Mikrotik: BFD Deteksi Link Failure: Difference between revisions

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  /system resource print
  /system resource print


{| class="wikitable"
|-
! RouterOS !! Status
|-
| v6.43+  || BFD tersedia
| v7.x    || BFD '''lebih stabil & recommended''
|}


| RouterOS | Status                            |
| -------- | ---------------------------------- |
| v6.43+  | BFD tersedia                      |
| v7.x    | BFD **lebih stabil & recommended** |


---


## 2️⃣ Konfigurasi BFD (WAJIB)
==2️⃣ Konfigurasi BFD (WAJIB)==


### Contoh Parameter Aman & Cepat
===Contoh Parameter Aman & Cepat===


```bash
/routing bfd configuration
add interfaces=ether1 min-tx=100ms min-rx=100ms multiplier=3
```


📌 Artinya:
/routing bfd configuration
add interfaces=ether1 min-tx=100ms min-rx=100ms multiplier=3
 
Artinya:


* Kirim paket tiap **100 ms**
* Kirim paket tiap **100 ms**
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⚠️ Jangan pakai <50ms di wireless jelek
⚠️ Jangan pakai <50ms di wireless jelek


---


## 3️⃣ Aktifkan BFD di Peer BGP (RouterOS v7)


```bash
==3️⃣ Aktifkan BFD di Peer BGP (RouterOS v7)==
/routing bgp connection
 
set [find name=peer-ISP] bfd=yes
 
```
/routing bgp connection
set [find name=peer-ISP] bfd=yes
 


Atau saat membuat peer:
Atau saat membuat peer:


```bash
/routing bgp connection
/routing bgp connection
add name=peer-ISP \
add name=peer-ISP \
    remote.address=192.168.10.1 \
    remote.address=192.168.10.1 \
    remote.as=65001 \
    remote.as=65001 \
    local.as=65000 \
    local.as=65000 \
    bfd=yes
    bfd=yes
```


---


## 4️⃣ (Opsional) Percepat Timer BGP
==4️⃣ (Opsional) Percepat Timer BGP==


Jika **tanpa BFD**, timer ini penting
* Jika **tanpa BFD**, timer ini penting
Jika **pakai BFD**, timer ini *backup only*
* Jika **pakai BFD**, timer ini ''backup only''


```bash
/routing bgp connection
/routing bgp connection
set peer-ISP keepalive-time=10s hold-time=30s
set peer-ISP keepalive-time=10s hold-time=30s
```


---


## 5️⃣ Verifikasi BFD (WAJIB)
==5️⃣ Verifikasi BFD (WAJIB)==


### Cek Status BFD
===Cek Status BFD===


```bash
/routing bfd session print
/routing bfd session print
```


Status normal:
Status normal:


```
state=up
state=up
```


Jika:
Jika:


```
state=down
state=down
```


➡️ BGP **langsung disconnect**
➡️ BGP **langsung disconnect**


---


## 6️⃣ Test Fast Failover


### Cara Aman Test
==6️⃣ Test Fast Failover==
 
===Cara Aman Test===


* Cabut kabel fiber
* Cabut kabel fiber
Line 111: Line 100:
Pantau:
Pantau:


```bash
/routing bgp session print
/routing bgp session print
/ip route print where bgp
/ip route print where bgp
```


⏱️ Harus turun **< 1 detik**


---
⏱️ Harus turun '''< 1 detik'''


## 7️⃣ Topologi Paling Umum (Dual Link)
 
==7️⃣ Topologi Paling Umum (Dual Link)==


![Image](https://data-discourse.cdn.mikrotik.com/original/3X/8/8/88994367cafc6525e7606588f6faad1b9a15b694.png?utm_source=chatgpt.com)
![Image](https://data-discourse.cdn.mikrotik.com/original/3X/8/8/88994367cafc6525e7606588f6faad1b9a15b694.png?utm_source=chatgpt.com)
Line 128: Line 115:
![Image](https://www.researchgate.net/publication/335142069/figure/fig3/AS%3A1095918434684930%401638298724943/OpenFlow-fast-failover-group-BFD-bidirectional-forwarding-detection-LOS-loss-of-signal.png?utm_source=chatgpt.com)
![Image](https://www.researchgate.net/publication/335142069/figure/fig3/AS%3A1095918434684930%401638298724943/OpenFlow-fast-failover-group-BFD-bidirectional-forwarding-detection-LOS-loss-of-signal.png?utm_source=chatgpt.com)


---


## 8️⃣ Best Practice BFD di MikroTik
 
==8️⃣ Best Practice BFD di MikroTik==


✔️ Gunakan **RouterOS v7**
✔️ Gunakan **RouterOS v7**
Line 137: Line 124:
✔️ Kombinasikan dengan **ECMP** bila multi-link
✔️ Kombinasikan dengan **ECMP** bila multi-link


---


## 🔥 Rekomendasi Setting Cepat & Stabil
==Rekomendasi Setting Cepat & Stabil==


```bash
/routing bfd configuration
/routing bfd configuration
add interfaces=ether1 min-tx=100ms min-rx=100ms multiplier=3
add interfaces=ether1 min-tx=100ms min-rx=100ms multiplier=3


/routing bgp connection
/routing bgp connection
set peer-ISP bfd=yes keepalive-time=10s hold-time=30s
set peer-ISP bfd=yes keepalive-time=10s hold-time=30s
```


---


## ⛔ Kesalahan Umum
==Kesalahan Umum==


❌ Lupa enable `bfd=yes` di BGP peer
❌ Lupa enable `bfd=yes` di BGP peer
❌ Timer BFD terlalu kecil → flapping
❌ Timer BFD terlalu kecil → flapping
❌ Peer ISP **tidak support BFD** (cek dulu!)
❌ Peer ISP '''tidak support BFD''' (cek dulu!)
 
