Got it

MPLS BFD

Created: Dec 20, 2019 06:53:09Latest reply: Dec 20, 2019 07:12:21 293 1 0 0 0
  Rewarded HiCoins: 0 (problem resolved)

Hi all,

In the product manual, there are  2 very similar function/ command lines:

BFD for LDP LSP:

command line:

mpls bfd-trigger xxx

and 

BFD for LDP tunnel:

mpls bfd-trigger-tunnel xxx

Which should use? BFD for LDP LSP or BFD for LDP Tunnel? What's the difference?


Any ideas would be helpful. Thanks.

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Featured Answers
Popeye_Wang
Admin Created Dec 20, 2019 07:12:21

Hello Steelbule,

A tunnel can contain only one LSP or both the primary and backup LSPs. 

BFD for LSP is used to detect the connectivity of a single (primary) LSP and trigger LSP FRR. 

BFD for tunnel detects the connectivity of the primary and backup LSPs at the same time and triggers FRR (VPN FRR/BGP LSP FRR) of upper-layer services.


LDP Auto FRR depends on the IGP automatic rerouting function. After you run the frr (IS-IS) or frr (OSPF) command to enable IGP Auto FRR, LDP Auto FRR is automatically enabled.

Glad to help you! Any further questions, let us know.

Thanks!


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All Answers
Popeye_Wang
Popeye_Wang Admin Created Dec 20, 2019 07:12:21

Hello Steelbule,

A tunnel can contain only one LSP or both the primary and backup LSPs. 

BFD for LSP is used to detect the connectivity of a single (primary) LSP and trigger LSP FRR. 

BFD for tunnel detects the connectivity of the primary and backup LSPs at the same time and triggers FRR (VPN FRR/BGP LSP FRR) of upper-layer services.


LDP Auto FRR depends on the IGP automatic rerouting function. After you run the frr (IS-IS) or frr (OSPF) command to enable IGP Auto FRR, LDP Auto FRR is automatically enabled.

Glad to help you! Any further questions, let us know.

Thanks!


View more
  • x
  • convention:

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