R&M Data Center Handbook
R&M Data Center Handbook
R&M Data Center Handbook
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
www.datacenter.rdm.com<br />
3.4.4. Two Row Switching<br />
The terminal devices (server and storage systems) in this concept as well as network components (switches) are<br />
housed in separate cabinet rows, which can be a sensible option in smaller data centers.<br />
Aggregation<br />
& Core<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
Switches<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
Application Server or<br />
Storage Library<br />
SAN Switch<br />
SAN Connection<br />
LAN Connection<br />
KVM Connection<br />
Redunancy<br />
Uplink<br />
LAN Switch<br />
KVM Switch<br />
This cabling structure, which is comparable to the Dual End of Row concept, stands out because of the following<br />
features.<br />
Advantages: (similar to EoR)<br />
Disadvantages: (like EoR)<br />
• Flexible, scalable solution (future-proof) • Greater cable volume in horizontal cabling<br />
• Relatively good LAN port assignment (efficient) • Many cable patchings for EoR switches (server and<br />
• Concentration of Access Switches in 2 places<br />
uplink ports), but ½ of EoR<br />
(simplified moves/adds/changes)<br />
• Space optimization in racks, allowing for server<br />
expansion<br />
• Shorter distances in backbone<br />
3.4.5. Other Variants<br />
Other possible variants on cabling structures are listed below. As mentioned at the start, combinations or hybrid<br />
forms of the described cabling architectures are used in practice, depending upon physical conditions and requirements.<br />
The same is true with the selection of transmission media, which can determine data center sustainability in terms<br />
of migration options (scalability). An overview of different transmission protocols and the media they support as<br />
well as their associated length restrictions can be found in section 3.8.<br />
Page 62 of 156 © 08/2011 Reichle & De-Massari AG R&M <strong>Data</strong> <strong>Center</strong> <strong>Handbook</strong> V2.0
Change language