Cisco Cisco Nexus 5010 Switch Guida Alla Progettazione
Design Guide
© 2010 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Cisco Nexus 5000 Series Overview
The Cisco Nexus 5020 Switch is a 52-port 10 Gigabit Ethernet switch capable of transporting Fibre Channel and
Fibre Channel over Ethernet.
Fibre Channel over Ethernet.
The Cisco Nexus 5000 Series features front-to-back cooling compatible with data center hot-aisle and cold-aisle
designs, with all switch ports at the rear of the unit in close proximity to server ports.
designs, with all switch ports at the rear of the unit in close proximity to server ports.
The Cisco Nexus 5000 Series provides 40 fixed 10 Gigabit Ethernet ports, each capable of FCoE, of which the first
eight fixed ports support both 10 Gigabit Ethernet and 1 Gigabit Ethernet. The expansion modules accept Fibre
Channel ports, 10 Gigabit Ethernet ports capable of FCoE, or a hybrid module with both Fibre Channel and 10
Gigabit ports.
eight fixed ports support both 10 Gigabit Ethernet and 1 Gigabit Ethernet. The expansion modules accept Fibre
Channel ports, 10 Gigabit Ethernet ports capable of FCoE, or a hybrid module with both Fibre Channel and 10
Gigabit ports.
The Cisco Nexus 5000 Series can be used for top-of-the-rack deployments and also to aggregate the 10 Gigabit links
in multiple racks. They can also be used in conjunction with the Nexus 2000 Series to provide Gigabit Ethernet top-of-
the -rack connectivity across 10–12 racks.
in multiple racks. They can also be used in conjunction with the Nexus 2000 Series to provide Gigabit Ethernet top-of-
the -rack connectivity across 10–12 racks.
The Cisco Nexus 5000 Series provides low-latency, cut-through forwarding independent of the packet size of traffic,
and line-rate, nonoversubscribed 10 Gigabit Ethernet wired-rate forwarding for all ports. The single-stage fabric
ensures no switch-induced congestion.
and line-rate, nonoversubscribed 10 Gigabit Ethernet wired-rate forwarding for all ports. The single-stage fabric
ensures no switch-induced congestion.
The Cisco Nexus 5000 Series can be used to connect servers equipped with converged network adapters and split
Fibre Channel traffic from IP traffic.
Fibre Channel traffic from IP traffic.
The Cisco Nexus 5000 Series also supports Virtual PortChannels and can aggregate up 16 10 Gigabit Ethernet ports
(all active).
(all active).
The Cisco Nexus 5000 Series is also capable of switching frames based on the virtual network tag (VNTag) for
further integration with I/O virtualization (IOV)-capable adapters and virtualized servers.
further integration with I/O virtualization (IOV)-capable adapters and virtualized servers.
More details on how to design with the Cisco Nexus 5000 Series at the access layer can be found in Chapter 6.
Cisco Nexus 2000 Series Overview
The Cisco Nexus 2000 Fabric Extenders provide an extension of the Cisco Nexus 5000 Series through modules that
operate as satellites of the Cisco Nexus 5000 Series Switches. At the time of this writing, the Cisco Nexus 2148T
Fabric Extender provides 48 Gigabit Ethernet server ports and four times 10 Gigabit Ethernet uplink ports in a 1RU
form factor. The Cisco Nexus 2148T Fabric Extender features front-to-back cooling compatible with data center hot-
aisle and cold-aisle designs, with all switch ports at the rear of the unit in close proximity to server ports.
operate as satellites of the Cisco Nexus 5000 Series Switches. At the time of this writing, the Cisco Nexus 2148T
Fabric Extender provides 48 Gigabit Ethernet server ports and four times 10 Gigabit Ethernet uplink ports in a 1RU
form factor. The Cisco Nexus 2148T Fabric Extender features front-to-back cooling compatible with data center hot-
aisle and cold-aisle designs, with all switch ports at the rear of the unit in close proximity to server ports.
The Cisco Nexus 2148T Fabric Extender forwards all traffic to the parent Cisco Nexus 5000 Series Switches over 10
Gigabit Ethernet uplinks. When all four fabric uplinks are used, the Cisco Nexus 2148T can support an
oversubscription ratio close to 1:1.
Gigabit Ethernet uplinks. When all four fabric uplinks are used, the Cisco Nexus 2148T can support an
oversubscription ratio close to 1:1.
All forwarding for the fabric extender is performed on the Cisco Nexus 5000 Series Switch, which is a single point of
management for all fabric extenders. The fabric extender does not run Spanning Tree Protocol even when multiple
links are connected to the parent switch, providing loop-free, active-active connectivity between the two.
management for all fabric extenders. The fabric extender does not run Spanning Tree Protocol even when multiple
links are connected to the parent switch, providing loop-free, active-active connectivity between the two.
The Cisco Nexus 2148T Fabric Extender provides 48 Gigabit Ethernet ports supporting 1G-BASE-T through RJ-45
connectors.
connectors.
It provides four 10 Gigabit Ethernet uplinks through Small Form-Factor Pluggable Plus (SFP+) ports using short-
reach (SR) optics with fiber or cost-efficient, copper-based twinax (CX1 direct attach) connectivity.
reach (SR) optics with fiber or cost-efficient, copper-based twinax (CX1 direct attach) connectivity.