16  Configuration Examples

17 Configuration Examples

This directory contains example configurations for setting up the L3 datacenter network.

17.1 Files

17.1.1 frr-host-example.conf

FRR (Free Range Routing) configuration for a host. This configures: - BGP peering with both ToRs - Advertisement of host loopback /32 - Route learning from ToRs

Usage:

# Copy to /etc/frr/frr.conf on the host
# Adjust AS numbers, IPs, and host numbers for your setup
sudo cp frr-host-example.conf /etc/frr/frr.conf
sudo systemctl restart frr

17.1.2 frr-tor-example.conf

FRR configuration for a ToR switch. This configures: - BGP peering with hosts - BGP peering with spines - Route advertisement of host /32s to spines

Usage:

# Copy to /etc/frr/frr.conf on the ToR
# Adjust AS numbers, IPs, and neighbor lists for your setup
sudo cp frr-tor-example.conf /etc/frr/frr.conf
sudo systemctl restart frr

17.1.3 ovn-host-setup.sh

Script to configure OVN on a host using the loopback IP as the GENEVE Tunnel Endpoint (TEP).

Usage:

# Set your host loopback and OVN central IP
./ovn-host-setup.sh 10.255.1.11/32 10.254.0.100

17.1.4 network-setup-host.sh

Script to configure basic network interfaces on a host: - Loopback IP - Host-to-ToR links - Interface configuration

Usage:

# Set rack number and host number
./network-setup-host.sh 1 11

17.2 Customization

All configurations are examples and need to be customized for your specific: - IP address ranges - AS numbers - Interface names - Rack and host numbering - Spine count and IPs

17.3 Verification

After applying configurations, verify:

  1. BGP Status:

    vtysh -c "show ip bgp summary"
vtysh -c "show ip bgp"

  2. OVN Status:

    ovs-vsctl show
ovn-sbctl show

  3. Connectivity:

    ping -I <loopback> <remote-loopback>