【正文】 d agreement or Avaya policy. 18 Reverse Path Forwarding Check (RPFC) ? Loop suppression – SPB requires that the shortest path in each direction be the same between any two devices for both unicast and multicast paths – Logic of Reverse path Forwarding Check is to examine all frames received on a interface and make sure that the source address and ingress interface are correct. If not the frame gets dropped. MacB MacA BVLAN Forwarding Information Base (FIB) 2/11 MACA 2/12 MACB 2/11 2/12 MacA 2/11 2/12 MacB Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 19 SPB Hierarchical addressing – L2VSN 4/1 4/30 3/5 4/1 8600D BEB 00:bb:00:00:14:00 MLT 1 MLT 1 L2VSN ISID 20230 CVLAN 10 CVLAN 10 00:00:00:00:00:02 8600G BCB 00:bb:00:00:10:00 8600C BEB 00:bb:00:00:13:00 00:00:00:00:00:01 Backbone VLAN 4001 FDB (ISIS programmed) ======================================== 00:bb:00:00:10:00 ? port 4/30 00:bb:00:00:14:00 ? port 4/30 Backbone VLAN 4001 FDB (ISIS programmed) ======================================== 00:bb:00:00:13:00 ? port 3/5 00:bb:00:00:14:00 ? MLT 1 Customer VLAN 10 FDB(Mac learning as usual) =========================================== 00:00:00:00:00:01 ? port 4/1 00:00:00:00:00:02 ? BMAC 00:bb:00:00:14:00 Customer VLAN 10 FDB(Mac learning as usual) =========================================== 00:00:00:00:00:01 ? BMAC 00:bb:00:00:13:00 00:00:00:00:00:02 ? port 4/1 Backbone VLAN 1 : VID=4001 Backbone VLAN 2 : VID=4002 2nd BVLAN used for load sharing Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 20 SPB Hierarchical addressing – L3VSN 4/1 4/30 3/5 4/1 8600D BEB 00:bb:00:00:14:00 MLT 1 MLT 1 8600G BCB 00:bb:00:00:10:00 8600C BEB 00:bb:00:00:13:00 Backbone VLAN 4001 FDB (ISIS programmed) ======================================== 00:bb:00:00:10:00 ? port 4/30 00:bb:00:00:14:00 ? port 4/30 Backbone VLAN 4001 FDB (ISIS programmed) ======================================== 00:bb:00:00:13:00 ? port 3/5 00:bb:00:00:14:00 ? MLT 1 VRF instance IP routing table =========================================== ? vlan 101 (LOCAL/DIRECT) ? BMAC00:bb:00:00:14:00 (ISIS) VRF instance IP routing table =========================================== ? BMAC00:bb:00:00:13:00 (ISIS) ? vlan 102 (LOCAL/DIRECT) Backbone VLAN 1 : VID=4001 Backbone VLAN 2 : VID=4002 2nd BVLAN used for load sharing L3VSN ISID 30001 vlan 101 Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 21 L2VSN SPB Multicast trees ? 1 L2VSN – Terminated at 4 BEBs = 4 multicast trees / BVLAN = 8 multicast trees in 2 BVLANs ? Each multicast tree – unique to ISID + BEB to which it is rooted – unique multicast BMAC allocated: – consumes forwarding records in SPB nodes – only on SPB nodes which are on the multicast tree path Vlan 20 Vlan 20 Vlan 20 Vlan 20 L2 VSN ISID 1000 NICKNAME “3” ISID in Hex Only 1 (of 4) multicast tree shown Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 22 Shortest Path Bridging – L2 Service VSN Congruent unicast multicast paths Congruent forward reverse path Service Source Specific Multicast Tree Unicast Path ? Important Properties – All traffic types (known, unknown traffic, broadcast) use the same path – no out of order packets possible – Traffic A? B will follow the same path as B ? A – Multicast trees are ROOTed at source node within every service instance and only flood packets to ISID service node members – No MAC learning flooding in the Core – Fully QoS aware infrastructure Vlan 20 Vlan 20 Vlan 20 Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 23 ISIS ISIS ISIS ISIS ISIS ISIS ISIS ISIS ISIS ISIS ISIS 組播地址通過動態(tài) ISID 映射到專用 VSN上 a. 當(dāng)節(jié)點上有 Receive時，組播數(shù)據(jù)才會傳給該節(jié)點； b. ISIS 協(xié)議維護組播拓撲 .，整個網(wǎng)絡(luò)恢復(fù)時間小于 1秒 Multicast Sender Grp Join IGMP IGMP Join IGMP Join I ID 300 IPMC Receiver Receiver Receiver 重要特性： ? 邊緣節(jié)點啟用 IGMP ? VENA架構(gòu)為核心 ? 不再需要 PIM或者 DVMRP等復(fù)雜的協(xié)議 VENA – IP組播服務(wù) VSN Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 24 SPB QOS model DiffServ ? In the SPB model, all QOS within the SPB Fabric is based on the BackboneVLAN pbits ? Therefore it is essential that the desired QOS markings (IP DSCP or CustomerVLAN pbits) or QOS policies at the edge BEBs are translated in