Damien
ff15e90b5c
- README: rewritten node inventory, AS map, addressing plan (management, Lo0/Lo1, P2P, hosts), VNI/RD/RT tables, control-plane summary and end-to-end Campus <-> DC test procedures through the Core (VRF gold stitching). - hosts/README: document the two new Campus host configurations. - assets/arista-evpn-fabric.svg: new three-zone layout (Campus, Core, DC) with legend. - evpn-lab.clab.yml.annotations.json: reposition nodes and add zone labels so the ContainerLab graph matches the extended topology.
Host Interface Configuration Files
This directory contains network interface configuration files for Alpine Linux hosts in the ContainerLab topology.
Files
DC hosts
host1_interfaces- Configuration for host1 (VLAN 40, IP 10.40.40.101)host2_interfaces- Configuration for host2 (VLAN 34, IP 10.34.34.102)host3_interfaces- Configuration for host3 (VLAN 40, IP 10.40.40.103)host4_interfaces- Configuration for host4 (VLAN 78, IP 10.78.78.104)
Campus hosts
campus-host1_interfaces- Configuration for campus-host1 (VLAN 50 stretched L2 10.50.50.101, VLAN 60 VRF gold 10.60.60.101)campus-host2_interfaces- Configuration for campus-host2 (VLAN 50 stretched L2 10.50.50.102, VLAN 70 VRF gold 10.60.70.102)
Usage
Each file is mounted to /etc/network/interfaces in its respective host container via ContainerLab's binds feature:
host1:
kind: linux
image: alpine:latest
binds:
- hosts/host1_interfaces:/etc/network/interfaces
Format
Files use Debian/Alpine ifupdown format with bonding and VLAN extensions:
auto lo
iface lo inet loopback
auto bond0
iface bond0 inet manual
bond-mode 4 # LACP (802.3ad)
bond-miimon 100
bond-lacp-rate 1
bond-slaves eth1 eth2
auto bond0.<vlan>
iface bond0.<vlan> inet static
address <ip-address>
netmask 255.255.255.0
vlan-raw-device bond0
Key Concepts
LACP Bonding
- All hosts use mode 4 (802.3ad LACP) bonding
- Dual-homed to MLAG leaf pairs for redundancy
- Requires matching LACP configuration on switches
VLAN Tagging
- Hosts handle VLAN tagging via sub-interfaces
- Format:
bond0.<vlan_id>(e.g., bond0.40, bond0.34, bond0.78) - Switch ports are configured as trunks allowing specific VLANs
IP Addressing
- Static IP configuration on VLAN sub-interfaces
- Subnet assignment based on VLAN ID pattern (e.g., VLAN 40 = 10.40.40.0/24)
Modification
To change host configuration:
- Edit the appropriate
host*_interfacesfile - Commit changes to git
- Redeploy the lab:
sudo containerlab deploy -t evpn-lab.clab.yml --reconfigure
No need to manually configure hosts after deployment - these files ensure clean, repeatable deployments.
See Also
- Main README - Project overview and quick start
- TROUBLESHOOTING.md - Troubleshooting guide
- END_TO_END_TESTING.md - Testing procedures