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ACL flow-based monitor role

This role facilitates configuring ACL flow-based monitoring attributes. Flow-based mirroring is a mirroring session in which traffic matches specified policies that are mirrored to a destination port. Port-based mirroring maintains a database that contains all monitoring sessions (including port monitor sessions). This role is abstracted for Dell EMC PowerSwitch platforms running Dell EMC SmartFabric OS10.

The ACL flow-based role requires an SSH connection for connectivity to a Dell EMC SmartFabric OS10 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 the dellemc.os10.os10 as the value
  • If os10_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
  • os10_flow_monitor (dictionary) with session ID key (in session format; 1 to 18)
  • Variables and values are case-sensitive

session ID keys

Key Type Description Support
session_type string: local_*_,rspan-source,erspan-source Configures the monitoring session type os10
description string Configures the monitor session description os10
port_match list Displays a list of interfaces with location source and destination os10
port_match.interface_name string Configures the interface os10
port_match.location string: source,destination Configures the source/destination of an interface os10
port_match.state string: absent,present* Deletes the interface if set to absent os10
flow_based boolean Enables flow-based monitoring os10
shutdown string: up,down* Enable/disables the monitoring session os10
state string: absent,present* Deletes the monitoring session corresponding to the session ID if set to absent os10

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

Connection variables

Ansible Dell EMC network 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 os10, 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 os10_flow_monitor role to configure session monitor configuration. It creates a hosts file with the switch details and corresponding variables. The hosts file defines the anisble_network_os variable with corresponding Dell EMC OS10 name.

When os10_cfg_generate is set to true, the variable generates the configuration commands as a .part file in the build_dir path. By default, the variable is set to false. It writes a simple playbook that only references the os10_flow_monitor role.

Sample hosts file

leaf1 ansible_host= <ip_address>

Sample host_vars/leaf1

hostname: leaf1
ansible_ssh_user: xxxxx
ansible_ssh_pass: xxxxx
ansible_network_os: dellemc.os10.os10
build_dir: ../temp/os10
os10_flow_monitor:
  session 1:
    session_type: local
    description: "Discription goes here"
    port_match:
      - interface_name: ethernet 1/1/4
        location: source
        state: present
      - interface_name: ethernet 1/1/3
        location: destination
        state: present
    flow_based: true
    shutdown: up
    state: present
  session 2:
    session_type: local
    description: "Discription of session goes here"
    port_match:
      - interface_name: ethernet 1/1/6
        location: source
        state: present
      - interface_name: ethernet 1/1/7
        location: destination
        state: present
    flow_based: true
    shutdown: up
    state: present
  session 3:
    state: absent
os10_acl:
  - name: testflow
    type: ipv4
        description: testflow description
    extended: true
        entries:
            - number: 5
                permit: true
                protocol: icmp
                source: any
                destination: any
                other_options: capture session 1 count
                state: present
            - number: 10
                permit: true
                protocol: ip
                source: 102.1.1.0/24
                destination: any
                other_option: capture session 1 count byte
                state: present
            - number: 15
                permit: false
                protocol: udp
                source: any
                destination: any
                other_options: capture session 2 count byte
                state: present
            - number: 20
                permit: false
                protocol: tcp
                source: any
                destination: any
                other_options: capture session 2 count byte
                state: present
            stage_ingress:
            - name: ethernet 1/1/1
                state: present

NOTE: Destination port should not be an L2/L3 port which can be configured using the os10_interface role.

Simple playbook to setup system — leaf.yaml

- hosts: leaf1
  roles:
     - dellemc.os10.os10_flow_monitor
     - dellemc.os10.os10_acl

Run

ansible-playbook -i hosts leaf.yaml

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