Routing

How can I control the behavior of VPLS class-based forwarding with multiple label-switched paths (LSPs) when one LSP goes down?

By Elevate posted 02-04-2016 08:19

  

Question

How can I control the behavior of VPLS class-based forwarding with multiple label-switched paths (LSPs) when one LSP goes down?

Answer

The following configuration is an example in which class-based forwarding is applied to a VPLS. It works as expected when both RSVP LSPs are up. If one of the LSPs goes down, all traffic uses the remaining LSP.

 

For example, if the to-brg2-private LSP or tunnel goes down, all of the PRIVATE class traffic then uses the REALTIME tunnel.

 

next-hop-map NHOP-LSP-MAP {
forwarding-class REALTIME {
lsp-next-hop to-brg2-realtime;
}
forwarding-class PRIVATE {
lsp-next-hop to-brg2-private;
}
}

 

To change this behavior, apply a filter that only allows traffic of the specific forwarding class on each LSP:

 

set protocols mpls label-switched-path name policing filter name

 For more information, click Layer 2 VPNs and VPLS Feature Guide.


#Layer2VPNs
#vpls
#FAQ
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