Method for establishing a muticast LSP, system for transmitting multicast data
First Claim
1. A method for establishing a multicast Label Switched Path (LSP) in a Multi-Protocol Label Switching (MPLS) domain, comprising:
- learning and storing, by a Multicast Source Agent (MSA) node, multicast stream information, wherein the multicast stream information includes a mapping relationship between a multicast group and a multicast source, and/or the location of an ingress node in the MPLS domain, and wherein the MSA node starts a corresponding aging timer when the MSA node receives a new mapping relationship between the multicast source and the multicast group, and deletes the corresponding aging timer when the MSA node receives a notification about failure of the relationship between the multicast source and the multicast group;
receiving, by the MSA node, a query request message in the MPLS domain, and obtaining and sending corresponding multicast stream information to an egress edge node in the MPLS domain;
joining, by the egress edge node, the multicast group according to the obtained multicast stream information, and establishing a multicast LSP between the ingress edge node and the egress edge node.
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Abstract
The embodiment of the present invention discloses a method for establishing a multicast LSP and a system for transmitting multicast data. The method includes: a MSA node learns and stores multicast stream information; the egress edge node in the MPLS domain obtains the multicast stream information sent by the MSA node by sending a query request message to the MSA node; the egress edge node joins the multicast group, according to the obtained multicast stream information, and establishes a multicast LSP between the ingress edge node and the egress edge node. The technical solution of the present invention supports dynamic implementation of multicast services, and reduces the cost of maintaining a network topology.
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Citations
16 Claims
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1. A method for establishing a multicast Label Switched Path (LSP) in a Multi-Protocol Label Switching (MPLS) domain, comprising:
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learning and storing, by a Multicast Source Agent (MSA) node, multicast stream information, wherein the multicast stream information includes a mapping relationship between a multicast group and a multicast source, and/or the location of an ingress node in the MPLS domain, and wherein the MSA node starts a corresponding aging timer when the MSA node receives a new mapping relationship between the multicast source and the multicast group, and deletes the corresponding aging timer when the MSA node receives a notification about failure of the relationship between the multicast source and the multicast group; receiving, by the MSA node, a query request message in the MPLS domain, and obtaining and sending corresponding multicast stream information to an egress edge node in the MPLS domain; joining, by the egress edge node, the multicast group according to the obtained multicast stream information, and establishing a multicast LSP between the ingress edge node and the egress edge node. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A multicast data transmission system in a Multi-Protocol Label Switching (MPLS) domain, comprising an egress edge node, an ingress edge node, and a Multicast Source Agent (MSA) node, multicast, wherein
the MSA node learns and stores multicast stream information, wherein the multicast stream information includes a mapping relationship between a multicast group and a multicast source, and/or the location of the ingress node, starts a corresponding aging timer when the MSA node receives a new mapping relationship between the multicast source and the multicast group, deletes the corresponding aging timer when the MSA node receives a notification about failure of the relationship between the multicast source and the multicast group, receives a query request message sent in the MPLS domain, and obtains and sends the corresponding multicast stream information to the egress edge nod; the egress edge node joins the multicast group according to the obtained multicast stream information, and establishes a multicast Label Switched Path (LSP) between the ingress edge node and the egress edge node. - View Dependent Claims (8, 9, 10)
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11. A method for establishing a multicast Label Switched Path (LSP) in a Multi-Protocol Label Switching (MPLS) in an MPLS domain, comprising:
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notifying, by any one of nodes in the MPLS domain, a change of a static mapping relationship between a multicast source and a multicast group to a multicast source agent (MSA) node, or notifying, by an ingress edge node in the MPLS domain, a change of a dynamic mapping relationship between the multicast source and the multicast group to the MSA node; learning and storing, by the MSA node, multicast stream information, wherein the multicast stream information includes;
a mapping relationship between a multicast group and a multicast source, and/or the location of the ingress node, and wherein the ingress node is directly connected with the multicast source;receiving, by the MSA node, a query request message in the MPLS domain, and obtaining and sending corresponding multicast stream information to an egress edge node in the MPLS domain; joining, by the egress edge node, the multicast group according to the obtained multicast stream information, and establishing a multicast LSP between the ingress edge node and the egress edge node. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification