RFC 8361

Transparent Interconnection of Lots of Links (TRILL): Centralized Replication for Active-Active Broadcast, Unknown Unicast, and Multicast (BUM) Traffic, April 2018

Canonical URL:
https://www.rfc-editor.org/rfc/rfc8361.txt
File formats:
Plain TextPDF
Status:
PROPOSED STANDARD
Updates:
RFC 6325
Authors:
W. Hao
Y. Li
M. Durrani
S. Gupta
A. Qu
Stream:
IETF
Source:
trill (rtg)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC8361

Discuss this RFC: Send questions or comments to trill@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF


Abstract

In Transparent Interconnection of Lots of Links (TRILL) active-active access, a Reverse Path Forwarding (RPF) check failure issue may occur when using the pseudo-nickname mechanism specified in RFC 7781. This document describes a solution to resolve this RPF check failure issue through centralized replication. All ingress Routing Bridges (RBridges) send Broadcast, Unknown Unicast, and Multicast (BUM) traffic to a centralized node with unicast TRILL encapsulation. When the centralized node receives the BUM traffic, it decapsulates the packets and forwards them to their destination RBridges using a distribution tree established per the TRILL base protocol (RFC 6325). To avoid RPF check failure on an RBridge sitting between the ingress RBridge and the centralized replication node, some change in the RPF calculation algorithm is required. RPF checks on each RBridge MUST be calculated as if the centralized node was the ingress RBridge, instead of being calculated using the actual ingress RBridge. This document updates RFC 6325.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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