[TRILL] TRILL Summary for TRILL Test Suite

The following item list is about the key points for each test case in the TRILL Interoperability Test Suite Document.
  • IS-IS
    • For Neighbor Info in Hello Message
      • All RBridges must become adjacent with one another. TRB0 and TRB1 must list each other as neighbors in their TRILL Hellos on link 1. TRB1 and TRB2 must list each other as neighbors in their TRILL Hellos on link 3. TRB0 and TRB2 must list each other as neighbors in their TRILL Hellos on link 2.
  • Designated RBridge Election is based on
    • Priority and MAC Address to solve the tiebreak
  • Incremental Deployment Functionality
    •  
  • Nickname Collision is solved by
    •  Priority, IS-IS System ID
  • Configure TRB1 and TRB2 to have an MTU of 1280 on link 3
    •   The Campus Wide MTU Sz value must be 1280 on all RBridges. The orginatingLSPBufferSize in each RBridge’s LSP must be set to 1280.
  • RBridges perform IP Snooping for multicast data 
    • TES3 sends multicast data for IPv4 multicast group 224.0.6.130 on link 3.
      1. TES0 sends an IGMPv3 to exclude nothing for multicast group 224.0.6.130 on link 0.
        • The multicast data must reach TES0.
      2. TES0 sends an IGMPv3 to include nothing for multicast group 224.0.6.130 on link 0. 
        • The multicast data must not reach TES0.
  •  RBridges receive and transmit BPDUs correctly
    • Inhibits the appointed forwarder for a period of time between zero and 30 seconds on Root Bridge Change
    • Sends Topology Change BPDU on change of Appointed Forwarder
      • When RBridge ceases to be appointed forwarder for noe or more VLANs out a particular port, it SHOULD, as long as it continues to receive spanning tree BPDUs on the port, send topology change BPDUs until it sees the topology change acknowledges in a spanning tree configuration BPDU.
  • Hop Count Handling
    • Transit RBridge must decrease the TRILL hop count of the encapsulated frames
  • RBridge Loss and Link Loss Handling
    • Unicast Pathway RBridge Loss
    • Unicast Pathway Link Loss
    • Distribution Tree Root Loss
    • Distribution Tree Root Link Loss
      • TRB1 must notify TRB0 of the link failure through transmission of an updated IS-IS LSP.
    • Distribution Tree RBridge Loss
      • TRB0 must be the appointed forwarder on link 0, 1 and 2. TRB1 must be the appointed forwarder on link 3.
    • Distribution Tree RBridge Link Loss
      • TRB2 must notify TRB0 of the link failure through transmission of an updated IS-IS LSP.
  • Shortest Path First Calculation
    •  TRILL distribution trees are calculated with the shortest path first algorithm
  • Root Choice
    • RB will be the root  of distribution tree with high priority
    • If equal priority occurs, choose higher IS-IS System Id
    • Distribution Tree Root Priority Max Bound is 0xFFFF
  • Number of Trees to calculate
    • The number of computed distribution tree is not greater than the number of  maximum computed distribution tree
    • Load balancing will use the multiple distribution trees
  • Set of Trees to calculate
    • to advertise a set of root can generate multiple distribution tree root
  • Tie Breaking
    • Nickname could be refer to distribution tree root
  • No Receivers Pruning
    • Distribution tree will be pruned when there is no receivers on the link.
  • VLAN

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