sFlow role

This role facilitates the configuration of global and interface level sFlow attributes. It supports the configuration of sFlow collectors at the global level, enable/disable, and specification of sFlow polling-interval, sample-rate, max-datagram size, and so on are supported at the interface and global level. This role is abstracted for dellos9.

The dellos-sflow 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-sflow

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
• dellos_sflow (dictionary) contains keys along with interface name (dictionary)
• Interface name can correspond to any of the valid dellos9 physical interfaces with the unique interface identifier name
• Interface name must be in format; physical interface name can be in fortyGigE 1/1 format for dellos9 devices
• Variables and values are case-sensitive

dellos_sflow keys

Key	Type	Description	Support
sflow_enable	boolean: true,false*	Enables sFlow at a global level	dellos9
collector	list	Configures collector information (see collector.*); only two collectors can be configured on dellos9 devices	dellos9
collector.collector_ip	string (required)	Configures an IPv4/IPv6 address for the collector	dellos9
collector.agent_addr	string (required)	Configures an IPv4/IPv6 address for the sFlow agent to the collector	dellos9
collector.udp_port	integer	Configures UDP port range at the collector level (1 to 65535)	dellos9
collector.max_datagram_size	integer	Configures the maximum datagram size for the sFlow datagrams generated (400 to 1500)	dellos9
collector.vrf	boolean: true,false*	Configures the management VRF to reach collector if set to true; can be enabled only for IPv4 collector addresses	dellos9
polling_interval	integer	Configures the global default counter polling-interval (15 to 86400)	dellos9
sample_rate	integer	Configures the global default sample-rate (256 to 8388608)	dellos9
extended_switch	boolean: true,false*	Enables packing extended information for the switch if set to true	dellos9
max_header_size	boolean: true,false*	Enables extended header copy size of 256 bytes if set to true at the global level	dellos9

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

interface name keys

Key	Type	Notes
sflow_enable	boolean: true,false*	Enables sFlow at the interface level
ingress_enable	boolean: true,false*	Enables ingress sFlow at the interface level
polling_interval	integer	Configures the interface level default counter polling-interval (15 to 86400)
max_header_size	boolean: true,false*	Enables extended header copy size of 256 bytes if set to true at the interface level
sample_rate	integer	Configures the interface level default sample-rate (256 to 8388608)

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	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-sflow 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.dellos-sflow role to configure sFlow attributes at interface and global level. It 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. It writes a simple playbook that only references the dellos-sflow role. By including the role, you automatically get access to all of the tasks to configure sFlow features.

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_sflow:
  sflow_enable: true
  collector:
    - collector_ip: 1.1.1.1
      agent_addr: 2.2.2.2
      udp_port: 2
      max_datagram_size: 1000
      vrf: true
      state: present
  polling_interval: 30
  sample_rate: 1024
  extended_switch : true
  max_header_size: true
  fortyGigE 1/1:
    sflow_enable : true
    ingress_enable: true
    polling_interval: 30
    sample_rate: 1024
    max_header_size: true

Simple playbook to setup sflow - leaf.yaml

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

Run

ansible-playbook -i hosts leaf.yaml

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