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Junos (CLI modes and features (Commands (Configuration (Set, Delete,…

- - - - Shell supports many common unix commands
  - - - Monitor and troubleshoot the software/network/Hardware
    - - Configurae the device, including interfaces, protocols, user access and system hardware properties
  - - - Up n moves you up n levels
    - - Set
      - Delete
      - deactiviate
      - rename
      - replace
      - copy
      - insert
      - annotate
- - - - Sends the packet forwarding table to the Packet forwarding engine
  - - - Transit traffic is forwarding through the local system
        
        through the PFE
      - PFE uses the forwarding table provided by the RE
      - Examples of transit traffic include unicast and multicast traffic
      - Transit traffic never gets into the RE
    - - Is processed by the Local System.
        
        Is process by the RE CPU
        
        In most cases, the PFE processes traffic requiring the generation of ICMP messages such as TTL expire
        
        Exception traffic is rate-limited in the internal link between the PFE and RE. This provides some protection from DoS attacks
        
        Control traffic is given preference when congestion occurs (typically CS7/6)
        
        i.e. BGP session
        
        i.e. SSH session