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Onie

  • Boot Loader

Cumulus Linux

  • NOS
  • Native Linux Distribution
  • Not Proprietary
  • Not Linux Like
  • Debain Wheezy

Distribution

  • Binary Packages
    • 250 Debian Packages
    • 10 Cumulus Packages
  • Cumulus Packages
    • Provide extra features and functiona
  • Repository
    • cumulus (repo.cumulusnetworks.com)
    • addon
      • Puppet
      • Chef
      • Collectd
      • Netshow
    • testing
      • Beta Release
      • Release Specific Features
      • Expiremental Applications
    • debain-community
      • 40,000+ Packages
      • KVM
      • Bandwidth Monitor
      • Not Officially Supported
  • Quagga
  • Bird

Automation

  • Ansible
    • Automate Network Configuration

Architecture

  • User Space
    • User Configures OSPF, BGP, Static Route
  • Linux Kernel
    • Route is added to Kernel via Netlink API
  • Switchd
    • Programs the Hardware
    • Netlink message is translated into a format that the Broadcom ASIC understands
    • Extracts information from Hardware

Cumulus VX

  • Cumulus VX helps you learn and become familiar with Cumulus Linux technology

Configuration

Defaults

  • Username: cumulus
  • Password CumulusLinux!
  • Interface eth0: Management
  • Interface lo: loopback

Interfaces

  • Create Network Interfaces
auto swp1
iface swp1

auto swp2
iface swp2
 bridge-access 100 #VLAN
  • Bring Interfaces Up
ifreload -a

Layer 2

  • Configure bridge
auto bridge
iface bridge
 bridge-vlan-aware yes
 bridge-ports swp1 swp2
 bridge pvid 1 #Default VLAN
 bridge-vids 100 200 #VLANs
 bridge-stp on
  • Show bridges
brctl show
  • Show spanning-tree
mstpctl showport bridge
mstpctl showbridge

Layer 3

 auto bridge.1
iface bridge.1
 address 10.1.1.1/24

auto bridge.100
iface bridge.100
 addrss 10.1.100.1/24

Install Cumulus Linux

Components

  • DHCP Server: Allocates IP address and provides a URL for the NOS image
  • HTTP Server: Hosts a onie-installer NOS image
  • Out-of-Band Switch: Connects the bare-metals with with the DHCP and HTTP server

DHCP

  • The configuration file can specifiy an image for specific switches
  • This is accomplished by creating a sybolic link from the Cululus Linux Installer binary to ./onie-installer on the HTTP server.
  • ONIE boots into a waterfall boot method, searching for an images version and architecture.

Commands

  • Show Switch Model
sudo decode-syseeprom
  • Show Hardware and Software
netshow system
  • Instruct uBoot to Boot ONIE
run onie_bootcmd

Access

  • Each ONIE switch has a Console and Management switchport.
  • The default Console port speed is 115200
  • SSH can be used to access the boot loader, ONIE, or NOS.
  • Root account SSH is disabled
  • The Cumulus account can gain administrative rights using the sudo command

License

  • Licenses are keyed by bandwidth
  • Install Cumulus Linux License
  • License can be hosted locally or from a URL
  • Switchd does a license checks when it starts
  • Cumulus Linux 2.5.3 can use the same license file for all switches.
  • Install a License File
sudo cl-license -i <URL>
  • Restart Switchd aft Install
service switchd restart
  • Show Installed License
sudo cl-license

Initial Config ZTP

  • Configure eth0 with a a static IP and default gateway
  • Reload interfaces
  • For true OoB the management interface eth0 can be converted to a MRF (VRF) or seperate routing table.
  • DHCP Option 239 provides a ZTP script
  • The switch checks for the existence of “CUMULUS-AUTOPROVISIONING” in the script
  • Put the provisioning line at the bottom so that the script is not corrupted
  • Once auto-provisioning runs it sets a flag so it does not run again

ZTP

  • Install License
  • Update and Upgrade Software
  • Install other Utilities
  • The MAC address is used for differentiating switch configuration