TRILL (TRansparent Interconnection of Lots of Links) is an Internet Engineering Task Force (IETF) Standard implemented by devices called RBridges (Routing Bridges) or TRILL Switches. TRILL combines techniques from bridging and routing and is the application of link state routing to the VLAN-aware customer-bridging problem.
TRILL is a replacement for Spanning Tree Protocol (STP). Layer 3 routing capabilities brought into Layer 2 capabilities.
IS-IS routing
Layer 2 IS-IS
IS-IS is pre-built with IPv6, very flexible.
The Layer 3 intelligence is on IS-IS.
Radia Perlman, who designed the Spanning Tree Protol to prevent loops in redundant and multipath networks, worked on routing the shortest path between switches in a Layer 2 fabric.
TRILL is fundamentally a Layer 2 implementation in order to find the shortest path between a fabric of Layer 2 switched devices. And it eliminates STP.
TRILL uses the concept of Equal Cost MultiPathing (ECMP). And uses Conversational MAC Learning instead of the Traditional MAC Learning to obtain MAC addresses from connected devices.
TRILL is a replacement for Spanning Tree Protocol (STP). Layer 3 routing capabilities brought into Layer 2 capabilities.
IS-IS routing
Layer 2 IS-IS
IS-IS is pre-built with IPv6, very flexible.
The Layer 3 intelligence is on IS-IS.
Radia Perlman, who designed the Spanning Tree Protol to prevent loops in redundant and multipath networks, worked on routing the shortest path between switches in a Layer 2 fabric.
TRILL is fundamentally a Layer 2 implementation in order to find the shortest path between a fabric of Layer 2 switched devices. And it eliminates STP.
TRILL uses the concept of Equal Cost MultiPathing (ECMP). And uses Conversational MAC Learning instead of the Traditional MAC Learning to obtain MAC addresses from connected devices.
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