🔧 BDCOM Configuration

Configure VLANs on BDCOM GPON OLT to manage multi-service delivery including PPPoE, hotspot, and customer-specific traffic. This guide covers ONU type templates, VLAN creation, flow mapping, and uplink port configuration for carrier-grade GPON networks.

Key Concepts

GPON - Gigabit Passive Optical Network with passive splitters
ONU Type Template - Profile matching specific ONU models (HGU, SFU, etc.)
Flow Mapping - Maps UNI ports to virtual ports and VLANs
Tcont - Traffic Container for bandwidth allocation
Virtual Port - Logical port on ONU for service mapping
Dot1q-tunnel - Provider VLAN mode for uplinks

Prerequisites

Before configuring BDCOM OLT, ensure you have:

✅ BDCOM GPON OLT (GP3600-04L or similar) with SSH access
✅ Management IP configured (e.g., 192.168.0.1)
✅ VLAN plan documented (VLAN 40, 100-200)
✅ Uplink connectivity to MikroTik/core router
✅ ONU models identified (HGU, SFU, ZTE, etc.)
✅ Backup of current configuration

Important Considerations

ONU Type Precedence: Lower precedence values are matched first (ZTE = 126, HGU = 127, default = 128)
Flow Mapping: Entry 1 is required; additional entries support multi-VLAN per UNI
Tcont Type 3: For guaranteed + burst bandwidth (assured + peak rate)
Storm Control: Set low thresholds (5 fps) to prevent network flooding
Dot1q-tunnel: Allows Q-in-Q VLAN stacking for ISP aggregation

Understanding BDCOM Architecture

Network Topology

[Internet] ──── [MikroTik Router] ──── [BDCOM GPON OLT] ──── [ONUs] ──── [Customers]
                      │                  (GP3600-04L)        │
                      │                      │                └─ VLAN 40: PPPoE
                      │                  Gig 0/1-0/4         └─ VLAN 100-200: Customers
                      │                  GPON 0/1-0/4        └─ VLAN 200: Hotspot

VLAN Design

VLAN ID	Name	Purpose	Uplink Port	ONU Type
1	Native	Management	Gig 0/0	Management only
10	ISP-Mgmt	ISP management	Gig 0/1-0/4	All ONUs
40	PPPoE	PPPoE subscribers	TGig 0/1-0/2	HGU/SFU
100-200	Customer	Per-customer VLANs	TGig 0/1-0/2	HGU/SFU
200	Hotspot	Guest access	TGig 0/3-0/4	All ONUs

Port Configuration

Interface	Type	Mode	Purpose	Storm Control
Gig 0/0	Management	IP interface	OLT management (192.168.0.1/24)	N/A
Gig 0/1-0/4	Uplink	dot1q-tunnel	Provider VLAN uplinks	5 fps
TGig 0/1-0/2	Uplink	dot1q-tunnel	10G uplink (PPPoE + Customer)	5 fps
TGig 0/3-0/4	Uplink	dot1q-tunnel	10G uplink (Hotspot)	5 fps
GPON 0/1-0/4	PON	GPON	ONU connections	5 fps

Configuration

Step 1: Create ONU Type Templates

# HGU (4-port Ethernet) template for main subscribers
gpon onutype-template onutype-default-hgu
 gpon-onutype match ctc-onu-type HGU
 gpon-onutype config tcont-virtual-port-bind-profile tvbind-default
 gpon-onutype config flow-mapping-profile flow-mapping-default-hgu
exit

# Generic default template for fallback
gpon onutype-template onutype-default
 gpon-onutype config tcont-virtual-port-bind-profile tvbind-default
 gpon-onutype config flow-mapping-profile flow-mapping-default
exit

# ZTE-specific template (F670LV10P.0 model)
gpon onutype-template zte
 gpon-onutype match vendorid ZTEG modelid F670LV10P.0
 gpon-onutype match ctc-onu-type HGU
 gpon-onutype config tcont-virtual-port-bind-profile tvbind-default
 gpon-onutype config flow-mapping-profile test_vlan99
exit

Step 2: Create GPON Profiles (Bandwidth & Virtual Ports)

# Tcont Profile: 512 Kbps assured, 1 Gbps peak
gpon profile onu-tcont tcont-default id 1
 gpon-profile tcont-type 3 pir 1024000 cir 512
exit

# Virtual Port: 8 upstream/downstream queues
gpon profile onu-virtual-port virtual-port-default id 1
 gpon-profile encryption disable
 gpon-profile upstream queue 8
 gpon-profile downstream queue 8
exit

# Bind Tcont + Virtual Port
gpon profile onu-tcont-virtual-port-bind tvbind-default id 1
 gpon-profile virtual-port 1 profile virtual-port-default tcont 1 profile tcont-default
exit

