# US 10,320,667 B2 · Notification method and device and acquisition device for MAC address of ESADI > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,320,667 B2 - Document ID: US10320667B2 - Status: Granted - Kind: B2 - Application number: 15/327,382 - Filed: 2014-10-24 - Published: 2017-08-24 - Granted: 2019-06-11 - Earliest claimed: 2014-07-24 - Assignees: Zte Corporation - Applicants: Zte Corporation - Inventors: Qiang Wu; Ting Liao - Web page: https://patentgrep.com/patent/US10320667B2 ## CPC - H04L 45/66: {Layer 2 routing, e.g. in Ethernet based MAN's} - H04L 45/02: Topology update or discovery - H04L 45/245: {Link aggregation, e.g. trunking} - H04L 2101/622: Layer-2 addresses, e.g. medium access control [MAC] addresses - Y02D 30/50: in wire-line communication networks, e.g. low power modes or reduced link rate - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract The present document discloses a notification method and device and an acquisition device for a MAC address of ESADI. The method includes: a RB issuing a MAC address which is reachable natively by the RB via a LSP of the ESADI; and Step 204: the RB notifying multiple RBs which correspond to the MAC address and belong to the same MC-LAG by way of a MAC-Reachability TLV extension of the LSP. The present document solves the problem in the related technology that the RB is unable to notify the remote RB of native multi-chassis RB IDs when accessing the TRILL network by a multi-chassis access, so that the remote RB can acquire which RBs belong to the same MC-LAG, thereby improving the flexibility of the processing manner. ## Claims ### Claim 1 An announcement method for a Media Access Control(MAC) address of End Station Address Distribution Information(ESADI)comprising: issuing, by a first Routing Bridge (RB), a MAC address which is reachable natively by the first RB via a Link State Protocol (LSP) of the ESADI to a network; and announcing, by the first RB, MAC addresses of other RBs and the MAC address of the first RB through a MAC-Reachability Type Length Value (TLV) extension of the LSP, wherein the first RB and other RBs belong to a same Multi-Chassis Link Aggregation Group (MC-LAG), wherein the MAC-Reachability TLV extension of the LSP comprises: Identities (IDs) of the other RBs which belong to the same MC-LAG as the first RB in one or more MAC ITEMs of a MAC-Reachability TLV of the LSP, and wherein the MAC ITEM is an extension of a MAC address field in the MAC-Reachability TLV, wherein, after issuing, by the first RB, the MAC address which is reachable natively by the first RB via the LSP of the ESADI to the network, the method further comprises: receiving, by a remote Routing Bridge (RB), a first MAC-Reachability TLV extension of Link State Protocol (LSP) from the first RB, receiving, by the remote RB, one or more second MAC-Reachability TLV extensions of LSP from the other RBs; determining, by the remote RB, that MAC addresses of the other RBs and a MAC address of the first RB have a relationship and belong to the same MC-LAG according to the first and second MAC-Reachability TLV extensions of the LSP, wherein the determining comprises: acquiring, by the remote RB, the IDs of the other RBs, wherein the IDs of the other RBs are carried in one or more MAC ITEMs of the first MAC-Reachability TLV extension of the LSP, respectively determining that an ID of the first RB is carried in a MAC ITEM of the second MAC-Reachability TLV extensions of the LSP, and combining the MAC addresses of the first RB and the other RBs which have the relationship as belonging to the same MC-LAG into one MAC address providing unit; calculating, by the remote RB, a confidence of the MAC address providing unit, wherein the confidence is used for participating in a MAC ITEM calculation of Transparent Interconnection of Lots of Links (TRILL) of the MAC addresses. ### Claim 2 (depends on 1) The method according to claim 1, wherein, the MAC ITEM contains a MAC address with six bytes, a total length of a sub-TLV and one or more sub-TLVs, wherein, the one or more sub-TLVs contain the sub-TLVs which are set to describe the IDs of the other RBs belonging to the same MC-LAG as the first RB. ### Claim 3 (depends on 2) The method according to claim 2, wherein, the sub-TLVs which are set to describe the IDs of the other RBs belonging to the same MC-LAG as the first RB are SYSTEM-ID sub-TLVs of the other RBs belonging to the same MC-LAG as the first RB, wherein the sub-TLVs contain the SYSTEM-IDs which denote the other RBs belonging to the same MC-LAG as the first