Abstract: This disclosure describes techniques relating to assigning unique segment identifiers (SIDs) in a segment routing network. In one example, this disclosure describes a method that includes receiving, by a computing system and from a node on a network, a request to allocate a segment identifier for use in a segment routing network; allocating, by the computing system and from a block of addresses, an assigned segment identifier; responding to the request by outputting, by the computing system and over the network to the node, information about the assigned segment identifier; and maintaining the assigned segment identifier.

Abstract: This disclosure describes techniques that include determining, at an egress node in an SRm6 network, how to process a packet that may arrive without a segment routing header and/or a compressed routing header. In one example, this disclosure describes a method that includes receiving, by an egress node of a segment routing network, segment routing advertisements; configuring, by the egress node and based on the segment routing advertisements, information enabling the egress node to recognize encapsulated packets arriving at the egress node without a compressed routing header; receiving, by the egress node, a packet that does not have a compressed routing header; and de-encapsulating, by the egress node and based on the stored information, the packet.

Abstract: This disclosure describes techniques for using Operations, Administration, and Management (OAM) operations when routing packets using micro SIDs in segment routing. For example, a network device comprises one or more processors configured to: receive a packet; determine whether the packet is encapsulated with one or more micro segment identifiers (SIDs); in response to a determination that the packet is not encapsulated with one or more micro SIDs, determine whether the packet has reached a segment routing tunnel endpoint; and in response to a determination that the packet has reached the segment routing tunnel endpoint, initiate Operations, Administration, and Maintenance (OAM).

Abstract: This disclosure describes techniques that include determining, at an egress node in an SRm6 network, how to process a packet that may arrive without a segment routing header and/or a compressed routing header. In one example, this disclosure describes a method that includes receiving, by an egress node of a segment routing network, segment routing advertisements; configuring, by the egress node and based on the segment routing advertisements, information enabling the egress node to recognize encapsulated packets arriving at the egress node without a compressed routing header; receiving, by the egress node, a packet that does not have a compressed routing header; and de-encapsulating, by the egress node and based on the stored information, the packet.

Abstract: This disclosure describes techniques relating to assigning unique segment identifiers (SIDs) in a segment routing network. In one example, this disclosure describes a method that includes receiving, by a computing system and from a node on a network, a request to allocate a segment identifier for use in a segment routing network; allocating, by the computing system and from a block of addresses, an assigned segment identifier; responding to the request by outputting, by the computing system and over the network to the node, information about the assigned segment identifier; and maintaining the assigned segment identifier.

Abstract: An extend ping protocol is described that allow connectivity tests to be performed for individual network interfaces of a target device without requiring network reachability between the testing device and the remote interface whose status is being queried. Moreover, the extend ping protocol supports a plurality of different probe types that allow an administrator to control how identification information within an extended ping echo request is resolved to the unreachable interfaces.

Abstract: An extend ping protocol is described that allow connectivity tests to be performed for individual network interfaces of a target device without requiring network reachability between the testing device and the remote interface whose status is being queried. Moreover, the extend ping protocol supports a plurality of different probe types that allow an administrator to control how identification information within an extended ping echo request is resolved to the unreachable interfaces.

Abstract: A security access management system for a packet switched data communications network has access management apparatus operatively associated with the packet switches at each entry point of the network. The access management apparatus includes an administrative host processor for examining user terminal authorization information in packets received at the associated packet switch for transmission through the network to destination addresses for the packets. A database associated with the administrative host stores information including levels of authorization of the user terminals for the respective entry point of the network for access to specified destinations, as pre-assigned by the network customer.