Other uses IS-IS is also used as the control plane for IEEE 802.1aq Shortest Path Bridging (SPB). SPB allows for shortest-path forwarding in an Ethernet mesh network context utilizing multiple equal cost paths. This permits SPB to support large Layer 2 topologies, with fast convergence, and improved use of the mesh topology. Combined with this is single point provisioning for logical connectivity membership. IS-IS is therefore augmented with a small number of TLVs and sub-TLVs, and supports two Ethernet encapsulating data paths, 802.1ad Provider Bridges and 802.1ah Provider Backbone Bridges. SPB requires no state machine or other substantive changes to IS-IS, and simply requires a new Network Layer Protocol Identifier (NLPID) and set of TLVs. This extension to IS-IS is defined in the IETF proposed standard RFC 6329.
other uses is-is is also used as the control plane for ieee 8021aq shortest path bridging (spb) spb allows for shortest-path forwarding in an ethernet mesh network context utilizing multiple equal cost paths this permits spb to support la.rge layer 2 topologies with fast convergence and improved use of the mesh topology combined with this is single point provisioning for logical connectivity membership is-is is therefore au?gmented with a small number of tlvs and sub-tlvs and supports two ethernet encapsulating data paths 8021ad provider bridges and 8021ah provider backbone bridges spb requires no state machine or other substantive changes to is-is and simply requires a new network layer protocol identifier (nlpid) and set of tlvs this extension to is-is is defined in the ietf proposed standard rfc 6329