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Document MTU 9000 jumbo frames configuration

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- Added MTU 9000 table showing all configured devices
- Added verification commands for checking MTU
- Added important note about bridge + physical interface MTU sync
- Mac Mini, PVE, PVE2, TrueNAS, and router all support jumbo frames

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Hutson
2025-12-21 11:16:42 -05:00
parent 99a65ae6f8
commit 9e887b15a4
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@@ -356,7 +356,32 @@ qm set VMID --net0 virtio,bridge=vmbr2
qm set VMID --net1 virtio,bridge=vmbr3 qm set VMID --net1 virtio,bridge=vmbr3
``` ```
- MTU 9000 (jumbo frames) on all bridges ### MTU 9000 (Jumbo Frames)
Jumbo frames are enabled across the network for improved throughput on large transfers.
| Device | Interface | MTU | Persistent |
|--------|-----------|-----|------------|
| Mac Mini | en0 | 9000 | Yes (networksetup) |
| PVE | vmbr0, enp1s0 | 9000 | Yes (/etc/network/interfaces) |
| PVE2 | vmbr0, nic1 | 9000 | Yes (/etc/network/interfaces) |
| TrueNAS | enp6s18, enp6s19 | 9000 | Yes |
| UCG-Fiber | br0 | 9216 | Yes (default) |
**Verify MTU:**
```bash
# Mac Mini
ifconfig en0 | grep mtu
# PVE/PVE2
ssh pve 'ip link show vmbr0 | grep mtu'
ssh pve2 'ip link show vmbr0 | grep mtu'
# Test jumbo frames
ping -c 1 -D -s 8000 10.10.10.120 # 8000 + 8 byte header = 8008 bytes
```
**Important:** When setting MTU on Proxmox bridges, ensure BOTH the bridge (vmbr0) AND the underlying physical interface (enp1s0/nic1) have the same MTU, otherwise packets will be dropped.
### Tailscale VPN ### Tailscale VPN