# Axivora Connect Ltd · AS204539 BGP Communities

All communities below are customer-facing and can be combined as needed.

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## Action Bitmask

| Bit | Meaning | Notes |
| --- | ------- | ----- |
| 0   | Do not announce to target | Also used as "disable" action. |
| 1   | Prepend 1 time | |
| 2   | Prepend 2 times | |
| 4   | Prepend 4 times | |
| 8   | Prepend 8 times | |

> **Bitmask primer:** The prepend flags (1/2/4/8) follow a binary mask. Sum the values to produce the total prepend count (e.g. 1 + 2 + 8 = 11 prepends).

---

## 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. |

---

## 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 |

---
`*` in the third field represents "any action bitmask" as defined above.

## 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)` blocks) |
| `(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 |

`*` in the second field represents "any action bitmask" as defined above.

> **Precedence:** If both `(204539, 1010, 0)` ("block all regions") and `(204539, 1019, 0)` ("reset regional filters") are present, `(204539, 1019, 0)` wins and re-enables announcements globally.

---

## Usage Examples

```text
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 from that action

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 (Axivora Datacenters)

| 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 - Southeast (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 codes for country-based selectors. Other formats are not guaranteed to match.

---

## 社区参考 (中文) 

下列社区均供客户使用，可按需求组合。

### 动作位掩码

| 位 | 含义 | 说明 |
| --- | --- | --- |
| 0 | 不向目标发布 | 用于禁止传播。 |
| 1 | AS Path 前置 1 次 |  |
| 2 | AS Path 前置 2 次 |  |
| 4 | AS Path 前置 4 次 |  |
| 8 | AS Path 前置 8 次 | 1 + 2 + 8 = 11 次前置。 |

> 前置位 (1/2/4/8) 遵循二进制叠加，可组合成任意前置次数。

### 作用范围选择

| 模式 | 范围 | 描述 |
| --- | --- | --- |
| `(204539, 807, 0)` | 所有骨干节点 | 作用于所有 Axivora 边界/骨干路由。 |
| `(204539, 807, 1)` | 当前节点 | 仅作用于直接连接的节点。 |

`*` 表示第三个字段可填写任意动作位掩码。

### 内部路由处理社区

| Community | 用途 |
| --- | --- |
| `(204539, 1, *)` | 不向 iBGP 发布 |
| `(204539, 2, *)` | 不向 eBGP 发布 |
| `(204539, 3, *)` | 不写入内核路由 |
| `(204539, 4, *)` | 写入内核但标记不可达 |
| `(204539, 5, *)` | 写入内核但标记黑洞 |
| `(204539, 101, *)` | 允许 `bgp_local_perf` |
| `(204539, 201, *)` | Transit 路由 |
| `(204539, 202, *)` | IXP Route Server 路由 |
| `(204539, 203, *)` | 对等体路由 |
| `(204539, 204, *)` | 客户路由 |
| `(204539, 209, *)` | iBGP 路由 |

### 控制社区

| Community 模式 | 说明 |
| --- | --- |
| `(204539, 1*00, 0)` | 对所有对象执行动作 |
| `(204539, 1*01, <asn>)` | 对指定 ASN 停止动作 |
| `(204539, 1*02, <asn>)` | 仅对指定 ASN 执行动作 |
| `(204539, 1*10, 0)` | 对所有区域执行动作 |
| `(204539, 1*11, <region>)` | 对指定区域停止动作 |
| `(204539, 1*12, <region>)` | 仅对指定区域执行动作 |
| `(204539, 1019, 0)` | 重置区域过滤 (覆盖 `(204539, 1010, 0)`)  |
| `(204539, 1*20, 0)` | 对所有国家执行动作 |
| `(204539, 1*21, <country>)` | 对指定国家停止动作 |
| `(204539, 1*22, <country>)` | 仅对指定国家执行动作 |
| `(204539, 1*30, 1)` | 作用于上游 |
| `(204539, 1*30, 2)` | 作用于 IXP Route Server |
| `(204539, 1*30, 3)` | 作用于对等体 |
| `(204539, 1*30, 4)` | 作用于下游 |
| `(204539, 1*30, 8)` | 作用于路由采集器 |

`*` 表示第二个字段使用任意动作位掩码 (0、1、2、4、8 及其组合) 

### 使用示例

```
为 AS13335 前置 11 次：
  (204539, 1102, 13335)  # 前置 1 次
  (204539, 1202, 13335)  # 前置 2 次
  (204539, 1802, 13335)  # 前置 8 次
  => 1 + 2 + 8 = 11 次

除 AS13335 外全部前置 2 次：
  (204539, 1200, 0)      # 对所有对象前置 2 次
  (204539, 1201, 13335)  # 排除 AS13335

不向任何对象发布：
  (204539, 1000, 0)

仅向欧洲区域发布：
  (204539, 1010, 0)  # 阻止所有区域
  (204539, 1011, 41) # 重新允许 41 区域 (欧洲，阿姆斯特丹) 
```

### 信息类社区

| Community | 含义 |
| --- | --- |
| `(204539, 10000, <region>)` | 路由来源于指定区域 |
| `(204539, 10001, <country>)` | 路由来源于指定国家 |

### 区域代码

| 代码 | 区域 |
| --- | --- |
| 41 | 欧洲 (Axivora - 阿姆斯特丹)  |
| 42 | 北美东部 |
| 43 | 北美中部 |
| 44 | 北美西部 |
| 45 | 中美洲 |
| 46 | 南美中部 |
| 47 | 南美西部 |
| 48 | 非洲北部 (撒哈拉以北)  |
| 49 | 非洲南部 (撒哈拉以南)  |
| 50 | 亚洲南部 (印度、巴基斯坦、孟加拉)  |
| 51 | 亚洲东南部 (泰国、新加坡、菲律宾、印度尼西亚、马来西亚)  |
| 52 | 亚洲东部 (日本、韩国、台湾、香港、中国)  |
| 53 | 太平洋及大洋洲 (澳大利亚、新西兰、斐济)  |
| 54 | 南极洲 |
| 55 | 亚洲北部 (俄罗斯)  |
| 56 | 亚洲西部 (伊朗、土耳其、阿联酋)  |
| 57 | 中亚 (阿富汗、乌兹别克斯坦、哈萨克斯坦)  |

### 国家代码

请使用 ISO-3166 数字三位国家代码，其他格式不保证识别。