Damien/arista-evpn-vxlan-clab
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27 Commits

Author SHA1 Message Date
Damien
3a9c7cd790 feat(configs): add static route for 100.64.0.0/10 subnet for Tailnet Access 
Update configuration files for all leaf and spine switches to include a
new static route for the 100.64.0.0/10 prefix.

The route points to the next-hop gateway 172.16.0.254, ensuring proper
reachability for the  Tailnet range across the network fabric.
 2025-12-22 18:06:08 +00:00
Damien
913135d966 refactor(configs): migrate management interface to Management0 
This commit updates the management interface configuration across all leaf and spine switches to align with the target environment requirements.

Changes include:
- Changing the primary management interface from `Management1` to `Management0`.
- Removing the `vrf mgmt` assignment, moving the interface to the default global routing table.
- Explicitly configuring `lldp management-address Management0` to ensure the correct management IP is advertised to neighbors.
 2025-12-17 20:10:12 +00:00
Damien
d9327ed95f feat(configs): enable gNMI API on all network devices 
Enables the gNMI (gRPC Network Management Interface) API across all leaf
and spine switches to allow for telemetry streaming and programmatic
device management.

Configuration details:
- Transport: grpc default
- Provider: eos-native
 2025-12-16 12:00:20 +00:00
Damien
bbcf2c9cb9 chore(configs): update admin password for spine switches 2025-12-14 19:26:39 +00:00
Damien
1080bf07bb Complete Lab Fixes - L2 and L3 VXLAN Fully Operational (#14) 
## Summary

This PR merges all fixes and improvements from the troubleshooting journey to make the Arista EVPN-VXLAN lab fully operational with both L2 and L3 VXLAN connectivity.

## What's Changed

### 🎯 Major Achievements
- ✅ **L2 VXLAN fully operational** - host1 ↔ host3 connectivity verified
- ✅ **L3 VXLAN fully operational** - host2 ↔ host4 connectivity verified (VRF gold)
- ✅ **LACP bonding working** - dual-homed hosts with proper Port-Channel negotiation
- ✅ **All BGP/EVPN sessions established** - complete underlay and overlay working

### 🔧 Infrastructure Fixes

#### BGP & Routing
- Added `ip routing` command to all spine and leaf switches
- Fixed duplicate BGP network statements on leaf3, leaf4, leaf7, leaf8
- Activated EVPN neighbors on spine switches
- Added loopback network advertisements to BGP

#### MLAG Configuration
- Configured MLAG peer-link in trunk mode (not access) for VLAN 4090/4091
- Added dual-active detection via management interface
- Configured virtual router MAC for MLAG pairs

#### Switch Port Configuration
- Port-Channel1 configured in **trunk mode** on all leaf switches
- Added `switchport trunk allowed vlan` for host VLANs (34, 40, 78)
- Removed `no shutdown` from Port-Channel interfaces

### 🖥️ Host Networking - Complete Redesign

#### Image Change
- **Old:** `alpine:latest` (had bonding syntax issues)
- **New:** `ghcr.io/hellt/network-multitool` (networking tools pre-installed)

#### LACP Bonding Configuration
Proper LACP setup following network-multitool best practices:
```yaml
- ip link add bond0 type bond mode 802.3ad
- ip link set dev bond0 type bond xmit_hash_policy layer3+4
- ip link set dev eth1 down
- ip link set dev eth2 down
- ip link set eth1 master bond0
- ip link set eth2 master bond0
- ip link set dev eth1 up
- ip link set dev eth2 up
- ip link set dev bond0 type bond lacp_rate fast
- ip link set dev bond0 up
```

#### VLAN Configuration
- **L2 VXLAN hosts (host1, host3):** VLAN 40 tagged on bond0
- **L3 VXLAN hosts (host2, host4):** VLANs 34 and 78 tagged on bond0

#### Routing Strategy
- Kept management default route (172.16.0.254 via eth0)
- Added **specific routes** for L3 VXLAN networks instead of default routes:
  - host2: `ip route add 10.78.78.0/24 via 10.34.34.1`
  - host4: `ip route add 10.34.34.0/24 via 10.78.78.1`

### 📁 Files Changed

#### Switch Configurations (Updated)
- `configs/spine1.cfg` - Added ip routing, EVPN activation
- `configs/spine2.cfg` - Added ip routing, EVPN activation
- `configs/leaf1.cfg` - Port-Channel trunk mode, VLAN config
- `configs/leaf2.cfg` - Port-Channel trunk mode, VLAN config
- `configs/leaf3.cfg` - Added ip routing, loopback ads, Port-Channel config
- `configs/leaf4.cfg` - Added ip routing, loopback ads, Port-Channel config
- `configs/leaf5.cfg` - Port-Channel trunk mode, VLAN config
- `configs/leaf6.cfg` - Port-Channel trunk mode, VLAN config
- `configs/leaf7.cfg` - Added ip routing, loopback ads, Port-Channel config
- `configs/leaf8.cfg` - Added ip routing, loopback ads, Port-Channel config

#### Topology (Updated)
- `evpn-lab.clab.yml` - Updated all host configurations with network-multitool image and proper LACP/VLAN setup

#### Documentation (New)
- `hosts/README.md` - Host interface configuration guide
- `hosts/host1_interfaces` - Interface file for host1 (not currently used, kept for reference)
- `hosts/host2_interfaces` - Interface file for host2 (not currently used, kept for reference)
- `hosts/host3_interfaces` - Interface file for host3 (not currently used, kept for reference)
- `hosts/host4_interfaces` - Interface file for host4 (not currently used, kept for reference)

