Cisco Cisco Nexus 5010 Switch Guida Alla Progettazione
Design Guide
In a vPC topology, all links between the aggregation and the access layer would be forwarding and part of a virtual
PortChannel.
PortChannel.
Gigabit Ethernet connectivity would make use of the fabric extenders concept. Spanning Tree Protocol does not run
between the Cisco Nexus 5000 Series Switches and the Cisco Nexus 2000 Series Fabric Extenders. Instead,
proprietary technology keeps the topology between the Cisco Nexus 5000 Series and the fabric extenders free of
loops.
between the Cisco Nexus 5000 Series Switches and the Cisco Nexus 2000 Series Fabric Extenders. Instead,
proprietary technology keeps the topology between the Cisco Nexus 5000 Series and the fabric extenders free of
loops.
Figure 2.
Next-Generation Data Center Design
Connectivity from blade servers or servers connected through 10 Gigabit Ethernet can take advantage of the Cisco
Nexus 5000 Series line-rate 10 Gigabit Ethernet forwarding capabilities and copper twinax support. Blade server
connectivity to the Cisco Nexus 5000 Series can vary based on the type of switching device placed inside the blade
server, but this architecture is flexible enough to support pass-through or other multiplexing technologies as needed.
Nexus 5000 Series line-rate 10 Gigabit Ethernet forwarding capabilities and copper twinax support. Blade server
connectivity to the Cisco Nexus 5000 Series can vary based on the type of switching device placed inside the blade
server, but this architecture is flexible enough to support pass-through or other multiplexing technologies as needed.
In this topology, the Spanning Tree Protocol root and secondary root would still be placed at the aggregation layer on
the Cisco Nexus 7000 Series Switches, which would also be the primary and secondary HSRP devices providing the
gateway for the servers.
the Cisco Nexus 7000 Series Switches, which would also be the primary and secondary HSRP devices providing the
gateway for the servers.
Technology Overview
Virtual PortChannel
Virtual PortChannel (vPC) allows links that are physically connected to two different Cisco switches to appear to a
third, downstream device as coming from a single device and as part of a single port channel. The third device can be
a switch, a server, or any other networking device that supports IEEE 802.3ad port channels.
third, downstream device as coming from a single device and as part of a single port channel. The third device can be
a switch, a server, or any other networking device that supports IEEE 802.3ad port channels.
The Cisco NX-OS Software Virtual PortChannel and Cisco Catalyst
®
6500 Virtual Switching System (VSS) 1440 are
similar technologies. With regard to Cisco EtherChannel
®
technology, the term “multichassis EtherChannel (MCEC)”
refers to either technology interchangeably.
© 2010 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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