Damien
6e0dcce746
- campus-spine1/2 (AS 66000): eBGP underlay + EVPN RR toward leafs and border leafs, addressing plan 10.1.x.x. - campus-leaf1/2 (VTEP1, AS 66001, VTEP 10.1.255.11): VLAN 50 (stretched L2 VXLAN, VNI 110050) and VLAN 60 (VRF gold anycast 10.60.60.1, L3 VNI 100001). - campus-leaf3/4 (VTEP2, AS 66002, VTEP 10.1.255.12): VLAN 50 and VLAN 70 (VRF gold anycast 10.60.70.1). - border-leaf-campus1/2 (AS 66005, VTEP 10.1.255.21): MLAG pair, OSPF + eBGP to cores, VRF gold stitched via vxlan vrf gold vni 100001 with RT 1:100001. - campus-access1/2: L2-only uplinks to campus leaf MLAG pairs, trunks VLAN 50+60 / 50+70. - campus-host1/2 interface files: bond0 + VLAN sub-interfaces for the stretched L2 VLAN 50 and the VRF gold subnets.
Host Interface Configuration Files
This directory contains network interface configuration files for Alpine Linux hosts in the ContainerLab topology.
Files
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)
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