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Why CSPF is required for Fast Failover (FRR, Link/Node Protection)??

01.09.12   |  
‎01-09-2012 09:38 PM

Hi Experts

 

Whey CSPF (Traffic Engineering Database) is required for MPLS Fast Failover in MPLS? Because as I believe it is required for MPLS traffic engineering (that is link colouring, bandwidth reservation etc).

 

Thanks for the reply

3 REPLIES
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Re: Why CSPF is required for Fast Failover (FRR, Link/Node Protection)??

01.15.12   |  
‎01-15-2012 02:28 AM

Hi Aeroplane,

 

The detour bypass lsp that is to be used in case of link failure should be adequate to accommodate all TE specs needed by the protected lsp.

 

BR

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Re: Why CSPF is required for Fast Failover (FRR, Link/Node Protection)??

01.17.12   |  
‎01-17-2012 09:25 AM

Hi

 

The detour (fast reroute) inherits the link colouring from the protected LSP although bypass LSP (link/node protection) does not. But you can manually specify the link colouring/bandwidth for the detour and bypass LSP. Since link colouring and bandwidth reversation etc requires the CSPF thats why FRR, Link/Node protection needs the CSPF.

 

HTH

Kashif Rana
JNCIE-SEC, JNCIE-ENT, JNCIE-SP, JNCIS(FWV,SSL),JNCIA(IDP,AC,WX),BIG IP-F5-LTM, CCNP
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Re: Why CSPF is required for Fast Failover (FRR, Link/Node Protection)??

01.17.12   |  
‎01-17-2012 12:43 PM

Thanks for both. How we can specify the contrainsts for detours?