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Feature Description - IP Services 01

NE05E and NE08E V300R003C10SPC500

This is NE05E and NE08E V300R003C10SPC500 Feature Description - IP Services
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Number of labels carried in an MPLS packet in various scenarios

Number of labels carried in an MPLS packet in various scenarios

MPLS VPN Scenario Number of Labels Description
Intra-AS VPN One private network label and N public network labels. Value of N (Depending on the Public-Network Tunnel Type):
  • N is 1 when packets are transmitted on an LDP LSP.
  • N is 1 when packets are transmitted on a static LSP.
  • N is 1 when packets are transmitted on a TE tunnel.
  • N is 2 when packets are transmitted on a TE tunnel in the LDP over TE scenario.
  • N is 3 when packets are transmitted on a TE fast reroute (FRR) bypass tunnel in the LDP over TE scenario.
NOTE:
The preceding Ns take effect when the PHP function is disabled. If PHP is enabled and performed, N minus 1 (N - 1) takes effect.
Inter-AS VPN Option A
  • A packet transmitted within an autonomous system (AS) carries one private network label and N public network labels.
  • A packet transmitted between ASs caries no labels.
Inter-AS VPN Option B
  • A packet transmitted within an AS carries one private network label and N public network labels.
  • A packet transmitted between ASs caries one private network label.
Inter-AS VPN Option C
  • A packet sent within an original AS carries one private network label, one Border Gateway Protocol (BGP) label, and N public network labels.
  • A packet transmitted from the original AS to another AS carries one private network label and one BGP label.
  • A packet is transmitted in non-original ASs, the packet carries one private network label and N public network labels.
HVPLS
  • A packet transmitted within the core layer carries an inner label and N public network labels.
  • A packet transmitted between a user-end provider edge (UPE) and a superstratum provider edge (SPE) carries one inner label.
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Updated: 2019-01-14

Document ID: EDOC1100058931

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