Table 60: Number Of 10-Gigabit Ethernet Access Ports Supported On Node Devices Based On Oversubscription Ratio - Juniper QFabric QFX3000-G Hardware Documentation

Table 60: Number of 10-Gigabit Ethernet Access Ports Supported on Node Devices Based on Oversubscription
Ratio
Oversubscription Ratio
on Access Ports
1:1 (no oversubscription)
2:1
3:1
3.5:1
4:1
6:1
Copyright © 2018, Juniper Networks, Inc.
Number of Number of
10-Gigabit Ethernet 10-Gigabit Ethernet
Access Ports Access Ports
Supported on a Supported on a
QFX3500 Node QFX3600 Node
Device Device
1:1 oversubscription is 32
not supported
N/A N/A
48 48
3.5:1 oversubscription 3.5:1 oversubscription
is not supported is not supported
N/A N/A
48 56
To calculate the required number of Node devices (N
the number of access ports you need for connections to either endpoint systems or
external networks (N ) by the number of access ports supported on each Node device
p
(N ) based on the required oversubscription ratio, and round up the resulting value.
a
For example, if you need 300 10-Gigabit Ethernet access ports at 3:1 oversubscription,
and your Node device supports 48 10-Gigabit Ethernet access ports at 3:1
oversubscription, you require 7 Node devices as shown below:
N = N /N
n p a
N = 300/48
n
N = 6.25 (rounded up to 7)
n
The number of Interconnect devices you require depends on the number of Node
devices and the oversubscription ratio required on the access ports of the Node devices.
See Table 61 on page 206
For example, if you plan to install 60 Node devices and require 3:1 oversubscription
ratio on the Node devices, you must install 2 Interconnect devices.
Number of 10-Gigabit
Ethernet Access
Ports Supported on a
QFX5100-24Q Node
Device
64
64
80 ports with 2
QFX-EM-4Q expansion
modules
3.5:1 oversubscription
not supported
64
96 ports with 2
QFX-EM-4Q expansion
modules using 4
uplinks to the
Interconnect device
to determine the number of Interconnect devices you require.
Chapter 9: Site Preparation
Number of
10-Gigabit Ethernet
Access Ports
Supported on a
QFX5100-48S and
QFX5100-48T Node
Device
1:1 oversubscription is
not supported
NA
3:1 oversubscription
not supported
56
N/A
6:1 oversubscription
not supported
) for your QFabric system, divide
n
205