MLAG Role for EOS

The arista.eos-mlag role creates an abstraction for common MLAG configuration. This means that you do not need to write any ansible tasks. Simply create an object that matches the requirements below and this role will ingest that object and perform the necessary configuration.

Installation

ansible-galaxy install arista.eos-mlag

Requirements

Requires an SSH connection for connectivity to your Arista device. You can use any of the built-in eos connection variables, or the convenience provider dictionary.

Role Variables

The mlag dictionary includes the following keys described below:

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

Configuration Variables

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

Connection Variables

Ansible EOS roles require the following 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 in the playbook itself.

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

Ansible Variables

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

Dependencies

The eos-bridging role is built on modules included in the core Ansible code. These modules were added in ansible version 2.1

• Ansible 2.1.0

Example Playbook

The following example will use the arista.eos-mlag role to completely setup MLAG on two leaf switches without writing any tasks. We'll create a hosts file with our two leaf switches, then a corresponding host_vars file for each leaf and then a simple playbook which only references the mlag role. By including the role we automatically get access to all of the tasks to configure MLAG. What's nice about this is that if you have a host without MLAG configuration, the tasks will be skipped without any issue.

Sample hosts file:

[leafs]
leaf1.example.com
leaf2.example.com

Sample host_vars/leaf1.example.com

provider:
  host: "{{ inventory_hostname }}"
  username: admin
  password: admin
  use_ssl: no
  authorize: yes
  transport: cli

mlag:
  mlag_domain_id: mlag1
  mlag_trunk_group: mlagpeer
  mlag_shutdown: false
  local_if_vlan: Vlan1024
  local_if_vlan_description: Peer MLAG Link
  local_if_ip_address: 10.0.0.1/30
  local_if_disable_spanning_tree: true
  peer_address: 10.0.0.2
  peer_link_if: Port-Channel10
  peer_link_mode: trunk
  peer_link_lacp_mode: active
  peer_link_enable: true
  peer_link_members:
    - Ethernet3
    - Ethernet4

Sample host_vars/leaf2.example.com

host: "{{ inventory_hostname }}"
username: admin
password: admin
use_ssl: no
authorize: yes
transport: cli

no_log: true

mlag:
  mlag_domain_id: mlag1
  mlag_trunk_group: mlagpeer
  mlag_shutdown: false
  local_if_vlan: Vlan1024
  local_if_ip_address: 10.0.0.2/30
  local_if_disable_spanning_tree: true
  peer_address: 10.0.0.1
  peer_link_if: Port-Channel10
  peer_link_mode: trunk
  peer_link_lacp_mode: active
  peer_link_enable: true
  peer_link_members:
    - Ethernet3
    - Ethernet4

A simple playbook to enable MLAG on your leafs, leaf.yml

- hosts: leafs
  roles:
     - arista.eos-mlag

Then run with:

ansible-playbook -i hosts leaf.yml
​    

Developer Information

Development contributions are welcome. Please see Arista Roles for Ansible - Development Guidelines (test/arista-ansible-role-test/README) for additional information, including how to develop and run test cases for role development.

License

Copyright (c) 2015, Arista Networks EOS+ All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

• Neither the name of Arista nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Author Information

Please raise any issues using our GitHub repo or email us at ansible-dev@arista.com