# Rate Limit: 1.2 Gbps PIR/CIR
gpon profile onu-rate-limit ratelimit-default id 1
 gpon-profile pir 1244160 cir 1244160
exit

Step 3: Create Flow Mapping Profiles (VLAN Mapping)

# Default: All Ethernet UNIs to virtual port 1 (untagged)
gpon profile onu-flow-mapping flow-mapping-default id 1
 gpon-profile entry 1 uni type eth-uni all
 gpon-profile entry 1 virtual-port 1
exit

# HGU: VEIP (Virtual Ethernet Interface Port) untagged
gpon profile onu-flow-mapping flow-mapping-default-hgu id 2
 gpon-profile entry 1 uni type veip all
 gpon-profile entry 1 virtual-port 1
exit

# VLAN 99 transparent mapping
gpon profile onu-flow-mapping flow-mapping-vlan99 id 3
 gpon-profile entry 1 uni type eth-uni all
 gpon-profile entry 1 vlan 99
 gpon-profile entry 1 virtual-port 1
exit

# VLAN trunk (10-20): Multiple VLANs transparent
gpon profile onu-flow-mapping flow-mapping-trunk id 4
 gpon-profile entry 1 uni type eth-uni all
 gpon-profile entry 1 vlan 10-20
 gpon-profile entry 1 virtual-port 1
exit

# VLAN 40 (PPPoE): Single VLAN transparent
gpon profile onu-flow-mapping flow-mapping-pppoe id 5
 gpon-profile entry 1 uni type eth-uni all
 gpon-profile entry 1 vlan 40
 gpon-profile entry 1 virtual-port 1
exit

# VLAN 100-200 (Customer): VLAN range transparent
gpon profile onu-flow-mapping flow-mapping-customer id 6
 gpon-profile entry 1 uni type eth-uni all
 gpon-profile entry 1 vlan 100-200
 gpon-profile entry 1 virtual-port 1
exit

# VLAN 200 (Hotspot): Single VLAN transparent
gpon profile onu-flow-mapping flow-mapping-hotspot id 7
 gpon-profile entry 1 uni type eth-uni all
 gpon-profile entry 1 vlan 200
 gpon-profile entry 1 virtual-port 1
exit

Step 4: Create VLANs

configure terminal

# Create VLAN range
vlan 1,10-100

exit

Step 5: Configure Gigabit Uplink Ports (Dot1q-tunnel)

configure terminal

# Gig 0/1 - Primary uplink
interface GigaEthernet0/1
 switchport mode dot1q-tunnel-uplink
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

# Gig 0/2 - Secondary uplink
interface GigaEthernet0/2
 switchport mode dot1q-tunnel-uplink
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

# Gig 0/3 - Tertiary uplink
interface GigaEthernet0/3
 switchport mode dot1q-tunnel-uplink
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

# Gig 0/4 - Quaternary uplink
interface GigaEthernet0/4
 switchport mode dot1q-tunnel-uplink
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

exit

Step 6: Configure 10G Uplink Ports (Dot1q-tunnel)

configure terminal

# TGig 0/1 - 10G uplink (PPPoE + Customers)
interface TGigaEthernet0/1
 switchport mode dot1q-tunnel-uplink
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

# TGig 0/2 - 10G uplink redundancy
interface TGigaEthernet0/2
 switchport mode dot1q-tunnel-uplink
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

# TGig 0/3 - 10G uplink (Hotspot)
interface TGigaEthernet0/3
 switchport mode dot1q-tunnel-uplink
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

# TGig 0/4 - 10G uplink redundancy
interface TGigaEthernet0/4
 switchport mode dot1q-tunnel-uplink
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

exit

Step 7: Configure GPON Ports with ONU Type Binding

configure terminal

# GPON 0/1 - HGU/Default ONUs
interface GPON0/1
 gpon bind-onutype onutype-default-hgu precedence 127
 gpon bind-onutype onutype-default precedence 128
 switchport protected 1
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

# GPON 0/2 - ZTE preferred, with auto-fallback
interface GPON0/2
 gpon bind-onutype zte precedence 126
 gpon bind-onutype onutype-default-hgu precedence 127
 gpon bind-onutype onutype-default precedence 128
 switchport protected 1
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

# GPON 0/3 - HGU/Default ONUs
interface GPON0/3
 gpon bind-onutype onutype-default-hgu precedence 127
 gpon bind-onutype onutype-default precedence 128
 switchport protected 1
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

