US 2011/0211579 A1 · METHOD, SYSTEM AND NETWORK NODE FOR SETTING UP A LABEL SWITCHING PATH

Abstract

The present invention relates to communications technologies and discloses a method, a system, and a label switching router for setting up a Label Switching Path (LSP). The method includes: an ingress edge node sends a label request packet to a downstream node, where the label request packet carries an Equal Cost Multi-Path (ECMP) property flag of a Forwarding Equivalence Class (FEC); the downstream node that receives the label request packet sends the label request packet to a next-hop node according to the property flag; and the node that receives the label request packet performs label mapping according to a path of the label request packet, binds a label to the FEC, and sets up an LSP. An ECMP property flag indicating setting up an ECMP route is permitted is introduced in the process of setting up an LSP. Therefore, setup of an ECMP route is prevented for the FEC that imposes special requirements, and management and maintenance of the network are facilitated.

Claims16

Dependent claims

A method for setting up a Label Switching Path (LSP), the method comprising:

sending, by an ingress edge node, a label request packet to a downstream node, wherein the label request packet carries an Equal Cost Multi-Path (ECMP) property flag of a Forwarding Equivalence Class (FEC);
sending, by the downstream node that receives the label request packet, the label request packet to a next-hop node according to the property flag;
and
performing, by the node that receives the label request packet, label mapping according to a path of the label request packet, distributing a label based on the FEC, and setting up an LSP.

1 more element

A method for setting up a Label Switching Path (LSP), the method comprising:

sending, by an egress edge node, a label mapping packet to an upstream node of the egress edge node, wherein the label mapping packet carries an Equal Cost Multi-Path (ECMP) property flag of a Forwarding Equivalence Class (FEC);
distributing, by the upstream node that receives the label mapping packet, a label based on the FEC according to the property flag, and sending the label mapping packet to a next-hop upstream node of the upstream node;
and
distributing, by an ingress edge node that receives the label mapping packet, a label based on the FEC, and setting up an LSP.

1 more element

Dependencies are inferred from the claim text.

Method, system and network node for setting up a label switching path

Life of this patent

Method, system and network node for setting up a label switching path

Life of this patent

Abstract

Claims16