HP 200 Converged Networks and Fibre Channel over Ethernet

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  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 1
    Fibre Channel over Ethernet (FCoE) 3 Challenges for end-to-end network convergence 4 Servers 4 Direct-attach storage 5 Storage Area Network 5 iSCSI: SANs 7 FCoE and DCB progress and challenges ahead 8 Using HP Flat SAN technology to enhance single hop FCoE 9 Evolution of storage
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 2
    as the Converged Network standard. In compliance with ratified industry standards, HP has successfully implemented converged Fibre Channel over Ethernet (FCoE) networks at the server edge using top-of-rack (ToR) switches, Virtual Connect (VC) FlexFabric module, FlexFabric Adapters, and Converged
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 3
    discovery and configuration of network devices that support PFC and ETS parameter negotiation between link partners. DCBX is specified as part of the same standard as ETS. • Quantized Congestion Notification (QCN): 802.1Qau supports end-to-end flow control in a switched LAN infrastructure and
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 4
    Ethernet, and legacy Fibre Channel ports. Examples of FCFs include HP VC FlexFabric modules and HP Networking 5820X top-ofrack access switches with Fibre Channel option modules. FCoE has several advantages: • The CNA appears to the OS as a FC HBA and a NIC and uses existing OS device drivers. FCoE
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 5
    , and the Fibre Channel host bus adapters (HBAs) add noticeably to server cost. Therefore FCoE is a compelling choice for the first network hop in such servers. HP ProLiant BL G7 and Gen8 blade servers have embedded CNAs, called FlexFabric adapters, which eliminate some hardware costs associated
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 6
    Table 1. Converged Network Candidates Network environments Directory, security, other, SAN services Flow control (one hop) FCoE on DCB Fibre Channel switch software Per priority pause (PFC) part of DCB Flow control (endto-end) How would a cluster connection be added here? QCN (part of DCB) RoCEE
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 7
    FECN/ BECN mechanism) Fibre Channel DCB Cisco's latest direction for FCoE over CEE Credit (BB Credit) Per priority pause flow control (PFC) Per priority pause flow control Severely limit number of hops, or tune configuration QCN FCF in each switch hop Same multi-hop limitations as FC SANs 7
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 8
    time of publishing this paper. One of the concepts discussed publicly in FC-BB-6 has been a device called an FDF, which acts as a port expander to a Fibre Channel switch (or Ethernet switch running the Fibre Channel switch software). The FDF will have a much clearer set of responsibilities in the
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 9
    if a Fibre Channel switch) Yes. inherently single vendor, no congestion management Yes, at small scale Deployments no more complicated than existing FC SANs * Limited support for FCF-per-hop makes it a proprietary, single-vendor approach for the immediate future. Using HP Flat SAN technology to
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 10
    FC based HP 3PAR Flat SAN technology Systems Evolution of storage It seems inevitable that the storage networking now accomplished with Fibre Channel /Fibre Channel combination. Using open source Internet iStorage Name Service Server (iSNS) instead of the higher priced Fibre Channel switch software
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 11
    switch FC-based HP 3PAR Flat SAN technology Systems that operate within the proven single hop environment. This is a good time to explore storage connection alternatives and begin to estimate what percent of your storage needs is best met by block storage on a SAN (Fibre Channel hardware vendors. 11
  • HP 200 | Converged Networks and Fibre Channel over Ethernet - Page 12
    and Data Center Bridging technology brief HP Virtual Connect Direct-Attach Fibre Channel for HP 3PAR Storage Systems solutions brief HP FlexFabric Networks web portal OpenFlow - Software-Defined Network Web address http://h20000.www2.hp.com/bc/docs/support/SupportManual/c03094466/c030 94466.pdf
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Technical white paper
Converged Networks and Fibre Channel over
Ethernet
Table of contents
Abstract
2
Introduction
2
Converged networks
2
Data Center Bridging
3
Fibre Channel over Ethernet (FCoE)
3
Challenges for end-to-end network
convergence
4
Servers
4
Direct-attach storage
5
Storage Area Network
5
iSCSI: SANs using TCP/IP networks
5
Cluster interconnects
5
Approaches to converged data center
networks
5
Convergence strategies
6
Cost structure
7
Congestion and flow control
7
FCoE and DCB progress and challenges
ahead
8
Using HP Flat SAN technology to
enhance single hop FCoE
9
Evolution of storage
10
Conclusion
11
For more information
12