Network Configuration Documentation

Overview

This document outlines the BGP routing configuration for our multi-homed network with connections to various internet exchanges and transit providers in Bangkok, Hong Kong, Singapore, and Europe. Currently 3x 10G fibers are used for uplinks.

Bandwidth

BGP Community Structure

We use BGP communities to classify and manage routes based on their origin and characteristics. Our community format is AABBCC, where:

AA: Region/Type
- 10: Local (Bangkok)
- 20: Regional
- 30: Remote
BB: Provider
- 10: BKNIX
- 20: AMS-IX
- 30: IPTX
- 40: Reserved for future use
CC: Connection Identifier
- 00: Primary connection
- 01-99: Additional connections, ordered by preference

Key Communities

101000: BKNIX Primary (Local 10G - Bangkok)
102000: AMS-IX Bangkok Primary (Local 1G - Bangkok)
201000: AMS-IX Hong Kong Primary (Regional 200M - Hong Kong)
203000: IPTX Singapore Primary (Regional 500M - Singapore)
203001: IPTX Hong Kong Secondary (Regional 500M - Hong Kong)
302000: AMS-IX Europe Primary (Remote 100M - Amsterdam)

Network Topology Diagram

graph TD
    BKK50((BKK50 Gateway Router<br>CCR2004-16G-2S+<br>ECMP with 10G connections))
    BKK50 --> |10G| BKK20
    BKK50 --> |10G| BKK10

    subgraph BKK20[BKK20 Edge Router<br>CCR2216-1G-12XS-2XQ]
        B20_AMSIX[AMSIX-LAG<br>10G Physical Port]
    end

    subgraph BKK10[BKK10 Edge Router<br>CCR2116-12G-4S+]
        B10_AMSIX[AMSIX-LAG<br>10G Physical Port]
        B10_BKNIX[BKNIX-LAG<br>10G Physical Port]
    end

    B20_AMSIX --> |VLAN 911<br>1G| AMS_IX_BKK[AMS-IX Bangkok]
    B20_AMSIX --> |VLAN 3994<br>200M| AMS_IX_HK[AMS-IX Hong Kong]
    B20_AMSIX ==> |VLAN 2520<br>500M<br>Active| IPTX_SG[IPTX Singapore]
    B20_AMSIX -.-> |VLAN 2517<br>500M<br>Passive| IPTX_HK[IPTX Hong Kong]

    B10_AMSIX ==> |VLAN 2519<br>500M<br>Active| IPTX_HK
    B10_AMSIX -.-> |VLAN 2518<br>500M<br>Passive| IPTX_SG
    B10_AMSIX --> |VLAN 3995<br>100M| AMS_IX_EU[AMS-IX Europe]
    B10_BKNIX --> |10G| BKNIX[BKNIX]

    AMS_IX_BKK --> INTERNET((Internet))
    AMS_IX_HK --> INTERNET
    AMS_IX_EU --> INTERNET
    IPTX_SG --> INTERNET
    IPTX_HK --> INTERNET
    BKNIX --> INTERNET

    classDef router fill:#1a5f7a,color:#ffffff,stroke:#333,stroke-width:2px;
    classDef ix fill:#4d3e3e,color:#ffffff,stroke:#333,stroke-width:2px;
    classDef internet fill:#0077be,color:#ffffff,stroke:#333,stroke-width:2px;
    classDef active stroke:#00ff00,stroke-width:4px;
    classDef passive stroke:#ff0000,stroke-dasharray: 5 5;

    class BKK50,INTERNET internet;
    class BKK20,BKK10 router;
    class AMS_IX_BKK,AMS_IX_HK,AMS_IX_EU,IPTX_SG,IPTX_HK,BKNIX ix;

    linkStyle default stroke:#ffffff,stroke-width:2px;

Routing Configuration

Name	Speed	Path Prepend	MED	Local Pref	Community	Description	Edge Router
BKNIX	10G	0	50	200	142108:101000	LOCAL-BKNIX-PRIMARY	BKK10
AMS-IX Bangkok	1G	0	100	190	142108:102000	LOCAL-AMSIX-PRIMARY	BKK20
IPTX Singapore	500M	1	150	185	142108:203000	REGIONAL-IPTX-SG-PRI	BKK20
IPTX Hong Kong	500M	1	150	180	142108:203001	REGIONAL-IPTX-HK-SEC	BKK10
AMS-IX Hong Kong	200M	2	200	170	142108:201000	REGIONAL-AMSIX-HK-PRI	BKK10
AMS-IX Europe	100M	3	300	160	142108:302000	REMOTE-AMSIX-EU-PRI	BKK20

Traffic Engineering Principles

Local Preference: Higher values indicate more preferred routes. Local routes are preferred over regional, which are preferred over remote routes.
MED (Multi-Exit Discriminator): Lower values are preferred. Used to influence inbound traffic when other attributes are equal.
AS Path Prepending: Increases AS path length to make a route less preferred. Used for coarse control of inbound traffic.

Rotko Networks infrastructure