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MPLS Fundamentals by Luc De Ghein - CCIE No. 1897

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Reducing the Number of LVCs

You can take the following actions to decrease the number of LVCs:

  • Reduce the number of IP prefixes

  • Use VC-Merge

  • Map CoS classes to LVCs

  • Disable head end VCs on an LSC

  • Block Label Request messages for IP prefixes

You can reduce the number of IP prefixes by using a loopback IP address for the IGP and LDP. Configure all links as IP unnumbered to the loopback interface IP address. Note that IP prefixes that are not configured on the ATM LSR but are still in the same routing domain cause LVCs to be set up. You can also reduce these IP prefixes by using unnumbered interfaces.

VC-Merge causes VCs to be merged at an ATM LSR. Without VC-Merge, one VC is set up per upstream neighbor and per destination. With VC-Merge, this is ...

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