MPLS TE Fast Reroute Path Node Protection

Lessons Discussion
1

This topic is to discuss the following lesson:

2

Hi Rene, thanks for sharing these examples for for FRR (link/node protection). I found them very useful! In both examples I see that you are manually creating the backup tunnels. That would be an enormous task in a large Service Provider Network which may have many alternative paths. it is quite common to have the backup tunnels created automatically. Its probably worth mentioning, or showing an example of how to create them automatically in IOS.

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Hello Douglas

Thanks for your useful suggestion! I will pass it on to Rene.

Thanks again!

Laz

4

Hi Rene,
thanks for the information. Quick question on this topic.
for the tunnel 2 creation as we are excluding the node P2 for the node protect FRR, why is the tunnel destination IP still P2 loopback 4.4.4.4.

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Hello Anudeep

Indeed you are correct. This seems to be a typo in the lesson. I will let Rene know to take a look and make the necessary modifications.

Thanks for pointing that out!

Laz

6

Hello @cdeepu702 ,

Which one do you mean? We have this:

P1(config)#ip explicit-path name EXCLUDE_P2
P1(cfg-ip-expl-path)# exclude-address 4.4.4.4
P1(config)#interface Tunnel2
P1(config-if)#ip unnumbered Loopback0
P1(config-if)#tunnel mode mpls traffic-eng
P1(config-if)#tunnel destination 6.6.6.6
P1(config-if)#tunnel mpls traffic-eng priority 7 7
P1(config-if)#tunnel mpls traffic-eng bandwidth 750
P1(config-if)#mpls traffic-eng path-option 1 explicit name EXCLUDE_P2

We exclude 4.4.4.4 (P2 loopback) and the tunnel 2 destination is 6.6.6.6 (P4).

Rene

7

My Bad I think I am confused with routers and their IP addresses.

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