FRR BGP协议分析7 -- BGP 层3隧道 (1)

秒速五厘米 2023-06-17 05:55 213阅读 0赞

# 本文，我们分析BGP 和层3隧道 相关的命令处理 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FybWxpbnV4d3c_size_16_color_FFFFFF_t_70][]

这些命令的原理这里不再介绍

# label export auto #

配置label export auto 后，执行如下的命令

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命令会给每个VRF 分配一个标签，然后下发到MPLS 的LFIB表里面，涉及MPLS表项下发到内核的流程，先大概给个流程，后续再补充。

vpn\_leak\_postchange

vpn\_leak\_zebra\_vrf\_label\_update

zclient\_send\_vrf\_label

**zebra** **处理**

zread\_vrf\_label

mpls\_lsp\_install

后续处理的逻辑和LDP 一样

# rd export #

命令执行函数是：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FybWxpbnV4d3c_size_16_color_FFFFFF_t_70 2][]

后续继续补充

## 20.3 Export/import vpn ##

命令执行函数是：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FybWxpbnV4d3c_size_16_color_FFFFFF_t_70 3][]

后续继续补充

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