Ansible Role: cnos-vlag-1tier-leaf - Single Layer vLAG Leaf Configuration

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Role Description:

This Ansible role is used to set up a single layer vLAG (Virtual Link Aggregation Group) configuration. It is designed for access switches that connect to vLAG peers, which we will call leaf switches.

The role uses templates that are applied to configure the leaf switches, with different settings for each one since there are two leaf switches.

Tasks in the playbook will run or be skipped based on the flag settings for each IP address.

You can check the configuration commands and their results in the commands and results folders.

For more information, visit Configuring a single layer vLAG network.

Requirements

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Role Requirements:

• Ansible version 2.3 or newer (Ansible installation guide)
• Lenovo switches with CNOS version 10.2.1.0 or higher
• SSH access to the Lenovo switch (SSH must be enabled)

Role Variables

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Role Variables:

Here are the required inventory variables:

Variable	Description
ansible_connection	Must be set to network_cli
ansible_network_os	Must be set to enos
ansible_ssh_user	The username to log into the switch
ansible_ssh_pass	The password to log into the switch

Make sure to adjust these variables to fit your situation. You can find these variables in the vars directory of the role, specifically in the main.yml file.

To change the values in main.yml, use this format:

<template variable>:<value>

Replace <value> with your specific setting, but keep <template variable> as is.

Here’s a list of available variables:

Variable	Description
username	Username for switch login
password	Password for switch login
flag	Condition flag for the switch
stp_mode1	Configures the STP mode (mst - MSTP, rapid-pvst - Rapid PVST+, disable - STP off)
port_range1	Ethernet port range
portchannel_interface_number1	LAG number (1-4096)
portchannel_mode1	LAG type (on - static LAG, active - active member of a LACP LAG, passive - passive member of a LACP LAG)
slot_chassis_number1	Ethernet port (slot number/port number)
switchport_mode1	Switch port mode (access - single VLAN, trunk - multiple VLANs)

Dependencies

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Role Dependencies:

• username.iptables - Sets up the firewall, allowing only necessary web and SSH ports.
• username.common - Handles common server settings.
• /etc/ansible/hosts - Modify this file to include your leaf switches' information. You can use the cnos-vlag-1tier-leaf-hosts as a sample.

Ansible needs a hosts file to manage network elements. This file must be set up before running a playbook.

Open the /etc/ansible/hosts file with root access. You can comment out sections using #. Copy the role's content into this file from the main directory.

Example host entries might look like this:

[cnos-vlag-1tier-leaf]
10.240.178.74   ansible_network_os=cnos ansible_ssh_user=<username> ansible_ssh_pass=<password> deviceType=g8272_cnos condition=leaf_switch1
10.240.178.75   ansible_network_os=cnos ansible_ssh_user=<username> ansible_ssh_pass=<password> deviceType=g8272_cnos condition=leaf_switch2

Note: Update the IP addresses and replace <username> and <password> with your actual login details.

Example Playbook

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Sample Playbook:

To run an Ansible playbook, use this command:

ansible-playbook cnos-vlag-1tier-leaf.yml -vvv

The -vvv option will give you detailed output about what happens during playbook execution. The playbook files for this role are found in its main directory.

```

• hosts: cnos-vlag-1tier-leaf roles:
  • cnos-vlag-1tier-leaf

```

License

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License Information:

Copyright (C) 2017 Lenovo, Inc.

This file is licensed under the Apache License, Version 2.0 (the "License"). You may not use this file unless in accordance with the License. The License can be found at:

http://www.apache.org/licenses/LICENSE-2.0

Software under the License is provided "AS IS", without warranties or conditions of any kind, either express or implied. See the License for details on rights and limitations.