TRILL RBridge Architecture

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TRILL RBridge Architecture The RBridge Approach to Solving the TRILL Problem

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TRILL RBridge Architecture. The RBridge Approach to Solving the TRILL Problem. Goals in this Iteration. Nail down terms and definitions, Eliminate complex interactions with other protocols and technologies and make a few choices, - PowerPoint PPT Presentation

Transcript of TRILL RBridge Architecture

Page 1: TRILL RBridge Architecture

TRILL RBridge Architecture

The RBridge Approach to Solving the TRILL Problem

Page 2: TRILL RBridge Architecture

Goals in this Iteration

• Nail down terms and definitions,• Eliminate complex interactions with other

protocols and technologies and make a few choices,

• Step forward in defining what must be specified in solution documents (Fill-in Architectural detail),

• Seek input/guidance for future changes and• Accept as a working group document

Page 3: TRILL RBridge Architecture

Terms & Definitions

• Broken into 2 sections, the first provides specific definitions of existing terminology as they apply to RBridges– 802, Ethernet and LAN terminology– Basic Link-State Routing terminology

• The second section defines RBridge specific terminology – especially those that have seemed controversial in dicussion on the list– Relating to RBridge forwarding

• Ingress RBridge Tree – replaces the often confusing references to RBridge spanning trees

• Forwarding Tunnels– “Campus” related terminology including various logical tables– RBridge roles – Edge (Ingress, Egress), DR, Cooperation

Page 4: TRILL RBridge Architecture

Complicated Interactions

• Reduce the amount of specification required for inter-working with other technologies by defining an abstract “co-located functionality” model – Co-located Bridge (potential STP/RSTP BPDU interactions) –

allows us to use “block STP” mode only for an abstract RBridge (see section 4.8).

• Define as optional/allowed functionality, those capabilities relating to optimization– IRT (Ingress RBridge Tree) Pruning

• VLAN Pruning• Multicast Pruning

– Flooding Optimization– ARP/ND Optimization

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Architectural Detail

• Logical Tables– Details on logical content for unicast (CFT) and

flooding/multicast/broadcast (CFT-IRT) logical tables for various RBridge roles

• Details on: – topology discovery, – progression toward operating status –

• Auto-configuration, peer & topology discovery, SPF and IRT computation, learning and forwarding

– Forwarding• Population of the CFT and CTT• Uses of the CFT and CFT-IRT

• Added content to “Conclusions” section.

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Future Changes?

• Input on specific sections?• Further abstraction

– Co-located VLAN (bridging and routing)

• Add More details on VLAN interactions with CFT-IRT (section 4.6.2).

• Add More details on Optimizations?• Complete section 5 (How this architecture

addresses the problem statement.• Standard or Informational?

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Finally

• Accept as a working group document?