FCoTR
Fibre Channel over Token Ring (FCoTR) is a new protocol, first proposed on July 15, 2010 at the Seattle Tech Field Day 2010. It was first proposed by Ethan Banks, a well known industry veteran with many protocols under his belt.
Information about this protocol is sparse at this time, for obvious reasons, but there is a blog and an alliance already created.
Layer 2 protocol considerations
LLC2 transport over Token Ring ensures reliable end-to-end delivery on Layer 2, but is not used by FCoTR due to its small windows sizes and limited packet sizes. It has been decided to implement a totally new thin layer on top of 802.5 to decrease the end-to-end latency and increase the window sizes to values comparable to jumbo frames on Gigabit Ethernet FCoE implementations.
Layer 2 routing
FCoTR uses layer-2 extensions for IS-IS but adds Token-Ring specific Type-Lenght-Value (TLV) attributes. Use of IS-IS and TLV extensions compatible with other modern bridging implementations ensure seamless integration of FCoTR with other converged infrastructure Fiber Channel solutions (for example, FCoE with TRILL or OTV).
Information about this protocol is sparse at this time, for obvious reasons, but there is a blog and an alliance already created.
Layer 2 protocol considerations
LLC2 transport over Token Ring ensures reliable end-to-end delivery on Layer 2, but is not used by FCoTR due to its small windows sizes and limited packet sizes. It has been decided to implement a totally new thin layer on top of 802.5 to decrease the end-to-end latency and increase the window sizes to values comparable to jumbo frames on Gigabit Ethernet FCoE implementations.
Layer 2 routing
FCoTR uses layer-2 extensions for IS-IS but adds Token-Ring specific Type-Lenght-Value (TLV) attributes. Use of IS-IS and TLV extensions compatible with other modern bridging implementations ensure seamless integration of FCoTR with other converged infrastructure Fiber Channel solutions (for example, FCoE with TRILL or OTV).
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