# GPON 0/4 - HGU/Default ONUs
interface GPON0/4
 gpon bind-onutype onutype-default-hgu precedence 127
 gpon bind-onutype onutype-default precedence 128
 switchport protected 1
 storm-control broadcast threshold 5
 storm-control multicast threshold 5
 storm-control unicast threshold 5
exit

exit

Step 8: Configure Management

configure terminal

# Management IP (Gig 0/0)
interface GigaEthernet0/0
 ip address 192.168.0.1 255.255.255.0
exit

# Admin user
username admin password 0 admin

# SNMP community
snmp-server community 0 nmscloud RW

exit

Understanding BDCOM Concepts

ONU Type Matching Precedence

Precedence	Type	Example	Priority
126	Vendor-specific	ZTE F670LV10P.0	Highest (matched first)
127	HGU (4-port)	Generic HGU models	Medium
128	Default fallback	Any ONU type	Lowest (last resort)

Lower precedence = higher priority for matching

Flow Mapping Entry Structure

gpon profile onu-flow-mapping <profile-name> id <id>
 gpon-profile entry 1 uni type <eth-uni|veip|pots> all
 gpon-profile entry 1 vlan <single|range>
 gpon-profile entry 1 virtual-port <number>
exit

uni type eth-uni: Ethernet ports (LAN)
uni type veip: Virtual Ethernet Interface (HGU mode)
uni type pots: Plain Old Telephone Service (VoIP)
vlan: Single (e.g., 40) or range (e.g., 100-200)
virtual-port 1: Bind to virtual-port 1 (must exist in tvbind profile)

Tcont Types

Type	Description	CIR	PIR	Use Case
1	Fixed	Max only	Max	Unused
2	Assured	Guaranteed	Max	Bandwidth guarantee
3	Non-assured	Assured	Peak	Hybrid (guaranteed + burst)
4	Best effort	None	Max	No guarantee

Type 3 (tcont-type 3): Most common - guarantees CIR (512 Kbps) with peak PIR (1 Gbps)

Verification

Step 1: Check ONU Type Templates

# Show all ONU type templates
show gpon onutype-template

# Show specific template
show gpon onutype-template onutype-default-hgu

# Expected: Template with flow-mapping and tcont bindings

Step 2: Check GPON Profiles

# Show all GPON profiles
show gpon profile all

# Show flow mapping profile
show gpon profile onu-flow-mapping flow-mapping-default

# Show tcont profile
show gpon profile onu-tcont tcont-default

Step 3: Check ONU Registration

# List all ONUs
show gpon onu

# Show specific ONU details
show gpon onu GPON0/1:1 detail

# Expected: ONU in online state with correct template applied

Step 4: Check Port Configuration

# Show interface status
show interface GigaEthernet0/1

# Show GPON port status
show interface GPON0/1

# Check storm control
show interface GigaEthernet0/1 | include storm

Step 5: Check VLAN Database

# Show all VLANs
show vlan

# Expected: VLAN 1, 10-100 present

Troubleshooting

Issue	Cause	Solution
ONU not registering	ONU type template not matching	Verify vendor ID/model in template matches ONU
ONU stuck in "O5" state	Flow mapping profile missing	Check flow-mapping-profile is configured in template
Customer VLAN not working	VLAN not in flow-mapping entry	Add VLAN to `gpon profile onu-flow-mapping` entry
High CPU on OLT	Storm control threshold too high	Lower `threshold 5` or disable on uplinks
GPON0/1 flapping	Fiber signal issue	Check optical power: `show gpon onu optical-power GPON0/1:1`
ONU loses VLAN tagging	UNI type mismatch (eth-uni vs veip)	Verify correct `uni type` for ONU model in flow-mapping
Uplink congestion	Dot1q-tunnel not active	Verify `switchport mode dot1q-tunnel-uplink` on all uplinks
ONU gets wrong ONU type	Precedence misconfigured	Lower precedence = higher priority; check `precedence` values
Port flapping	Duplex/speed mismatch	Set `speed 1000` or `speed 10000` as needed

Advanced Configuration Options

1. Bind Specific ONU by Serial Number

configure terminal

interface GPON0/2
 gpon bind-onu sn ZTEG:D1B052C5 1
exit

exit

2. Create Multi-Entry Flow Mapping (Multiple VLANs per UNI)

gpon profile onu-flow-mapping flow-mapping-multi-vlan id 8
 # Entry 1: UNI 1 → VLAN 40 (PPPoE)
 gpon-profile entry 1 uni type eth-uni 1
 gpon-profile entry 1 vlan 40
 gpon-profile entry 1 virtual-port 1
 
 # Entry 2: UNI 2-4 → VLAN 100-200 (Customer)
 gpon-profile entry 2 uni type eth-uni 2-4
 gpon-profile entry 2 vlan 100-200
 gpon-profile entry 2 virtual-port 1
exit

3. Create Multiple Tcont Profiles (Different Bandwidth)

# High-speed profile: 10 Mbps assured, 1 Gbps peak
gpon profile onu-tcont tcont-premium id 2
 gpon-profile tcont-type 3 pir 1024000 cir 10240
exit

