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IOS XR Software

  • IOS - Original
    • Monolithic operating system - everything in single bin file
    • All processes run in shared memory
    • Runs directly on the hardware
  • IOS-XE - Designed for ASR1000, similar to IOS but on Linux
    • Shares much of the base code with IOS
    • Uses a distributed architecture
    • IOSd instance on top of a Linux kernel
  • IOS-XR - Complete rewrite, multiprocess, multi-CPU, High availability
    • Incudes features important for a service provider
    • Command structure significantly different from IOS
    • Comes in two versions
      • 32-bit - Runs on top of the QNX Neutrino microkernel
      • 64-bit - Runs on a Linux kernel
 
IOS/IOS XE applies configurations as soon as it is entered, not persistent until its saved.
IOS-XR uses a two-stage commit system
 
IOS-XR core and add-on modules (PIE)
  • Packages are copied to the router and activated
  • Packages (including the base) can be upgraded individually
 
show install active shows software packages
show hw-module FPD shows firmware
 
Major Release . Minor Release . Maintenance Release
Installed from Admin mode
  1. copy tftp disk1/:ASR9K.MCAST.PIE.4.0.1
  1. Install Add
  1. Install Activate
  1. Install Commit / install rollback

Turboboot

Install IOS-XR from ROMMOM
Requires a vm file (bootable)
Default gateway is required
Rommon1>IP_Address=192.168.1.2
Rommon2>IP_SUBNET_MASK=255.255.255.0
Rommon3>TFTP_SERVER=192.168.1.10
Rommon4>DEFAULT_GATEWAY=192.168.1.1
Rommon5>unset BOOT
Rommon6>TURBOBOOT=on,disk0,format
Rommon7>sync
Rommon8>boot tftp://192.168.1.10/ios/hfr-mini-px.vm-4.0.0
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