QoS role

This role facilitates the configuration of quality of service (QoS) attributes like policy-map and class-map. This role is abstracted for Dell EMC PowerSwitch platforms running Dell EMC OS6.

The QoS role requires an SSH connection for connectivity to a Dell EMC OS6 device. You can use any of the built-in OS connection variables.

Role variables

Role is abstracted using the ansible_network_os variable that can take a dellemc.os6.os6 as a value
If os6_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

os6_qos keys

Key	Type	Description	Support
`policy_map`	list	Configures the policy-map (see `policy_map.*`)	os6
`policy_map.name`	string (required)	Configures the policy-map name	os6
`policy_map.type`	string: in, out in os6	Configures the policy-map type	os6
`policy_map.class_instances`	list	Specifies the class instances for the policy	os6
`class_instances.name`	string	Specifies name of class instance	os6
`class_instances.policy`	list	Specifies list of associated policies for the class	os6
`policy_map.state`	string: present*,absent	Deletes the policy-map if set to absent	os6
`class_map`	list	Configures the class-map (see `class_map.*`)	os6
`class_map.name`	string (required)	Configures the class-map name	os6
`class_map.type`	string: match-all, match-any in os6	Configures the class-map type	os6
`class-map.match_condition`	list	Specifies the type of match-conditions required for the class	os6
`class_map.state`	string: present*,absent	Deletes the class-map if set to absent	os6

Note

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

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	os6, null*	Loads the correct terminal and cliconf plugins to communicate with the remote device

Note

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

Example playbook

This example uses the os6_qos role to configure the policy-map class-map. It creates a hosts file with the switch details and corresponding variables. The hosts file should define the ansible_network_os variable with corresponding Dell EMC OS6 name.

When os6_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. It writes a simple playbook that only references the os6_qos role. By including the role, you automatically get access to all of the tasks to configure QoS features.

Sample hosts file

switch1 ansible_host= <ip_address>

Sample host_vars/switch1

hostname: switch1
ansible_become: yes
ansible_become_method: enable
ansible_ssh_user: xxxxx
ansible_ssh_pass: xxxxx
ansible_network_os: dellemc.os6.os6
build_dir: ../temp/temp_os6
  
os6_qos:
  policy_map:
    - name: testpolicy
      type: qos
      class_instances:
        - name: video
          policy:
            - assign-queue 1
      state: present
  class_map:
    - name: testclass
      type: application
      match_condition:
        - ip dscp 26
      state: present

Simple playbook to setup qos — switch1.yaml

- hosts: switch1
  roles:
     - dellemc.os6.os6_qos

Run

ansible-playbook -i hosts switch1.yaml