ECMP role

This role facilitates the configuration of equal cost multi-path (ECMP). It supports the configuration of ECMP for IPv4, and is abstracted for dellos9 and dellos10.

The ECMP role requires an SSH connection for connectivity to a Dell EMC Networking device. You can use any of the built-in OS connection variables.

Installation

ansible-galaxy install Dell-Networking.dellos-ecmp

Role variables

• Role is abstracted using the ansible_network_os variable that can take the dellos9 value
• If dellos_cfg_generate is set to true, the variable generates the role configuration commands in a file
• Any role variable with a corresponding state variable set to absent negates the configuration of that variable
• Setting an empty value for any variable negates the corresponding configuration
• Variables and values are case-sensitive

dellos_ecmp keys

Key	Type	Description	Support
weighted_ecmp	boolean: true,false	Configures weighted ECMP	dellos9
ecmp_group_max_paths	integer	Configures the number of maximum-paths per ecmp-group	dellos9, dellos10
trigger_threshold	integer	Configures the number of link bundle utilization trigger-threshold	dellos10
ecmp_group_path_fallback	boolean: true,false	Configures ECMP group path management	dellos9
ecmp <group id>	dictionary	Configures ECMP group (see ecmp <group id>.*)	dellos9
ecmp <group id>.interface	list	Configures interface into an ECMP group	dellos9
ecmp <group id>.link_bundle_monitor	boolean: true,false	Configures link-bundle monitoring	dellos9
ecmp <group id>.state	string: present*,absent	Deletes the ECMP group if set to absent	dellos9

Connection variables

Ansible Dell EMC Networking roles require connection information to establish communication with the nodes in your inventory. This information can exist in the Ansible group_vars or host_vars directories or inventory, or in the playbook itself.

Key	Required	Choices	Description
ansible_host	yes		Specifies the hostname or address for connecting to the remote device over the specified transport
ansible_port	no		Specifies the port used to build the connection to the remote device; if value is unspecified, the ANSIBLE_REMOTE_PORT option is used; it defaults to 22
ansible_ssh_user	no		Specifies the username that authenticates the CLI login for the connection to the remote device; if value is unspecified, the ANSIBLE_REMOTE_USER environment variable value is used
ansible_ssh_pass	no		Specifies the password that authenticates the connection to the remote device
ansible_become	no	yes, no*	Instructs the module to enter privileged mode on the remote device before sending any commands; if value is unspecified, the ANSIBLE_BECOME environment variable value is used, and the device attempts to execute all commands in non-privileged mode
ansible_become_method	no	enable, sudo*	Instructs the module to allow the become method to be specified for handling privilege escalation; if value is unspecified, the ANSIBLE_BECOME_METHOD environment variable value is used
ansible_become_pass	no		Specifies the password to use if required to enter privileged mode on the remote device; if ansible_become is set to no this key is not applicable
ansible_network_os	yes	dellos6/dellos9/dellos10, null*	Loads the correct terminal and cliconf plugins to communicate with the remote device

NOTE: Asterisk (*) denotes the default value if none is specified.

Dependencies

The dellos-ecmp role is built on modules included in the core Ansible code. These modules were added in Ansible version 2.2.0.

Example playbook

This example uses the dellos-ecmp role to configure ECMP for IPv4. The example creates a hosts file with the switch details and corresponding variables. The hosts file should define the ansible_network_os variable with the corresponding Dell EMC Networking OS name.

When dellos_cfg_generate is set to true, the variable generates the configuration commands as a .part file in build_dir path. By default, the variable is set to false. The example writes a simple playbook that only references the dellos-ecmp role. The sample host_vars is provided for dellos9 only.

Sample hosts file

leaf1 ansible_host= <ip_address> 

Sample host_vars/leaf1

hostname: leaf1
ansible_become: yes
ansible_become_method: xxxxx
ansible_become_pass: xxxxx
ansible_ssh_user: xxxxx
ansible_ssh_pass: xxxxx
ansible_network_os: dellos9
build_dir: ../temp/dellos9
dellos_ecmp:
  ecmp 1:
    interface:
      - fortyGigE 1/49
      - fortyGigE 1/51
    link_bundle_monitor: true
    state: present
  weighted_ecmp: true
  ecmp_group_max_paths: 3
  ecmp_group_path_fallback: true

Simple playbook to setup system - leaf.yaml

- hosts: leaf1
  roles:
     - Dell-Networking.dellos-ecmp

Run

ansible-playbook -i hosts leaf.yaml

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