From d6acdfbe7574b956ab2c43d66676173b31fb52ef Mon Sep 17 00:00:00 2001 From: Damien Arnodo Date: Sun, 30 Nov 2025 08:53:58 +0000 Subject: [PATCH] Revert accidental commit to main - remove HOST_CONFIGURATION.md --- docs/HOST_CONFIGURATION.md | 135 ------------------------------------- 1 file changed, 135 deletions(-) delete mode 100644 docs/HOST_CONFIGURATION.md diff --git a/docs/HOST_CONFIGURATION.md b/docs/HOST_CONFIGURATION.md deleted file mode 100644 index 0b9206d..0000000 --- a/docs/HOST_CONFIGURATION.md +++ /dev/null @@ -1,135 +0,0 @@ -# Host Interface Configuration Summary - -## Overview -This document describes the persistent interface configuration approach for hosts in the Arista EVPN-VXLAN lab. - -## Configuration Method -Hosts use persistent `/etc/network/interfaces` files mounted via ContainerLab's `binds` feature. This ensures: -- Configuration persists across container restarts -- Clean deployments without manual post-configuration -- Proper LACP bonding with VLAN tagging on Alpine Linux hosts - -## Host Configurations - -### Host1 (VTEP1 - L2 VXLAN on VLAN 40) -- **Location**: configs/host1-interfaces -- **IP Address**: 10.40.40.101/24 -- **VLAN**: 40 (tagged) -- **Bonding**: LACP (802.3ad) using eth1 and eth2 -- **Connected to**: leaf1 (eth1) and leaf2 (eth1) - -### Host2 (VTEP2 - L3 VXLAN in VRF gold on VLAN 34) -- **Location**: configs/host2-interfaces -- **IP Address**: 10.34.34.102/24 -- **VLAN**: 34 (tagged) -- **Gateway**: 10.34.34.1 -- **Bonding**: LACP (802.3ad) using eth1 and eth2 -- **Connected to**: leaf3 (eth1) and leaf4 (eth1) - -### Host3 (VTEP3 - L2 VXLAN on VLAN 40) -- **Location**: configs/host3-interfaces -- **IP Address**: 10.40.40.103/24 -- **VLAN**: 40 (tagged) -- **Bonding**: LACP (802.3ad) using eth1 and eth2 -- **Connected to**: leaf5 (eth1) and leaf6 (eth1) - -### Host4 (VTEP4 - L3 VXLAN in VRF gold on VLAN 78) -- **Location**: configs/host4-interfaces -- **IP Address**: 10.78.78.104/24 -- **VLAN**: 78 (tagged) -- **Gateway**: 10.78.78.1 -- **Bonding**: LACP (802.3ad) using eth1 and eth2 -- **Connected to**: leaf7 (eth1) and leaf8 (eth1) - -## Interface File Structure -All host interface files follow this pattern: - -``` -auto lo -iface lo inet loopback - -auto bond0 -iface bond0 inet manual - use bond - bond-slaves eth1 eth2 - bond-mode 802.3ad - bond-miimon 100 - bond-lacp-rate fast - up ip link set $IFACE up - -auto bond0. -iface bond0. inet static - address - netmask 255.255.255.0 - [gateway ] # Only for L3 VXLAN hosts - vlan-raw-device bond0 - up ip link set $IFACE up -``` - -## Key Configuration Points - -### Alpine Linux Bonding Syntax -- Uses `use bond` directive (specific to ifupdown-ng in Alpine Linux) -- LACP mode configured via `bond-mode 802.3ad` -- Fast LACP rate for quicker failover detection - -### VLAN Tagging -- VLANs are tagged by the hosts using subinterfaces (bond0.40, bond0.34, bond0.78) -- Switch ports are configured in trunk mode, NOT access mode -- This prevents layer 2/3 mismatches that would break VXLAN connectivity - -### Topology Integration -The topology file (evpn-lab.clab.yml) mounts these files using binds: -```yaml -host1: - kind: linux - image: alpine:latest - binds: - - configs/host1-interfaces:/etc/network/interfaces -``` - -## Testing Connectivity - -### L2 VXLAN (VLAN 40) -Host1 and Host3 should be able to ping each other: -```bash -# From host1 -ping 10.40.40.103 - -# From host3 -ping 10.40.40.101 -``` - -### L3 VXLAN (VRF gold) -Host2 and Host4 should be able to ping each other: -```bash -# From host2 -ping 10.78.78.104 - -# From host4 -ping 10.34.34.102 -``` - -## Verification Commands - -### On hosts - Check bonding status: -```bash -cat /proc/net/bonding/bond0 -ip link show bond0 -ip addr show bond0. -``` - -### On leaf switches - Check MLAG port-channels: -```bash -show mlag interfaces -show port-channel summary -show interfaces status -``` - -### On leaf switches - Check VXLAN: -```bash -show vxlan vtep -show vxlan address-table -show bgp evpn route-type mac-ip -show bgp evpn route-type ip-prefix ipv4 -```