R&M Data Center Handbook
R&M Data Center Handbook
R&M Data Center Handbook
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www.datacenter.rdm.com<br />
Dual End of Row<br />
The Dual End of Row variant is attractive for reasons of redundancy, since the concentration of Access Switches<br />
is split up on both ends of the cabinet row and the corresponding cable paths are also separated as a result. Apart<br />
from that, the solution corresponds to the EoR principle.<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
........<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
PATCH<br />
Aggregation<br />
& Core<br />
SAN<br />
Application Server or Storage Library<br />
SAN Connection<br />
LAN Connection<br />
KVM Connection<br />
Redunancy<br />
Uplink<br />
SAN Switch<br />
LAN Switch<br />
KVM Switch<br />
The following features are provided with this cabling architecture, in addition to the redundancy option.<br />
Advantages:<br />
Disadvantages:<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) • Longer rows of cabinets if necessary (+1 Rack)<br />
• Space optimization, allowing for server expansion<br />
3.4.3. Middle of Row (MoR)<br />
In MoR concepts, the concentration<br />
points containing the Access<br />
Switches are not located at the ends,<br />
but centrally within the rows of racks.<br />
Advantages: (similar to EoR)<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 />
PATCH<br />
• Flexible, scalable solution<br />
• Optimal port assignment<br />
• Easy MAC<br />
• Easier server expansion<br />
• Shorter distances to EoR<br />
........<br />
........<br />
Aggregation<br />
& Core<br />
SAN<br />
Disadvantages: (like EoR)<br />
• Greater cable volume in<br />
horizontal cabling<br />
• Many cable patchings for MoR<br />
Application Server or Storage Library<br />
SAN Connection<br />
LAN Connection<br />
KVM Connection<br />
Uplink<br />
SAN Switch<br />
LAN Switch<br />
KVM Switch<br />
R&M <strong>Data</strong> <strong>Center</strong> <strong>Handbook</strong> V2.0 © 08/2011 Reichle & De-Massari AG Page 61 of 156
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