1 DRNI Examples and DAS position Maarten Vissers 2011-08-10.

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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