Mikrotik: BFD Deteksi Link Failure: Difference between revisions

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




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==Konsep Singkat (Penting)==
==Konsep Singkat (Penting)==


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


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


==1️⃣ Cek Versi RouterOS==
==1️⃣ Cek Versi RouterOS==
Line 18: Line 16:
  /system resource print
  /system resource print


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


| RouterOS | Status                            |
==2️⃣ Konfigurasi BFD (WAJIB)==
| -------- | ---------------------------------- |
| v6.43+  | BFD tersedia                      |
| v7.x    | BFD **lebih stabil & recommended** |


---
===Contoh Parameter Aman & Cepat===


## 2️⃣ Konfigurasi BFD (WAJIB)


### Contoh Parameter Aman & Cepat
/routing bfd configuration
add interfaces=ether1 min-tx=100ms min-rx=100ms multiplier=3


```bash
Artinya:
/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'''


* Kirim paket tiap **100 ms**
⚠️ Jangan pakai <50ms di wireless jelek
* Deteksi mati: **300 ms**
* Cocok untuk **fiber / radio bagus / LAN**


⚠️ Jangan pakai <50ms di wireless jelek
==3️⃣ Aktifkan BFD di Peer BGP (RouterOS v7)==


---


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


```bash
/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==


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


* Cabut kabel fiber
* Cabut kabel fiber
Line 111: Line 93:
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**
 
---
 
## 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
⏱️ Harus turun '''< 1 detik'''


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


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


## 🔥 Rekomendasi Setting Cepat & Stabil
* https://data-discourse.cdn.mikrotik.com/original/3X/8/8/88994367cafc6525e7606588f6faad1b9a15b694.png


```bash
* https://i.imgur.com/huowhnq.png
/routing bfd configuration
add interfaces=ether1 min-tx=100ms min-rx=100ms multiplier=3


/routing bgp connection
* https://www.researchgate.net/publication/335142069/figure/fig3/AS%3A1095918434684930%401638298724943/OpenFlow-fast-failover-group-BFD-bidirectional-forwarding-detection-LOS-loss-of-signal.png
set peer-ISP bfd=yes keepalive-time=10s hold-time=30s
```


---
==8️⃣ Best Practice BFD di MikroTik==


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


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


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


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


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


---
==Kesalahan Umum==


Kalau mau, saya bisa:
* Lupa enable `bfd=yes` di BGP peer
* Timer BFD terlalu kecil → flapping
* Peer ISP '''tidak support BFD''' (cek dulu!)


* 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
|}

Latest revision as of 11:52, 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)

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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