Signaling of attachment circuit status and automatic discovery of inter-chassis communication peers
First Claim
1. A method performed at a routing device, the method comprising:
- identifying a first system identifier associated with a multi-homed routing device linked to the routing device, the first system identifier identifying a redundancy group to provide redundant links for the multi-homed device;
receiving a second system identifier from a remote routing device by way of a routing protocol in a domain that includes the routing device and the remote routing device;
comparing the first system identifier with the second system identifier;
establishing an inter-chassis control plane channel session with the remote routing device based on a match of the first system identifier with the second system identifier, the match indicating that the routing device and the remote routing device are each linked to the multi-homed routing device and that the routing device and the remote routing device are both part of the redundancy group;
synchronizing with the remote routing device by way of the inter-chassis control plane channel session to identify a state of a link from the routing device to the multi-homed routing device; and
advertising the state of the link by way of the routing protocol in the domain that includes the routing device and the remote routing device.
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Abstract
In an embodiment, a method of signaling status at a routing device is provided. In this method, the routing device establishes an inter-chassis control plane channel session with a remote routing device. Here, the routing device and the remote routing device are linked to a multi-homed routing device. The routing device then synchronizes with the remote routing device by way of the inter-chassis control plane channel session to identify a state of a link from the routing device to the multi-homed routing device. The state of the link is thereafter advertised by way of Border Gateway Protocol (BGP). Additionally, a method of discovering inter-chassis communication peers via BGP between the first and remote routing devices is provided.
9 Citations
20 Claims
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1. A method performed at a routing device, the method comprising:
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identifying a first system identifier associated with a multi-homed routing device linked to the routing device, the first system identifier identifying a redundancy group to provide redundant links for the multi-homed device; receiving a second system identifier from a remote routing device by way of a routing protocol in a domain that includes the routing device and the remote routing device; comparing the first system identifier with the second system identifier; establishing an inter-chassis control plane channel session with the remote routing device based on a match of the first system identifier with the second system identifier, the match indicating that the routing device and the remote routing device are each linked to the multi-homed routing device and that the routing device and the remote routing device are both part of the redundancy group; synchronizing with the remote routing device by way of the inter-chassis control plane channel session to identify a state of a link from the routing device to the multi-homed routing device; and advertising the state of the link by way of the routing protocol in the domain that includes the routing device and the remote routing device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-transitory machine-readable medium that stores instructions, which, when performed by a routing device, cause the routing device to perform operations comprising:
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identifying a first system identifier associated with a multi-homed routing device linked to the routing device, the first system identifier identifying a redundancy group to provide redundant links for the multi-homed device; receiving a second system identifier from a remote routing device by way of a routing protocol in a domain that includes the routing device and the remote routing device; comparing the first system identifier with the second system identifier; establishing an inter-chassis control plane channel session with the remote routing device based on a match of the first system identifier with the second system identifier, the match indicating that the routing device and the remote routing device are each linked to the multi-homed routing device and that the routing device and the remote routing device are both part of the redundancy group; synchronizing with the remote routing device by way of the inter-chassis control plane channel session to identify a state of a link from the routing device to the multi-homed routing device; and advertising the state of the link by way of the routing protocol in the domain that includes the routing device and the remote routing device. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. An apparatus comprising:
at least one computer configured to perform operations for a routing device including; identifying a first system identifier associated with a multi-homed routing device linked to the routing device, the first system identifier identifying a redundancy group to provide redundant links for the multi-homed device; receiving a second system identifier from a remote routing device by way of a routing protocol in a domain that includes the routing device and the remote routing device; comparing the first system identifier with the second system identifier; establishing an inter-chassis control plane channel session with the remote routing device based on a match of the first system identifier with the second system identifier, the match indicating that the routing device and the remote routing device are each linked to the multi-homed routing device and that the routing device and the remote routing device are both part of the redundancy group; synchronizing with the remote routing device by way of the inter-chassis control plane channel session to identify a state of a link from the routing device to the multi-homed routing device; and advertising the state of the link by way of the routing protocol in the domain that includes the routing device and the remote routing device. - View Dependent Claims (17, 18, 19, 20)
Specification