz Obtaining Documentationz Documentation FeedbackAudienceThis documentation is intended for:z Network plannersz Field technical support and servicing engineersz Network administrators working with the S7500E seriesDocument OrganizationThe IRF Configuration Guide comprises the following part:IRF ConfigurationConventionsThis section describes the conventions used in this documentation set.Command conventionsConvention DescriptionBoldface Bold text represents commands and keywords that you enter literally as shown.italic Italic text represents arguments that you replace with actual values.[ ] Square brackets enclose syntax choices (keywords or arguments) that areoptional.{ x | y | ... } Braces enclose a set of required syntax choices separated by vertical bars,from which you select one.[ x | y | ... ] Square brackets enclose a set of optional syntax choices separated by vertical