SR-Capabilities Sub-TLV and SR Local Block Sub-TLVĪdvertises a mapping between the prefix and SID.Īdvertises the label scope that an NE reserves for the local SID. IS-IS Multitopology IS Neighbor Attribute TLV-223Īdvertises SR-MPLS Adjacency SIDs on a LAN.Īdvertises the SR-MPLS SID or MPLS Label.IS-IS inter-AS reachability information TLV-141.IS-IS Multitopology IPv6 IP Reachability TLV-237Īdvertises SR-MPLS Adjacency SIDs on a P2P network.IS-IS Multitopology IPv4 Reachability TLV-235.IS-IS Extended IPv4 Reachability TLV-135.Table 1-2 IS-IS Sub-TLV extension for SID and NE SR-MPLS capabilities When an IP address is configured for a loopback interface, the IP address functions as the prefix SID that is a type of node SID. The node segment, a special prefix segment, identifies a specific node. The adjacency SID is a local SID out of the SRGB range. The adjacency segment is visible globally and takes effect locally.Īdjacency segment identified by the adjacency segment ID (SID). It can also be manually configured.Īn IGP floods the adjacency segment to the other NEs. The receive end uses the local SRGB to compute label values and generate forwarding entries.Īllocated by the ingress using a dynamic protocol. A prefix SID is an offset within the SRGB range and advertised by a source node. The prefix segment is identified by the prefix segment ID (SID). The prefix segment is visible globally and takes effect globally. Identifies the prefix of a destination address.Īn IGP floods the prefix segment to the other NEs.
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