RB in an ESADI Intermediate System to Intermediate System (ISIS). ### Claim 4 (depends on 3) The method according to claim 3, wherein, announcing, by the first RB, by way of the MAC-Reachability TLV extension of the LSP comprises: the extension and announcement is defined through a specified type, or is identified through setting a RESV field in the MAC-Reachability TLV. ### Claim 5 (depends on 2) The method according to claim 2, wherein, the sub-TLVs which are set to describe the IDs of the other RBs belonging to the same MC-LAG as the first RB are nickname sub-TLVs of the other RBs belonging to the same MC-LAG as the first RB, wherein the sub-TLVs contain the nicknames which denote the other RBs belonging to the same MC-LAG as the first RB in an ESADI ISIS. ### Claim 6 (depends on 2) The method according to claim 2, wherein, announcing, by the first RB, by way of the MAC-Reachability TLV extension of the LSP comprises: the extension and announcement is defined through a specified type, or is identified through setting a RESV field in the MAC-Reachability TLV. ### Claim 7 (depends on 1) The method according to claim 1, wherein, the IDs of the other RBs belonging to the same MC-LAG as the first RB comprise: SYSTEM-IDs of the other RBs; or nicknames of the other RBs. ### Claim 8 (depends on 7) The method according to claim 7, wherein, announcing, by the first RB, by way of the MAC-Reachability TLV extension of the LSP comprises: the extension and announcement is defined through a specified type, or is identified through setting a RESV field in the MAC-Reachability TLV. ### Claim 9 (depends on 1) The method according to claim 1, wherein, announcing, by the first RB, by way of the MAC-Reachability TLV extension of the LSP comprises: the extension and announcement is defined through a specified type, or is identified through setting a RESV field in the MAC-Reachability TLV. ### Claim 10 (depends on 1) The method according to claim 1, wherein, calculating, by the remote RB, the confidence of the MAC address providing unit comprises: calculating, by the remote RB, that the confidence of the MAC address providing unit is a confidence of a RB with the highest confidence in RBs belonging to the same MC-LAG, wherein the confidence of the MAC address providing unit is used for a selection or decision among multiple MAC address providing units in the MAC ITEM calculation of the TRILL. ### Claim 11 An announcement device for a Media Access Control (MAC) address of End Station Address Distribution Information (ESADI) which is in a first Routing Bridge (RB), comprising: an announcement circuit, arranged to issue a MAC address which is reachable natively by the first RB via a Link State Protocol (LSP) of the ESADI to a network, and announce MAC addresses of other RB and the MAC address of the first RB through a MAC-Reachability Type Length Value (TLV) extension of the LSP, wherein the first RB and other RBs belong to a same Multi-Chassis Link Aggregation Group (MC-LAG), wherein the MAC-Reachability TLV extension of the LSP comprises: Identities (IDs) of the other RBs which belong to the same MC-LAG as the first RB in one or more MAC ITEMs of a MAC-Reachability TLV of the LSP, and wherein the MAC ITEM is an extension of a MAC address field in the MAC-Reachability TLV, wherein a first MAC-Reachability TLV extension of LSP is received by a remote Routing Bridge (RB) from the first RB, one or more second MAC-Reachability TLV extensions of LSP are received by the remote RB from the other RBs, MAC addresses of the other RBs and a MAC address of the first RB are determined by the remote RB to have a relationship and belong to the same MC-LAG according to the first and second MAC-Reachability TLV extensions of the LSP, wherein MAC addresses of the other RBs and a MAC address of the first RB are determined by following steps: acquiring, by the remote RB, the IDs of the other RBs, wherein the IDs of the other RBs are carried in one or more MAC ITEMs of the first MAC-Reachability TLV extension of the LSP, respectively determining that an ID of the first RB is carried in a MAC ITEM of the second MAC-Reachability TLV extensions of the LSP, and combining the MAC addresses of the first RB and the other RBs which have the relationship as belonging to the same MC-LAG into one MAC address providing unit and a confidence of the MAC address providing unit is calculated by the remote RB, wherein the confidence is used for participating in a MAC ITEM calculation of Transparent Interconnection of Lots of Links (TRILL) of the MAC addresses.