---
 
## 🎯 Ringkasan
 
| Item          | Nilai                    |
| ------------- | ------------------------ |
| BFD detect    | 300 ms                  |
| BGP fallback  | 30 detik                |
| Failover real | < 1 detik                |
| Cocok untuk  | ISP, Kampus, DC, Tambang |
 
---


Kalau mau, saya bisa:


* Buat **template MikroTik v6 vs v7**
==Ringkasan==
* Sesuaikan **latency radio / fiber**
* Simulasi **dual ISP + ECMP**
* Bandingkan **BFD vs Netwatch vs Script**


Tinggal sebutkan:
{| class="wikitable"
👉 RouterOS versi
|-
👉 Jenis link (fiber / radio / LTE)
! Item          !! Nilai
👉 Single atau dual ISP
|-
| BFD detect    || 300 ms
| BGP fallback  || 30 detik
| Failover real || < 1 detik
| Cocok untuk  || ISP, Kampus, DC, Tambang
|}

Revision as of 11:46, 22 December 2025

Berikut **panduan lengkap & praktis setting BFD untuk BGP di MikroTik RouterOS** (v6 & v7), fokus ke **fast convergence saat link putus**.


Konsep Singkat (Penting)

  • BFD ≠ BGP BFD hanya **deteksi link mati super cepat** (ms)
  • BGP pakai hasil BFD Saat BFD *down* → **BGP langsung withdraw route**

Target:

  • ⏱️ **Default BGP:** 1–3 menit ❌
  • ⚡ **BGP + BFD:** < **300 ms** 🔥


1️⃣ Cek Versi RouterOS

/system resource print
RouterOS Status
v6.43+ BFD tersedia v7.x BFD 'lebih stabil & recommended


2️⃣ Konfigurasi BFD (WAJIB)

Contoh Parameter Aman & Cepat

/routing bfd configuration
add interfaces=ether1 min-tx=100ms min-rx=100ms multiplier=3

Artinya:

  • Kirim paket tiap **100 ms**
  • Deteksi mati: **300 ms**
  • Cocok untuk **fiber / radio bagus / LAN**

⚠️ Jangan pakai <50ms di wireless jelek


3️⃣ Aktifkan BFD di Peer BGP (RouterOS v7)

/routing bgp connection
set [find name=peer-ISP] bfd=yes


Atau saat membuat peer: 

/routing bgp connection
add name=peer-ISP \
    remote.address=192.168.10.1 \
    remote.as=65001 \
    local.as=65000 \
    bfd=yes


4️⃣ (Opsional) Percepat Timer BGP

  • Jika **tanpa BFD**, timer ini penting
  • Jika **pakai BFD**, timer ini backup only
/routing bgp connection
set peer-ISP keepalive-time=10s hold-time=30s


5️⃣ Verifikasi BFD (WAJIB)

Cek Status BFD

/routing bfd session print

Status normal: 

state=up

Jika: 

state=down

➡️ BGP **langsung disconnect**


6️⃣ Test Fast Failover

Cara Aman Test

  • Cabut kabel fiber
  • Shutdown interface upstream
  • Disable VLAN

Pantau: 

/routing bgp session print
/ip route print where bgp


⏱️ Harus turun < 1 detik


7️⃣ Topologi Paling Umum (Dual Link)

![Image](https://data-discourse.cdn.mikrotik.com/original/3X/8/8/88994367cafc6525e7606588f6faad1b9a15b694.png?utm_source=chatgpt.com)

![Image](https://i.imgur.com/huowhnq.png?utm_source=chatgpt.com)

![Image](https://www.researchgate.net/publication/335142069/figure/fig3/AS%3A1095918434684930%401638298724943/OpenFlow-fast-failover-group-BFD-bidirectional-forwarding-detection-LOS-loss-of-signal.png?utm_source=chatgpt.com)


8️⃣ Best Practice BFD di MikroTik

✔️ Gunakan **RouterOS v7** ✔️ Aktifkan **1 BFD per interface**, bukan per peer ✔️ Jangan terlalu agresif di wireless ✔️ Kombinasikan dengan **ECMP** bila multi-link


Rekomendasi Setting Cepat & Stabil

/routing bfd configuration
add interfaces=ether1 min-tx=100ms min-rx=100ms multiplier=3

/routing bgp connection
set peer-ISP bfd=yes keepalive-time=10s hold-time=30s


Kesalahan Umum

❌ Lupa enable `bfd=yes` di BGP peer ❌ Timer BFD terlalu kecil → flapping ❌ Peer ISP tidak support BFD (cek dulu!)


Ringkasan

Item Nilai
BFD detect 300 ms BGP fallback 30 detik Failover real < 1 detik Cocok untuk ISP, Kampus, DC, Tambang
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