Overview
Axivora Connect (AS204539) publishes customer-facing BGP communities for traffic engineering, propagation control, and telemetry. Communities can be combined safely by following the bitmask rules below.
Raw list: Download community list (plain text)
Action Bitmask
| Bit | Meaning | Notes |
|---|---|---|
| 0 | Do not announce to target | Disables propagation. |
| 1 | Prepend 1 time | Combine prepend bits to reach the desired count. |
| 2 | Prepend 2 times | |
| 4 | Prepend 4 times | |
| 8 | Prepend 8 times | Example: 1 + 2 + 8 = 11 prepends. |
The prepend flags (1/2/4/8) follow a binary mask. Sum them to express the total prepend count in a single community.
Scope Selectors
| Pattern | Scope | Description |
|---|---|---|
(204539, 807, 0) |
All backbone nodes | Apply to every Axivora edge/router. |
(204539, 807, 1) |
Single router | Apply only to the direct connect node. |
Wildcard: * in the third field represents any action bitmask.
Internal Route Handling Communities
| Community | Purpose |
|---|---|
(204539, 1, *) | Do not send to iBGP |
(204539, 2, *) | Do not send to eBGP |
(204539, 3, *) | Do not send to kernel |
(204539, 4, *) | Send to kernel but mark unreachable |
(204539, 5, *) | Send to kernel but mark blackhole |
(204539, 101, *) | Allow bgp_local_perf |
(204539, 201, *) | Transit routes |
(204539, 202, *) | IXP route-server routes |
(204539, 203, *) | Peer routes |
(204539, 204, *) | Customer routes |
(204539, 209, *) | iBGP routes |
Control Communities
| Community Pattern | Description |
|---|---|
(204539, 1*00, 0) | Apply action to everyone |
(204539, 1*01, <asn>) | Exclude the action for a specific ASN |
(204539, 1*02, <asn>) | Apply the action only to the specified ASN |
(204539, 1*10, 0) | Apply action to every region |
(204539, 1*11, <region>) | Exclude the action from a specific region |
(204539, 1*12, <region>) | Apply the action only to the specified region |
(204539, 1019, 0) | Reset regional filters (overrides (204539, 1010, 0)) |
(204539, 1*20, 0) | Apply action to every country |
(204539, 1*21, <country>) | Exclude the action from a specific country |
(204539, 1*22, <country>) | Apply the action only to the specified country |
(204539, 1*30, 1) | Target upstreams |
(204539, 1*30, 2) | Target IXP route servers |
(204539, 1*30, 3) | Target peers |
(204539, 1*30, 4) | Target downstreams |
(204539, 1*30, 8) | Target route collectors |
Wildcard: * in the third field represents any action bitmask.
Precedence: If both (204539, 1010, 0) and (204539, 1019, 0) are attached, the reset community wins and re-enables announcements globally.
Usage Examples
Prepend 11 times to AS13335:
(204539, 1102, 13335) # prepend 1 time to AS13335
(204539, 1202, 13335) # prepend 2 times to AS13335
(204539, 1802, 13335) # prepend 8 times to AS13335
=> 1 + 2 + 8 = 11 prepend times
Prepend 2 to everyone except AS13335:
(204539, 1200, 0) # prepend 2 to everyone
(204539, 1201, 13335) # exclude AS13335
Do not announce to anyone:
(204539, 1000, 0)
Announce to Europe only:
(204539, 1010, 0) # block all regions
(204539, 1011, 41) # re-allow region 41 (Europe, Amsterdam)Informational Communities
| Community | Meaning |
|---|---|
(204539, 10000, <region>) | Route received from region <region> |
(204539, 10001, <country>) | Route received from country <country> |
Region Codes
| Code | Region |
|---|---|
| 41 | Europe (Axivora – Amsterdam) |
| 42 | North America – East |
| 43 | North America – Central |
| 44 | North America – West |
| 45 | Central America |
| 46 | South America – Central |
| 47 | South America – West |
| 48 | Africa – North (above Sahara) |
| 49 | Africa – South (below Sahara) |
| 50 | Asia – South (IN, PK, BD) |
| 51 | Asia – South-East (TH, SG, PH, ID, MY) |
| 52 | Asia – East (JP, KR, TW, HK, CN) |
| 53 | Pacific & Oceania (AU, NZ, FJ) |
| 54 | Antarctica |
| 55 | Asia – North (RU) |
| 56 | Asia – West (IR, TR, UAE) |
| 57 | Central Asia (AF, UZ, KZ) |
Country Codes
Use ISO-3166 numeric-3 country codes when populating <country>. Other formats are not guaranteed to match.