3com S7906E Instruccion De Instalación

 

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The configuration tasks described in this section are about CSPF of MPLS TE. They must be used in 
conjunction with CSPF and the dynamic signal protocol (CR-LDP or RSVP-TE). Before performing 
them, be aware of each configuration objective and its impact on your system. 

Tuning CR-LSP setup involves these tasks: 

z

 

Configuring route pinning 

z

 

Configuring administrative group and affinity attribute 

z

 

Route pinning cannot be used together with reoptimization or automatic bandwidth adjustment. 

Follow these steps to configure route pinning: 

Enter system view 

–– 

Enter MPLS TE tunnel interface 
view 

 tunnel 

 

–– 

Enable route pinning 

Required 
Disabled by default 

Submit current tunnel 
configuration 

Required. 

 

The affinity attribute of an MPLS TE tunnel identifies the properties of the links that the tunnel can use. 
Together with the link administrative group, it decides which links the MPLS TE tunnel can use. This is 
done by ANDing the 32-bit affinity attribute with the 32-bit link administrative group attribute. When 
doing that, a 32-bit mask is used. The affinity bits corresponding to the 1s in the mask are “do care” bits 
which must be considered while those corresponding to the 0s in the mask are “don’t care” bits.  

For a link to be used by a TE tunnel, at least one considered affinity bit and its corresponding 
administrative group bit must be set to 1.  

Suppose the affinity of an MPLS TE tunnel is 0xFFFFFFFF and the mask is 0x0000FFFF. For a link to 
be used by the tunnel, the leftmost 16 bits of its administrative group attribute can be 0s or 1s, but at 
least one of the rest bits must be 1. 

The affinity of an MPLS TE tunnel is configured at the first node on the tunnel and then signaled to the 
rest nodes through RSVP-TE.  

 

The associations between administrative groups and affinities may vary by vendor.