NG-VPLS E-tree signaling using segment routing
A node in a Segment Routing network includes a plurality of ports and a switching fabric between the plurality of ports, wherein, for an Ethernet Tree (E-tree) service, a port is configured to transmit a packet with a plurality of Segment Identifiers (SID) including a first SID, a second SID, and a third SID, wherein the first SID identifies one of multicast, ingress replication for broadcast, and a destination node including any of a node SID and an anycast SID, wherein the second SID identifies a service including the E-tree service, and wherein the third SID identifies a source of the packet. A second port of the node is connected to a customer edge, and wherein the third SID is based on whether the customer edge is a leaf node or a root node in the E-tree service.
1. A node in a Segment Routing network comprising:
a plurality of ports and a switching fabric between the plurality of ports,
wherein, for an Ethernet Tree (E-tree) service, a first port is configured to
transmit a packet with a plurality of Segment Identifiers (SID) including a first SID, a second SID, and a third SID,
wherein the first SID identifies one of multicast, ingress replication for broadcast, and a destination node including any of a node SID and an anycast SID
wherein the second SID identifies a service including the E-tree service, and
wherein the third SID identifies a source of the packet,
wherein the second port is connected to a leaf node in the E-tree, and wherein the third SID includes a SID for the leaf node.
2. The node of claim 1 , wherein other nodes in the Segment Routing network connected to leaf nodes in the E-tree learn the leaf node via the leaf node SID and prevent forwarding thereto.
3. The node of claim 1 , wherein one or more nodes in the Segment Routing network connected to root nodes in the E-tree learn the leaf node via the leaf node SID for forwarding thereto.
4. The node of claim 1 , wherein the first port is configured to
signal a service SID for the E-tree service.
5. The node of claim 1 , wherein the second port of the node is connected to a customer edge node, and wherein the third SID is based on whether the customer edge is a leaf node or a root node in the E-tree service.
6. The node of claim 1 , wherein the second port is connected to a customer edge node that is multi-homed to the node and a second node, and wherein the third SID is an anycast SID.
7. The node of claim 1 , wherein the first port is configured to
withdraw an anycast SID responsive to a link failure.
8. The node of claim 1 , wherein the first port is configured to
flood Address Resolution Protocol (ARP) reply messages for other nodes in the Segment Routing network to use in ARP suppression.
9. A node in a Segment Routing network comprising:
a plurality of ports and a switching fabric between the plurality of ports,
wherein, for an Ethernet Tree (E-tree) service, a first port is configured to
transmit a packet with a plurality of Segment Identifiers (SID) including a first SID, a second SID, and a third SID,
wherein the first SID identifies one of multicast, ingress replication for broadcast, and a destination node including any of a node SID and an anycast SID,
wherein the second SID identifies a service including the E-tree service, and
wherein the third SID identifies a source of the packet,
wherein a second port of the node is connected to a customer edge node, and wherein the third SID is based on whether the customer edge node is a leaf node or a root node in the E-tree service.
10. The node of claim 1 , wherein a second port is connected to a leaf node in the E-tree, and wherein the third SID includes a SID for the leaf node.
11. The node of claim 1 , wherein the first port is configured to signal a service SID for the E-tree service.
12. The node of claim 1 , wherein the first port is configured to withdraw an anycast SID responsive to a link failure.
13. The node of claim 1 , wherein the first port is configured to flood Address Resolution Protocol (ARP) reply messages for other nodes in the Segment Routing network to use in ARP suppression.
14. A node in a Segment Routing network comprising:
a plurality of ports and a switching fabric between the plurality of ports,
wherein, for an Ethernet Tree (E-tree) service, a first port is configured to
transmit a packet with a plurality of Segment Identifiers (SID) including a first SID, a second SID, and a third SID,
wherein the first SID identifies one of multicast, ingress replication for broadcast, and a destination node including any of a node SID and an anycast SID,
wherein the second SID identifies a service including the E-tree service, and
wherein the third SID identifies a source of the packet,
wherein a second port is connected to a customer edge node that is multi-homed to the node and a second node, and wherein the third SID is an anycast SID.
15. The node of claim 1 , wherein a second port is connected to a leaf node in the E-tree, and wherein the third SID includes a SID for the leaf node.
16. The node of claim 1 , wherein the first port is configured to signal a service SID for the E-tree service.
17. The node of claim 1 , wherein the first port is configured to withdraw an anycast SID responsive to a link failure.
18. The node of claim 1 , wherein the first port is configured to
flood Address Resolution Protocol (ARP) reply messages for other nodes in the Segment Routing network to use in ARP suppression.