Click the Exhibit button.
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You are designing a Virtual Chassis solution for your company’s data center with the switches shown in the exhibit.
Which two switches should be assigned a Routing Engine role? (Choose two.)
A. switch A
B. switch C
C. switch D
D. switch B
Correct Answer: AD
Explanation/Reference:
Explanation:
The QFX5100’s should be the routing engines. In a mixed Virtual Chassis, the switch in the master Routing Engine role determines which switches are supported in the line card role of the mixed Virtual Chassis.
When a mixed Virtual Chassis is using a QFX5100 switch in the master Routing Engine role, you can use QFX5100, QFX3600, QFX3500, or EX4300 switches in the line card role.
When a mixed Virtual Chassis is using a QFX3600 or QFX3500 switch in the master Routing Engine role, you can use QFX3600, QFX3500, or EX4300 switches in the line card role.
In a mixed EX4300 and EX4600 Virtual Chassis, an EX4600 switch automatically assumes the Routing Engine role.
EX4600 switches can only be in a mixed Virtual Chassis with EX4300 switches. EX4600 switches cannot be in a mixed Virtual Chassis with QFX5100, QFX3600, or QFX3500 switches.
We recommend always configuring the same type of switch into the master and backup Routing Engine role, to ensure that the switch operating in the master role remains the same type of switch in the event of a switchover.
In most mixed Virtual Chassis, you must configure your Virtual Chassis to ensure a switch that supports the master Routing Engine assumes the master Routing Engine role. Without user configuration, any switch — with the exception of the EX4300 switch, which can never assume the master or backup
Routing Engine role in a mixed Virtual Chassis or VCF — can assume the master or backup Routing Engine role.
Reference: https://www.juniper.net/techpubs/en_US/junos13.2/topics/concept/virtual-chassis-ex-qfx-series-mixed-understanding.html#jd0e283
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