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.
84 lines
2.4 KiB
Markdown
84 lines
2.4 KiB
Markdown
# Host Interface Configuration Files
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This directory contains network interface configuration files for Alpine Linux hosts in the ContainerLab topology.
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## Files
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### DC hosts
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- `host1_interfaces` - Configuration for host1 (VLAN 40, IP 10.40.40.101)
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- `host2_interfaces` - Configuration for host2 (VLAN 34, IP 10.34.34.102)
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- `host3_interfaces` - Configuration for host3 (VLAN 40, IP 10.40.40.103)
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- `host4_interfaces` - Configuration for host4 (VLAN 78, IP 10.78.78.104)
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### Campus hosts
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- `campus-host1_interfaces` - Configuration for campus-host1 (VLAN 50 stretched L2 10.50.50.101, VLAN 60 VRF gold 10.60.60.101)
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- `campus-host2_interfaces` - Configuration for campus-host2 (VLAN 50 stretched L2 10.50.50.102, VLAN 70 VRF gold 10.60.70.102)
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## Usage
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Each file is mounted to `/etc/network/interfaces` in its respective host container via ContainerLab's `binds` feature:
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```yaml
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host1:
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kind: linux
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image: alpine:latest
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binds:
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- hosts/host1_interfaces:/etc/network/interfaces
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```
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## Format
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Files use Debian/Alpine ifupdown format with bonding and VLAN extensions:
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```
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auto lo
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iface lo inet loopback
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auto bond0
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iface bond0 inet manual
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bond-mode 4 # LACP (802.3ad)
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bond-miimon 100
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bond-lacp-rate 1
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bond-slaves eth1 eth2
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auto bond0.<vlan>
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iface bond0.<vlan> inet static
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address <ip-address>
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netmask 255.255.255.0
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vlan-raw-device bond0
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```
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## Key Concepts
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### LACP Bonding
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- All hosts use **mode 4** (802.3ad LACP) bonding
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- Dual-homed to MLAG leaf pairs for redundancy
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- Requires matching LACP configuration on switches
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### VLAN Tagging
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- Hosts handle VLAN tagging via sub-interfaces
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- Format: `bond0.<vlan_id>` (e.g., bond0.40, bond0.34, bond0.78)
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- Switch ports are configured as trunks allowing specific VLANs
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### IP Addressing
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- Static IP configuration on VLAN sub-interfaces
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- Subnet assignment based on VLAN ID pattern (e.g., VLAN 40 = 10.40.40.0/24)
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## Modification
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To change host configuration:
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1. Edit the appropriate `host*_interfaces` file
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2. Commit changes to git
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3. Redeploy the lab: `sudo containerlab deploy -t evpn-lab.clab.yml --reconfigure`
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No need to manually configure hosts after deployment - these files ensure clean, repeatable deployments.
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## See Also
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- [Main README](../README.md) - Project overview and quick start
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- [TROUBLESHOOTING.md](../TROUBLESHOOTING.md) - Troubleshooting guide
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- [END_TO_END_TESTING.md](../END_TO_END_TESTING.md) - Testing procedures
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