Patent ID: 7525960
Filing Date: 2009-04-28
Classification: H04L

Abstract:
1. A method of performing frame forwarding from a path diverge point to a path merge point for an explicitly routed connection comprising: at the path diverge point: a) forwarding a first set of frames over a first tunnel Label Switched Path (LSP); b) identifying a last frame transmitted over the first tunnel LSP by marking the last frame transmitted over the first tunnel LSP with an LF (last frame) marker; c) switching from the first tunnel LSP to a second tunnel LSP; d) transmitting a second set of frames over the second tunnel LSP; e) identifying a first frame transmitted over the second tunnel LSP by marking the first frame transmitted over the second tunnel LSP with a FF (first frame) marker; and at the path merge point: f) upon receipt of the FF marker, if the LF marker has not already been received, discarding or buffering all received frames until the LF marker is received.