【正文】 achability ISIS adjacencies SubTLV 29: Link Metric for SPBM alone 129 Protocol Supported SPBM 135 TE IP Reachability IP Reachability for IP shortcuts in GRT 143 SPBM Instance BVIDs SubTLV 6: BVIDs to ECT algorithm Used in ISIS Hellos only 144 SPBM Instance, Nickname, BVLANs ISIDs SubTLV 1: SPBM Instance Nickname SubTLV 3: BVLANs L2VSN ISIDs 184 SPBM IPVPN Reachability IP Reachability for L3 VSNs Preexisting ISIS TLVs New SPB TLVs Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 14 SPB ISIS LSDB Detail 8610:5 show isis lsdb lspid detail ================================================================================ ISIS LSDB (DETAIL) ================================================================================ Level1 LspID: SeqNum: 0x0000024b Lifetime: 589 Chksum: 0x674a PDU Length: 150 Host_name: 8620 Attributes: ISType 1 TLV:1 Area Addresses: 1 TLV:3 End System Neighbors: Metric: 0 00beb0000020 (8620) TLV:22 Extended IS reachability: Adjacencies: 2 TE Neighbors: 2 (8630) Metric:10 SPBM Sub TLV: port id: 193 num_port 1 SPB Metric: 10 (8610) Metric:10 SPBM Sub TLV: port id: 129 num_port 1 SPB Metric: 10 TLV:129 Protocol Supported: SPBM TLV:135 TE IP Reachability: 2 Metric: 1 Prefix Length: 32 UP/Down Bit: FALSE IP Address: TLV:144 SUBTLV 1 SPBM INSTANCE: Instance: 0 bridge_pri: 0 OUI: 000020 num of trees: 2 vid tuple : ubit 1 mbit 1 ectalg 0x80c201 base vid 4001 vid tuple : ubit 1 mbit 1 ectalg 0x80c202 base vid 4002 TLV:144 SUBTLV 3 ISID: Instance: 0 Metric: 0 BMAC: 00beb1000010 BVID:10 Number of ISID39。s:2 10(Both),11(Both) TLV:184 SPBM IPVPN Reachability: Vrf ISID:31112 Metric:1 Prefix Length:32 IP Address: Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 15 Understanding Shortest Path Bridging ? Mac in Mac – encapsulation ? Control Plane – SPB uses ISIS ? Data Plane – SPB Terminology: BEB, BCB, BVLAN, CVLAN... – Load sharing traffic with SPB’s Equal Cost Trees – Loop suppression using RPFC – SPB’s hierarchical addressing: L2VSN L3VSN – SPB uses Multicast Trees – QOS DiffServ over SPB ? Operations, Administration Maintenance (OAM) – SPB leverages CFM Performance Monitoring Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 16 SPB Terminology ? Customer VLAN (CVLAN) – A traditional VLAN with MAC learning flooding where user devices connect to ? Backbone Edge Bridge (BEB) – SPB node where VSN service terminates – BEB node performs MACinMAC encapsulation/decapsulation for the VSN – BEB is involved in VSN addressing ? Backbone VLAN (BVLAN or BVID) – Special VLAN where MAC table populated by ISIS shortest path calculations – Provides reachability to EVERY BMAC in the SPB work ? Backbone Core Bridge (BCB) – SPB node which does not terminate VSN service – BCB performs forwarding only by looking at outer BMAC header – BCB is unaware of service works it transports BEB BCB BEB CVLAN CVLAN BVLAN VSN Avaya Proprietary. Use pursuant to your signed agreement or Avaya policy. 17 Shortest Path Bridging Equal Cost Paths ? ISIS sees 2 Equal Cost paths between 2 nodes (referred as Equal Cost Trees – ECT) ? SPB work was provisioned with 2 Backbone VLANs (BVIDs) – BVID1 – BVID2 ? ISIS programs 1st Equal Cost path in Forwarding Database of BVID 1 ? ISIS programs 2nd Equal Cost path in Forwarding Database of BVID 2 ? Service Networks (VSNs) are then hashed against one or the other or both (per flow hashing) BVIDs ? SPB defines max of 16 BVIDs ISIS ISIS ISIS ISIS ISIS ISIS Cost =30 Cost =30 BVID1 BVID2 Avaya Proprietary. Use pursuant to your signe