Transparent Interconnection of Lots of Links (TRILL) Distributed Layer 3 Gateway, September 2016
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- PROPOSED STANDARD
- W. Hao
- trill (rtg)
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The base TRILL (Transparent Interconnection of Lots of Links) protocol provides optimal pair-wise data frame forwarding for Layer 2 intra-subnet traffic but not for Layer 3 inter-subnet traffic. A centralized gateway solution is typically used for Layer 3 inter-subnet traffic forwarding but has the following issues:
1. Sub-optimum forwarding paths for inter-subnet traffic.
2. A centralized gateway that may need to support a very large number of gateway interfaces in a Data Center, one per tenant per Data Label used by that tenant, to provide interconnect functionality for all the Layer 2 Virtual Networks in a TRILL campus.
3. A traffic bottleneck at the gateway.
This document specifies an optional TRILL distributed gateway solution that resolves these centralized gateway issues.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.