Question 1

What are Juniper Switch Modules & Cards?

Accepted Answer

Juniper Switch Modules & Cards are modular hardware components designed for Juniper EX, QFX, and MX series chassis. They deliver high-density ports, flexible interface types, and advanced switching features to scale campus, data center, and carrier networks.

Question 2

How do Juniper line cards differ from expansion modules?

Accepted Answer

Juniper line cards provide front-panel port density and switching capacity, while expansion modules add specialized functions—such as stacking, management, or PoE—to compatible Juniper chassis without increasing core throughput.

Question 3

Which Juniper switch modules are compatible with EX series?

Accepted Answer

EX Series compatibility varies by chassis: EX2300 supports fixed PoE ports, EX3400 and EX4300 accept SFP/SFP+ uplink modules, and EX9200 employs high-density 40/100GbE line cards. Always verify the Juniper hardware compatibility matrix.

Question 4

How do I choose the right Juniper switch card for my network?

Accepted Answer

Select a Juniper switch card based on required port types (Gigabit, 10GbE, 40GbE, 100GbE), line-rate performance, chassis compatibility, and feature licensing. Match port density and forwarding capacity to your traffic profile.

Question 5

What throughput can I expect from Juniper switch modules?

Accepted Answer

Juniper switch modules deliver line-rate performance per port up to 100GbE. Total throughput scales with module density and chassis backplane capacity: EX series supports up to 2.56Tbps, QFX up to 22Tbps per system.

Question 6

How do I install a Juniper switch line card?

Accepted Answer

To install a Juniper switch line card, power down the chassis, slide the card into the designated slot until it clicks, secure it with captive screws, reconnect power, and verify recognition via CLI show chassis hardware.

Question 7

Can I mix different Juniper switch cards in one chassis?

Accepted Answer

Yes. Many Juniper chassis support mixed line-card configurations, enabling Gigabit, 10GbE, and 40GbE modules in the same system. Always confirm slot-specific power and backplane requirements in the compatibility documentation.

Question 8

What features do Juniper expansion modules provide?

Accepted Answer

Juniper expansion modules deliver stacking, Virtual Chassis, increased management ports, enhanced fabric capacity, PoE/PoE+ power delivery, and integration of security services for seamless network scale-out.

Question 9

How do I upgrade firmware on Juniper switch modules?

Accepted Answer

Use Junos OS software to upgrade switch modules: upload the firmware to the management interface, execute request system software add no-validate, and reboot. Monitor progress via show system commit and show chassis firmware commands.

Question 10

How can I troubleshoot a failed Juniper switch module?

Accepted Answer

Troubleshoot failed modules by checking CLI output (show chassis alarms, show chassis hardware), inspecting LED status, reseating the card, verifying power/cooling, and consulting Juniper’s Knowledge Base for error-code resolution steps.

Question 11

What are the power and cooling requirements for Juniper switch cards?

Accepted Answer

Juniper switch cards draw power from the chassis power supplies and rely on front-to-back or back-to-front cooling fans. Verify per-card power consumption and thermal specifications in the product datasheet to ensure adequate capacity.

Question 12

How does Juniper Virtual Chassis work with switch modules?

Accepted Answer

Virtual Chassis allows multiple Juniper switches with compatible modules to operate as a single logical device. It uses dedicated VCP (Virtual Chassis Port) modules for fabric links, simplifying management and increasing resiliency.

Question 13

Do Juniper switch cards support PoE?

Accepted Answer

Certain EX Series expansion modules support PoE/PoE+ and deliver up to 30W per port. Verify model-specific power budgets and enable PoE via CLI or Junos Space to power IP phones, access points, and security cameras.

Question 14

What warranty and support options are available for Juniper modules?

Accepted Answer

Juniper offers a Limited Lifetime Warranty on hardware modules, along with Software Updates and Juniper Care support services. You can purchase 24×7 SLAs, advanced replacement, and on-site assistance for expedited issue resolution.

Question 15

What port density options do Juniper switch line cards offer?

Accepted Answer

Juniper line cards provide a variety of port densities: up to 48×1GbE, 32×10GbE, 16×40GbE, or 8×100GbE per card. High-density variants enable over 1,280 ports in a single chassis for large-scale deployments.

Question 16

Are Juniper switch modules hot-swappable?

Accepted Answer

Yes. Most Juniper switch modules and line cards are hot-swappable in EX, QFX, and MX series chassis. Remove or install modules without powering down the entire system, minimizing downtime when expanding or servicing.

Juniper Switch Modules & Cards

QFX3100-HDD-2TB (2TB Hard Drive for QFX3100 (spare))

QFX3008-FAB-2INTC-BNDL (QFX3008 INTERCONNECT BUNDLE)

QFX3008-SF16Q (QFX3008 FRONT CARD)

QFX3008-SR1 (REAR FABRIC CARD FOR QFX3008 (SPARE))

QFX3100-FANA (Fan Module for QFX3100 (spare))

QFX3100-NM-4GE (Network Interface Card with 4x10/100/1000BASE-TX for QFX3100 (spare))

QFX3100-NM-4GE-SFP (Network Interface Card with 4x1GE SFP for QFX3100 (spare))

QFX3008-FAB-CPE-BNDL (QFX3008 CONTROL PLANE ETHERNET BUNDLE)

QFX3008-FAB-DRCTR-BNDL (QFabric QF/Director bundle with 2 QF/Directors)

QFX3100-2RU (QFX3100 Base System (spare))

Questions & Answers

What are Juniper Switch Modules & Cards?

How do Juniper line cards differ from expansion modules?

Which Juniper switch modules are compatible with EX series?

How do I choose the right Juniper switch card for my network?