directory assisted rbridge edge draft dunbar trill directory assisted edge 05 update
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Directory Assisted RBridge Edge draft-dunbar-trill-directory-assisted-edge-05 Update. Linda Dunbar: [email protected] Donald Eastlake:[email protected] Radia Perlmen : [email protected] Igor Gashinsky: [email protected]

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directory assisted rbridge edge draft dunbar trill directory assisted edge 05 update

Directory Assisted RBridge Edgedraft-dunbar-trill-directory-assisted-edge-05Update

Linda Dunbar: [email protected]

Donald Eastlake:[email protected]

RadiaPerlmen: [email protected]

Igor Gashinsky: [email protected]

major changes since draft dunbar trill directory assisted edge 04 ietf82
Major changes since draft-dunbar-trill-directory-assisted-edge-04 (IETF82)
  • Addressed comments from mailing list and discussions from 82nd IETF
    • Make the draft focusing on the benefits and generic operation of directory services
      • Minimum attributes in directory servers
      • Pull model
      • Push model
    • Removed technical details like how RBridge intercept ARP/ND requests and forward them to directory servers
      • Push model: Need separate draft(s) on detailed mechanism for directory to push down initial full mapping and subsequent updates
      • Pull model: Need separate draft(s) on detailed messaging exchange between Directory Servers and RBridge.
  • Goal: WG adopt the Directory Assisted TRILL edge concept
trill in data center
TRILL in Data Center

L3 routed domain

  • Server can be loaded with applications under any subnets
  • Minimal IP re-config needed

TRILL Domain

  • Why different?
  • Rapid work load shifting
    • Reduce or increase the number of racks when demand changes.
    • Allow servers to be re-loaded with different applications under different subnets without any physical moving or IP re-configuration.
  • VMs can be moved to any rack without IP re-configuration on any switches
benefit of using directory in data center
Benefit of using directory in Data Center
  • Avoid flooding unknown DA across RBridge domain.
  • Avoid designating one port as AF port:
    • directory assisted RBridge edge doesn’t need to flood unknown DA data frames across RBridge domain
  • Reduce flooding decapsulated Ethernet frames with unknown MAC-DA to a bridged LAN connected to RBridge edge ports.
  • Reduce the amount of MAC&VLAN <-> RBridgeEdge mapping maintained by RBridge edge.
    • No need for an RBridge edge to keep the MAC entries for hosts which don’t communicate with hosts attached to the RBridge edge.
push vs pull models
Push vs. Pull models
  • Push Model
    • Pros: less processing
    • Cons: more entries than they really need
  • Pull Model
    • pulls the MAC&VLAN<->RBridgeEdge mapping entry from the directory server when needed.
    • Pros : smaller set because entries age out after awhile
    • Cons: more processing
next step
Next Step
  • Move to WG draft
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