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MAY, SHOULD, MUST (2)
RBridges:
SHOULD store a successfully acquired nickname in non-volatile memory and attempt to reuse it on reboot
SHOULD implement an "optimized ARP/ND response"
MUST learn the location of endnodes.
MUST calculate a distribution tree for every RBridge with RequestTree TRUE or for the RBridge with lowest ID if none have RequestTree TRUE
MUST comply with the decision of Rn to be the root of a distribution tree
Pseudonodes (shared links) MUST set RequestTree = FALSE
PPT Version