# Standard profile: 512 Kbps assured, 1 Gbps peak
gpon profile onu-tcont tcont-standard id 1
 gpon-profile tcont-type 3 pir 1024000 cir 512
exit

4. Enable IGMP Snooping for IPTV

configure terminal

ip igmp snooping

exit

5. Configure SNMP Traps

configure terminal

snmp-server trap-server 192.168.0.100
snmp-server trap-version v2c nmscloud

exit

6. Set LLDP (Link Layer Discovery Protocol)

configure terminal

lldp run

exit

7. Enable Spanning Tree

configure terminal

spanning-tree mode rstp

exit

8. Create QoS Profile

gpon profile onu-rate-limit ratelimit-business id 2
 gpon-profile pir 5242880 cir 2097152
exit

ONU Provisioning Example

Complete ONU Setup (GPON0/1)

configure terminal

# Bind ONU to GPON0/1
interface GPON0/1
 gpon bind-onutype onutype-default-hgu precedence 127
 gpon bind-onutype onutype-default precedence 128
exit

# When ONU registers automatically, verify
show gpon onu GPON0/1:1 detail

# To manually add ONU by serial (if auto-discovery disabled)
interface GPON0/1
 gpon bind-onu sn ZTEG:AABBCCDD 1
exit

exit

MikroTik Integration

Router Configuration for BDCOM VLANs

# Create VLAN 40 (PPPoE) interface
/interface vlan add name=vlan40-pppoe vlan-id=40 interface=ether1

# Create VLAN 100-200 customer interfaces
/interface vlan add name=vlan100 vlan-id=100 interface=ether1
/interface vlan add name=vlan200 vlan-id=200 interface=ether1

# Configure PPPoE VLAN
/ip address add address=10.0.40.1/24 interface=vlan40-pppoe
/interface pppoe-server server add service-name=bdcom interface=vlan40-pppoe

# Configure customer VLANs
/ip address add address=10.0.100.1/24 interface=vlan100
/ip address add address=10.0.200.1/24 interface=vlan200

# DHCP for hotspot (VLAN 200)
/ip dhcp-server add name=hotspot200 interface=vlan200 address-pool=pool-hotspot
/ip dhcp-server network add address=10.0.200.0/24 gateway=10.0.200.1 dns-server=8.8.8.8

Monitoring and Maintenance

Daily Health Checks

# Check ONU status
show gpon onu

# Check OLT system info
show system

# Check port utilization
show interface counters

# Check fiber signal quality
show gpon onu optical-power GPON0/1:all

# Expected: Rx Power between -20 dBm and -10 dBm

Backup Configuration

configure terminal

# Save running config
write memory

# Or backup to TFTP
copy running-config tftp://192.168.0.100/bdcom-backup.conf

exit

GPON VLAN Configuration - Compare GPON OLT architecture
EPON VLAN Configuration - EPON alternative to GPON
VLAN Fundamentals - Understanding VLANs and tagging
Routing Basics - Inter-VLAN routing on MikroTik

✅ BDCOM GPON OLT with VLAN 40 (PPPoE), VLAN 100-200 (Customers), and VLAN 200 (Hotspot) is configured and ready for ONU provisioning!

Prerequisites​

Understanding BDCOM Architecture​

Network Topology​

VLAN Design​

Port Configuration​

Configuration​

Step 1: Create ONU Type Templates​

Step 2: Create GPON Profiles (Bandwidth & Virtual Ports)​

Step 3: Create Flow Mapping Profiles (VLAN Mapping)​

Step 4: Create VLANs​

Step 5: Configure Gigabit Uplink Ports (Dot1q-tunnel)​

Step 6: Configure 10G Uplink Ports (Dot1q-tunnel)​

Step 7: Configure GPON Ports with ONU Type Binding​

Step 8: Configure Management​

Understanding BDCOM Concepts​

ONU Type Matching Precedence​

Flow Mapping Entry Structure​

Tcont Types​

Verification​

Step 1: Check ONU Type Templates​

Step 2: Check GPON Profiles​

Step 3: Check ONU Registration​

Step 4: Check Port Configuration​

Step 5: Check VLAN Database​

Troubleshooting​

Advanced Configuration Options​

1. Bind Specific ONU by Serial Number​

2. Create Multi-Entry Flow Mapping (Multiple VLANs per UNI)​

3. Create Multiple Tcont Profiles (Different Bandwidth)​

4. Enable IGMP Snooping for IPTV​

5. Configure SNMP Traps​

6. Set LLDP (Link Layer Discovery Protocol)​

7. Enable Spanning Tree​

8. Create QoS Profile​

ONU Provisioning Example​

Complete ONU Setup (GPON0/1)​

MikroTik Integration​

Router Configuration for BDCOM VLANs​

Monitoring and Maintenance​

Daily Health Checks​

Backup Configuration​

Related Guides​