[j-nsp] RSVP-Signalled LSPs

[Leigh Porter]

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The LSP should be re-built unless RSVP has signaled that the path be
torn down.

Of course, a native IPv4 lookup would break if you do not have the
routes on all your routers so sending the traffic using native IPv4
lookups could be entirely pointless.

- --
Leigh


Dermot Williams wrote:
> Hello all,
> 
>  
> 
> I have a quick question about RSVP LSPs that one or more of you might be
> able to answer for me. According to the JNCIS study guide "when an
> established LSP experiences a failure and is torn down, the traffic that
> was transiting the LSP begins to be forwarded using native IPv4 lookups
> in the network."
> 
>  
> 
> It's unclear from this sentence whether or not the LSP will be rebuilt
> using an alternative path or if the router will forward packets using
> the IGP indefinitely (requiring a manual clear in order to get it
> rebuilt). Our experience is that the LSP will be rebuilt over an
> alternative path fairly quickly but to date we have only used them to
> carry Layer 2 VPNs so that may impact the behaviour.
> 
>  
> 
> Could anyone clarify this for me?
> 
>  
> 
> Dermot Williams
> 
>  
> 
> Senior Network Engineer
> 
> Irish Broadband Internet Services
> 
>  
> 
> Mobile:   +353 86 3887961
> 
> DDI:         +353 1 4818481
> 
>  
> 
> 
> 
> 
> 
> 
> 
> 
> Note:
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> Thank You. 
> 
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