Juniper QFX5110, Руководство по оборудованию, Страница: 30 / 222

It also provides a central location for the Precision Time Protocol (PTP) connections to
a grandmaster clock.
This topic describes:
•
Switch Overview on page 10
•
Switch Ports on page 10
• Channelizing Interfaces on page 11
• Virtual Chassis and Virtual Chassis Fabric on page 11
Switch Overview
The port panel of the QFX5110-48S supports 48 logical 10-GbE ports when operating as
a standalone switch. These data ports (
0
through
47
) support either 1-Gbps or 10-Gbps
SFP+ transceivers. You can also use SFP+ DAC cables and 10-Gbps active optical cables
(AOC) in any access port.
The remaining 4 QSFP28 ports (
48
through
51
) support speeds of 40 GbE or 100 GbE.
Each port can be configured as an independent 100-GbE port or as an independent
40-GbE port. These port are usually used as uplinks or Virtual Chassis Ports (VCP) on
QFX5110 Virtual Chassis or Virtual Chassis Fabric (VCF). In 40-GbE mode, these ports
can be channelized using QSFP+ to SFP+ DAC breakout (DACBO) cables.
The port panel also provides PTP connections to a grandmaster clock. There are also
10-MHz pulses-per-second (PPS) SubMiniature B (SMB) input and output connections
to measure the timing drift to and from the grandmaster clock.
Figure 3 on page 10 shows the port panel of the QFX5110-48S.
Figure 3: QFX5110-48S Port Panel
4— 1— 4 QSFP28 ports Electrostatic discharge (ESD) terminal
5— 2— Output clock at 10 Mhz RJ-45 connection to grandmaster clock
6— 3— 1 pulse per second (PPS) output connection 48 SFP+ ports
Switch Ports
CAUTION: Do not place a copper transceiver in an access port directly above
or below another copper transceiver. Internal damage to the access ports
and switch can occur. For copper transceivers, we recommend either using
the top port row exclusively, or the bottom port row exclusively.
Copyright © 2017, Juniper Networks, Inc. 10
QFX5110 Switch Hardware Guide