MPLS解決BGP路由黑洞

如拓撲圖中所示：
R1在AS100中，R2,R3,R4,R6在AS200中，R5在AS300中。R2的G0/0/1口和R3的G0/0/0和G0/0/1口，R4的G0/0/0口運行mpls ldp協議。R1上環回1.0.0.1/32和R5上的環回5.0.0.5/32宣告進BGP中。

抓取R2的G0/0/1的流量

查看標籤轉發列表
[R2]display mpls lsp

             LSP Information: LDP LSP

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FEC In/Out Label In/Out IF Vrf Name
3.0.0.3/32 NULL/3 -/GE0/0/1
3.0.0.3/32 1024/3 -/GE0/0/1
4.0.0.4/32 NULL/1024 -/GE0/0/1
4.0.0.4/32 1025/1024 -/GE0/0/1
2.0.0.2/32 3/NULL -/-

[R3]display mpls lsp

             LSP Information: LDP LSP

---

FEC In/Out Label In/Out IF Vrf Name
4.0.0.4/32 NULL/3 -/GE0/0/1
4.0.0.4/32 1024/3 -/GE0/0/1
3.0.0.3/32 3/NULL -/-
2.0.0.2/32 NULL/3 -/GE0/0/0
2.0.0.2/32 1025/3 -/GE0/0/0
[R3]
[R4]display mpls lsp

             LSP Information: LDP LSP

---

FEC In/Out Label In/Out IF Vrf Name
4.0.0.4/32 3/NULL -/-
3.0.0.3/32 NULL/3 -/GE0/0/1
3.0.0.3/32 1024/3 -/GE0/0/1
2.0.0.2/32 NULL/1025 -/GE0/0/1
2.0.0.2/32 1025/1025 -/GE0/0/1