United States
Q
What are Juniper Router modules and cards?
A
Juniper Router modules and cards are hardware components—such as line cards, switch fabric cards, power supplies, and routing engines—that expand connectivity, performance, and functionality in Juniper routers.
Q
Which line cards are compatible with Juniper MX Series routers?
A
Juniper MX Series routers support MPC (MX Physical-CAP) and MIC (MX Interface Card) line cards; refer to the MX Series hardware guide for slot mapping and throughput compatibility.
Q
How do I install a line card in a Juniper router?
A
Shut down the router, remove the slot cover, insert the line card until it seats firmly, secure it with the provided screws, and power on; Junos OS will auto-detect the new module.
Q
How do I upgrade the firmware on a Juniper router module?
A
Upload the firmware package to the router and use Junos CLI commands: 'request system software add <package>' and 'request chassis firmware upgrade <module-name> <version>' after backing up configurations.
Q
What is a switch fabric card and why is it important?
A
A switch fabric card provides the high-speed backplane connectivity between line cards, ensuring packet forwarding throughput matches the router’s overall performance.
Q
How can I monitor the status of installed modules?
A
Use Junos CLI commands like 'show chassis hardware', 'show chassis fpc', and 'show chassis alarms' or Junos Space to view module status, temperature, and error conditions.
Q
What are power supply and fan tray modules?
A
Power supply modules deliver redundant AC or DC power and fan trays provide cooling; both are hot-swappable to ensure continuous operation under varied load conditions.
Q
What is the routing engine module and how does it function?
A
The routing engine module houses the control-plane CPU and memory, runs Junos OS, and manages routing protocols, system processes, and configuration tasks.
Q
How do I troubleshoot a failed module or card?
A
Check LED indicators, run 'show chassis alarms' and 'show system alarms' in the CLI, reseat the module, test with a known-good replacement, and collect logs for Juniper Support if needed.
Q
How do I select the right module for my network needs?
A
Assess required interface speeds, port density, throughput, slot compatibility, and budget, then consult Juniper’s compatibility matrix to match the optimal line card or module to your deployment.
Q
What licensing is required for additional modules?
A
Most hardware modules include perpetual base licenses; advanced features (such as subscriber density or MPLS) may require separate feature or universal licenses available from Juniper or partners.
Q
Are Juniper router modules hot-swappable?
A
Yes, the vast majority of Juniper router modules and cards are hot-swappable, allowing insertion or removal without powering down the chassis—verify specifics in the hardware documentation.
Q
What are the differences between 10GbE and 100GbE line cards?
A
10GbE line cards (XFP/SFP+) support up to 10 Gbps per port, while 100GbE cards (CFP2/QSFP28) provide up to 100 Gbps per port, offering higher throughput and port density for large-scale environments.
Q
How do I ensure compatibility between modules and chassis?
A
Review the router’s hardware documentation for supported module families, slot assignments, and power requirements, and use the Juniper compatibility matrix for validated module-chassis combinations.
Q
How do I order spare modules for network redundancy?
A
Provide your Juniper partner or Juniper order desk with the router model, chassis serial number, and exact part number of the module to procure identical spares for redundancy.
Q
How often should I perform maintenance on Juniper router modules?
A
Perform visual inspections and dust removal quarterly, run 'show chassis alarms' monthly, keep firmware up to date per release notes, and replace any failing modules immediately.
