Juniper QFX3000-G QFabric, Руководство по развертыванию, Страница: 55 / 652

to servers and storage, as well as configure aggregated LAG connections that span the
two Node devices.
NOTE: The Node devices in a redundant server Node group must be of the
same type, either a QFX3500 Node device or a QFX3600 Node device. You
cannot add a QFX3500 and a QFX3600 Node device to the same redundant
server Node group.
Related
Documentation
Configuring Node Groups for the QFabric System on page 395
•
•
Understanding Node Devices on page 24
•
Understanding Routing Engines in the QFabric System on page 19
•
Understanding the QFabric System Hardware Architecture on page 15
Understanding Port Oversubscription on Node Devices
Supported Platforms QFabric System
Each Node device in a QFabric system can have a different port oversubscription
configuration. For example, you can have a Node device with 3:1 port oversubscription,
another with 6:1 oversubscription, and yet another with 1:1 oversubscription.
The port oversubscription ratio on a Node device is based on the number of uplink
connections from the Node device to Interconnect devices. For example, you can configure
1:1 port oversubscription on your QFX3600 Node device by connecting the eight uplink
ports (labeled Q0 through Q7) on the Node device to Interconnect devices.
Table 6 on page 29 shows the oversubscription ratio for ports on Node devices based on
the number of Interconnect devices and the number of connections from each Node
device to each Interconnect device.
Table 6: Oversubscription Ratio on Node Devices
Oversubscription Ratio on Node Device
Number of Connections from Each
Node Device to Each Interconnect
Device
Number of Interconnect
Devices
6:1 1 2
3:1 2 2
1:1 (Supported on QFX3600 Node devices only) 4 2
3:1 1 4
1:1 (Supported on QFX3600 Node devices only) 2 4
29 Copyright © 2015, Juniper Networks, Inc.
Chapter 2: Hardware Architecture Overview