RSVP-TE Scalability - Recommendations
2015
RSVP-TE [RFC3209] describes the use of standard RSVP [RFC2205] to
establish Label Switched Paths (LSPs). As such, RSVP-TE inherited some
properties of RSVP that adversely affect its control plane
scalability. Specifically these properties are (a) reliance on
periodic refreshes for state synchronization between RSVP neighbors
and for recovery from lost RSVP messages, (b) reliance on refresh
timeout for stale state cleanup, and (c) lack of any mechanisms by
which a receiver of RSVP messages can apply back pressure to the
sender(s) of these messages. Subsequent to [RFC2205] and [RFC3209]
further enhancements to RSVP and RSVP-TE have been developed. In this
document we describe how an implementation of RSVP-TE can use these
enhancements to address the above mentioned properties to improve
RSVP-TE control plane scalability.
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