HP GbE2c HP GbE2c Ethernet Blade Switch for c-Class BladeSystem Application Gu - Page 87
Basic IP routing, IP routing benefits, Routing between IP subnets - jumbo frames
UPC - 808736802215
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Basic IP routing This chapter provides configuration background and examples for using the GbE2c Layer 2/3 Ethernet Blade Switch to perform IP routing functions. The following topics are addressed in this chapter: • IP Routing Benefits • Routing Between IP Subnets • Example of Subnet Routing • Defining IP Address Ranges for the Local Route Cache • Dynamic Host Configuration Protocol NOTE: IP Routing features are available only on the GbE2c Layer 2/3 Ethernet Blade Switch. IP routing benefits The GbE2c uses a combination of configurable IP switch interfaces and IP routing options. The switch IP routing capabilities provide the following benefits: • Connects the server IP subnets to the rest of the backbone network. • Provides another means to invisibly introduce Jumbo frame technology into the server-switched network by automatically fragmenting UDP Jumbo frames when routing to non-Jumbo frame VLANs or subnets. • Provides the ability to route IP traffic between multiple Virtual Local Area Networks (VLANs) configured on the switch. Routing between IP subnets The physical layout of most corporate networks has evolved over time. Classic hub/router topologies have given way to faster switched topologies, particularly now that switches are increasingly intelligent. GbE2c Ethernet Blade Switches are intelligent and fast enough to perform routing functions on a par with wire speed Layer 2 switching. The combination of faster routing and switching in a single device provides another service-it allows you to build versatile topologies that account for legacy configurations. For example, consider the following topology migration: Basic IP routing 87