Lenovo Flex System Fabric CN4093, Инструкция по применению

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CN4093 Application Guide for N/OS 8.4
Fibre Channel over Ethernet
Fibre Channel over Ethernet (FCoE) is an effort to converge two of the different
physical networks in today’s data centers. It allows Fibre Channel traffic (such as
that commonly used in Storage Area Networks, or SANs) to be transported
without loss over 10Gb Ethernet links (typically used for high ‐ speed Local Area
Networks, or LANs). This provides an evolutionary approach toward network
consolidation, allowing Fibre Channel equipment and tools to be retained, while
leveraging cheap, ubiquitous Ethernet networks for growth.
With server virtualization, servers capable of hosting both Fibre Channel and
Ethernet applications will provide advantages in server efficiency, particularly as
FCoE ‐ enabled network adapters provide consolidated SAN and LAN traffic
capabilities.
The Lenovo Flex System Fabric CN4093 10 Gb Converged Scalable Switch with
Enterprise NOS 8.4 software is compliant with the INCITS T11.3, FC ‐ BB ‐ 5 FCoE
specification, supporting up to 2048 FCoE connections.
Note:
Up to 2048 FCoE login sessions are supported. However, to achieve this
using the internal FCF module, you need eight Omni ports (belonging to a single
VLAN) connected to the FCF bridge.
The FCoE Topology
In an end ‐ to ‐ end Fibre Channel network, switches and end devices generally
establish trusted, point ‐ to ‐ point links. Fibre Channel switches validate end
devices, enforce zoning configurations and device addressing, and prevent certain
types of errors and attacks on the network.
In a converged multi ‐ hop FCoE network where Fibre Channel devices are bridged
to Ethernet devices, the direct point ‐ to ‐ point QoS capabilities normally provided
by the Fibre Channel fabric may be lost in the transition between the different
network types. The CN4093 provides a solution to overcome this.
Figure 32.
A Mixed Fibre Channel and FCoE Network
In Figure 32 on page 300 , the FCoE network is connected to the Fibre Channel
network through an FCoE Forwarder (FCF). The FCF acts as a Fibre Channel
gateway to and from the multi ‐ hop FCoE network. A full ‐ fabric FC/FCoE switch or
a Fibre Channel Node Port Virtualized (NPV) switch may perform the FCF
function. Although it may be possible to use an external FCF device, this chapter
focuses on using the built ‐ in Fibre Channel features of the CN4093 itself.
Switch
Servers Lenovo Chassis
EXT1
EXT22
INTA1
INTA2 0-2
4
LAN
Business-Critical LAN
802.1p Priority & Usage
3 FCoE Applications
802.1p Priority & Usage
FCoE
FCF CNA
CNA
Ethernet
LAN
Fibre
Channel