Juniper QFX5100, Hardware Manual

Page: 37 / 256

•
Virtual Chassis and Virtual Chassis Fabric on page 20
• Port LEDs on page 20
Switch Ports
The QFX5100-24Q switch ports, ( 0 through 23 ) support:
•
40 Gbps QSFP+ transceivers
• QSFP+ direct attach copper (DAC) cables
• QSFP+ to SFP+ direct attach copper break out (DACBO) cables
•
Access ports
You can use 40-Gigabit Ethernet QSFP+ transceivers and QSFP+ direct attach copper
cables in any downstream port. See
“Interface Specifications for SFP, SFP+, and QSFP+
Transceivers for the QFX Series” on page 61 and “Interface Specifications for QSFP+
DAC Breakout Cables for the QFX Series” on page 79 .
•
Uplink ports
You can configure up to 4 of the 40 GbE ports as uplinks. Each additional QFX-EM-4Q,
Expansion Module adds the switch uplink capacity by 2 for a total of 8 uplinks.
Channelizing Interfaces
When fully populated with 2 QFX-EM-4Q Expansion Modules, the QFX5100-24Q has
128 physical ports. However, only 104 logical ports can be used for port channelization.
Depending on the system mode you configure for channelization, different ports are
restricted. If you attempt to channelize a restricted port, the configuration is ignored. The
following system modes are available on the QFX5100-24Q switch:
• Default mode
All 24 QSFP+ ports on the switch (PIC 0) are channelized by default (96 ports). With
QFX-EM-4Q Expansion Modules (PIC 1) and (PIC 2), the QSFP+ ports are supported
for access or uplink ports, but cannot be channelized. Ports are over-subscribed In this
mode and could be subject to packet-loss. You can have one of two port combinations:
32 40-Gbps QSFP+ ports, or 96 10-Gigabit Ethernet ports plus 8 40-Gbps QSFP+
ports.
• 104 port mode
All 24 QSFP+ ports on the switch (PIC 0) are channelized (96 ports). Two ports on
QFX-EM-4Q Expansion Module (PIC 1) are also channelized (8 additional). In this
mode, ports 0 and 2 are channelized by default and ports 1 and 3 are disabled. If
additional QSFP+ ports are detected in an expansion module (PIC 2), those ports are
ignored.
•
Flexi-pic mode
Ports 0 through 3 of the switch cannot be channelized; ports 4 through 24 are
channelized by default (80 ports). With QFX-EM-4Q Expansion Modules (PIC 1) and
19 Copyright © 2014, Juniper Networks, Inc.
Chapter 2: Chassis