This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages)(Learn how and when to remove this template message)
HSMP LSP is hub & spoke multipoint Label Switched Path (LSP), which allows traffic both from root to leaf through point-to-multipoint (P2MP) LSP and also leaf to root along the reverse path. That means traffic entering the HSMP LSP from application/customer at the root node travels downstream to each leaf node, exactly as if it is travelling downstream along a P2MP LSP to each leaf node. Upstream traffic entering the HSMP LSP at any leaf node travels upstream along the tree to the root, as if it is unicast to the root. Direct communication among the leaf nodes is not allowed.
IETF MPLS Working Group is standardizing the HSMP LSP. The LDP based HSMP LSP is standardized in http://tools.ietf.org/html/draft-ietf-mpls-mldp-hsmp-06. The RSVP-TE based HSMP LSP is standardized in http://tools.ietf.org/html/draft-ietf-mpls-rsvp-te-hsmp-lsp-01.
HSMP LSP could be used in various scenarios, e.g., IEEE 1588 time synchronization, P2MP LSP protection, etc.
- MPLS Architecture, RFC 3031
- LDP Extensions for Hub & Spoke Multipoint Label Switched Path
- Hub and Spoke Multipoint Label Switched Path Tunnels
|This computer networking article is a stub. You can help Wikipedia by expanding it.|