Presentation on theme: "1 DRNI Examples and DAS position Maarten Vissers 2011-08-10."— Presentation transcript:
1 DRNI Examples and DAS position Maarten Vissers
2 PBN PBBN PB PBB-TENPBBN B-BEB 1 23 IB-BEB DRNI Three examples DRNI between a PBN and a PBBN is established between two PB nodes and two IB-BEB nodes DRNI between a PBBN and a PBB-TEN is established between four IB-BEB nodes DRNI between two PBBNs is established between four B-BEB nodes
3 The following slides present the three examples by means of their node models with Port and Relay functions Clause 6, 8 and 19 shims The objective is to determine where the Distributed Link Aggregation Sublayer (DAS) belongs in the stack of clause 6/8/19 shims 802.1AX specifies the LAG sublayer as a client of the MAC Sublayer; the LAG sublayer is bound by one upper MAC SAP and multiple lower MAC SAPs In an 802.1D bridge the LAG sublayer would be located below the MAC Relay, presenting the set of true ISS SAPs as one (virtual) ISS SAP to the Relay; the LAG sublayer is then bound by one upper (virtual) ISS SAP and multiple lower ISS SAPs Discussion: The upper ISS SAP can not be used to instantiate UP/DOWN MEPs and MIPs, as this SAP is a virtual SAP located inside the bridge’s ‘switch fabric’ In an 802.1Q bridge the LAG sublayer should in analogy be located below the MAC Relay, presenting the set of true EISS SAPs as one (virtual) EISS SAP to the Relay; the LAG sublayer is then bound by one upper (virtual) EISS SAP and multiple lower EISS SAPs Discussion: The upper EISS SAP can not be used to instantiate UP/DOWN MEPs and MIPs, as this SAP is a virtual SAP located inside the bridge’s ‘switch fabric’ Clause 22 of 802.1Q-2011 specifies that the LAG Sublayer is located at the ISS SAP, not at the EISS SAP; it specifies that per VID UP/DOWN MEPs and MIPs can be instantiated between MAC Relay and LAG Sublayer and that only a Link Down MEP can be instantiated below the LAG sublayer. DRNI however requires that each service instance passes through an UP MEP just before handing the service frames to the E-NNI link
4 PBN PBBN PB IB-BEB 1. PBN – DRNI – PBBN PNP S-VLAN Relay PNP S-VLAN Relay PNP PIP S-VLAN Relay PIP CNP B-VLAN Relay CBP PNP IB-BEB PIP S-VLAN Relay PIP CNP B-VLAN Relay CBP PNP DRNI ? ? 8.6 S-VLAN MAC Relay 19.2/3/ b n 19.2/3/ b n 19.2/3/ b n 19.2,19.3, b n 19.2/3/ b n 19.2/3/ b n 19.2/3/ b n 8.6 S-VLAN MAC Relay 19.2/3/ b /3/ b /3/ b DRNI , 9.5c 19.2/3/5 The Intra-DAS link can be supported by a link (solid line) in the carrier domain (top) or a dedicated link (dotted line) within the DRNI area (bottom) OR DAS Intra-DAS DAS Intra-DAS PNP CNP PNP PIP CBP 8.6 TESI/ESP MAC Relay
5 PBBN IB-BEB S-VLAN Relay B-VLAN Relay PNP IB-BEB S-VLAN Relay PIP B-VLAN Relay CBP PNP PBB-TEN IB-BEB 2. PBBN – DRNI – PBB-TEN CNP PIP S-VLAN Relay PIP CNP TESI/ESP B-Relay CBP PNP IB-BEB PIP S-VLAN Relay PIP CNP TESI/ESP B-Relay CBP PNP DRNI PIP CBP PIP CBP PIP CBP PIP CBP PIP CBP PIP CBP PIP CBP PNP ? ? 8.6 S-VLAN MAC Relay 19.2/3/ b n 19.2/3/ b n 19.2/3/ b n 19.2,19.3, b /3/ b n 19.2/3/ b n 19.2/3/ b n 8.6 S-VLAN MAC Relay 19.2/3/ b /3/ b /3/ b ,19.3, b ,19.3, b , 9.5c 19.2/3/5 DRNI , 9.5c 19.2/3/5 8.6 TESI/ESP MAC Relay 8.6 B-VLAN MAC Relay PIP CBP CNP PIP CBP OR 19.2,19.3, b n DAS Intra-DAS DAS Intra-DAS Should this be a P2P BSI carrying N S- VIDs? Or, should this be a P2P B-VLAN carrying N BSIs, each with a single S- VID?
6 PBBN B-BEB B-Relay PNP B-BEB B-Relay PNP PBBN B-BEB 3. PBBN – DRNI – PBBN CBP B-Relay PNP B-BEB CBP B-Relay PNP CBP DRNI ? ? 8.6 B-VLAN MAC Relay 19.2/3/ n 19.2/3/ n 19.2/3/ n 19.2,19.3, b n 19.2/3/ n 19.2/3/ n 19.2/3/ n 8.6 B-VLAN MAC Relay 19.2/3/ b /3/ b /3/ b n n n 6.11, 9.5c 19.2/3/5 6.11, 9.5c 19.2/3/5 19.2,19.3, b n 19.2,19.3, b n PNP CBP PNP CBP OR 6.11,9.5c (BSI Relay) 19.2/3/5 6.11,9.5c (BSI Relay) 19.2/3/5 DAS Intra-DAS DRNI DAS Intra-DAS Should this be a P2P B-VLAN? Multiple CBPs have to be combined to create one Super- CBP function (instead of multiple independent CBP functions) with a single set of B-VLAN MEPs connected to the Super-CBP function at one side and multiple CBP ports at the other side. BSI UP MEPs on each CBP port can be used to terminate the Carrier MA. Super-CBP function includes a BSI Relay function interconnecting B- VLAN virtual ports and CBP ports