To request a confirmation for its reservation request, receiver Rj includes in the Resv message a confirmation request object containing Rj's IP address.
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At each merge point, only the largest flowspec and any accompanying confirmation-request object is forwarded upstream.
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If the reservation request from Rj is equal to or smaller than the reservation in place on a node, its Resv is not forwarded further
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If the Resv included a confirmation-request object, a ResvConf message is sent back to Rj.
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