## Testing & Verification

### ✅ L2 VXLAN (VLAN 40)
```
host1 (10.40.40.101) → host3 (10.40.40.103)
- Connectivity: VERIFIED ✓
- VXLAN tunnel: VTEP1 ↔ VTEP3
- MAC learning: Working via EVPN Type-2
```

### ✅ L3 VXLAN (VRF gold)
```
host2 (10.34.34.102) → host4 (10.78.78.104)
- Connectivity: VERIFIED ✓
- Ping results: 0% packet loss, TTL=62
- Routing: Via EVPN Type-5 through fabric
```

### ✅ Infrastructure Status
- BGP Underlay: All sessions ESTAB
- EVPN Overlay: All neighbors ESTAB
- MLAG: All 4 pairs operational
- Port-Channels: LACP negotiated on all hosts

## Related Issues

Fixes #1 - Lab deployment and configuration fixes
Fixes #2 - BGP EVPN neighbors stuck in Connect state
Fixes #3 - Ready for deployment with EVPN activation
Fixes #4 - Lab convergence in progress
Fixes #5 - BGP EVPN neighbors stuck in Active state
Fixes #11 - Host LACP bonding configuration
Fixes #13 - L3 VXLAN default route issue

## Key Technical Learnings

1. **Arista EOS requires explicit `ip routing`** before BGP can function
2. **MLAG peer-link must be trunk mode** to allow VLAN 4090/4091 traversal
3. **VLAN tagging location matters** - hosts tag, switches use trunk mode
4. **network-multitool image** superior to Alpine for LACP bonding
5. **Specific routes better than default routes** when management network present
6. **LACP rate fast** ensures quick negotiation with Arista switches

## Deployment

After merging, deploy with:
```bash
cd ~/arista-evpn-vxlan-clab
sudo containerlab destroy -t evpn-lab.clab.yml --cleanup
sudo containerlab deploy -t evpn-lab.clab.yml
```

No manual post-deployment configuration needed - everything works from initial deployment!

## Breaking Changes

⚠️ **Host image changed** from `alpine:latest` to `ghcr.io/hellt/network-multitool`
⚠️ **Host configuration completely redesigned** - old exec commands replaced

## Reviewers

@Damien - Please review and merge when ready

---

**This PR represents the complete troubleshooting journey and brings the lab to production-ready status with full L2 and L3 VXLAN functionality.** 🚀

Reviewed-on: #14
Co-authored-by: Damien <damien@arnodo.fr>
Co-committed-by: Damien <damien@arnodo.fr>
 2025-11-30 10:24:29 +00:00
Damien Arnodo
e6210267a6 Revert accidental commit to main - remove host4-interfaces 2025-11-30 08:53:44 +00:00
Damien Arnodo
67816b84a1 Revert accidental commit to main - remove host3-interfaces 2025-11-30 08:53:32 +00:00
Damien Arnodo
aef0890f34 Revert accidental commit to main - remove host2-interfaces 2025-11-30 08:53:21 +00:00
Damien Arnodo
0baec91037 Revert accidental commit to main - remove host interface files 2025-11-30 08:53:11 +00:00
Damien Arnodo
926ab47337 Add host4 interface configuration for LACP bonding with VLAN 78 2025-11-30 08:20:31 +00:00
Damien Arnodo
ce76b0c342 Add host3 interface configuration for LACP bonding with VLAN 40 2025-11-30 08:20:26 +00:00
Damien Arnodo
31e1e345cd Add host2 interface configuration for LACP bonding with VLAN 34 2025-11-30 08:20:21 +00:00
Damien Arnodo
050a529c68 Add host1 interface configuration for LACP bonding with VLAN 40 2025-11-30 08:20:16 +00:00
Damien Arnodo
62efe9fc93 Apply critical fix: Add ip routing command to spine2 
This enables BGP and IP forwarding on spine switches. Without this command,
BGP sessions cannot be established and routing is disabled. This is essential
for the underlay fabric to function properly.
 2025-11-28 09:27:19 +00:00
Damien Arnodo
41a7e5e9e3 Apply critical fix: Add ip routing command to spine1 
This enables BGP and IP forwarding on spine switches. Without this command,
BGP sessions cannot be established and routing is disabled. This is essential
for the underlay fabric to function properly.
 2025-11-28 09:27:03 +00:00
Damien
8c3eb7f2d2 Fix MLAG and host interface configuration 
Changed the channel-group mode to "on" on the host-facing interfaces.

Changed the bonding mode to balance-rr in the clab file.
 2025-11-28 09:15:36 +00:00
Damien
8a291426f9 Add admin user configuration to all devices 2025-11-21 12:09:23 +00:00
Damien Arnodo
944977510c Add leaf8 configuration with VRF gold and BGP border 2025-11-16 15:37:07 +00:00
Damien Arnodo
61824f2ddf Add leaf7 configuration with VRF gold and BGP border 2025-11-16 15:36:49 +00:00
Damien Arnodo
a1b87aabeb Add leaf6 configuration 2025-11-16 15:36:31 +00:00
Damien Arnodo
c90a104528 Add leaf5 configuration 2025-11-16 15:36:16 +00:00
Damien Arnodo
18f2f88440 Add leaf4 configuration with VRF gold 2025-11-16 15:36:02 +00:00
Damien Arnodo
2e025f7116 Add leaf3 configuration with VRF gold 2025-11-16 15:35:47 +00:00
Damien Arnodo
15d5d4017c Add leaf2 configuration 2025-11-16 15:35:29 +00:00
Damien Arnodo
471722f0b5 Add leaf1 configuration 2025-11-16 15:35:13 +00:00
Damien Arnodo
f7dc787960 Add spine2 configuration 2025-11-16 15:34:50 +00:00
Damien Arnodo
1d2b843d45 Add spine1 configuration 2025-11-16 15:34:37 +00:00