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Re: RSVP and RSVP-TE

  • From: "Victoria Fineberg" <fineberg@illinoisalumni.org>
  • Date: Mon, 17 Dec 2001 08:01:15 -0500
  • Resent-Date: Mon, 17 Dec 2001 09:54:02 -0500
  • To: "Revathi C" <revathi_c@infy.com>, <mpls-ops@mplsrc.com>
  • X-OriginalArrivalTime: 17 Dec 2001 13:00:41.0769 (UTC) FILETIME=[D510F990:01C186FA]
  • X-Originating-IP: [63.61.181.217]

Revathi,

RSVP-E2E = End-to-End
TE = Tunneling Extensions

• RSVP-E2E provides signaling between pairs of hosts; RSVP-TE signals between
routers.
• RSVP-E2E applies to single host-to-host flows; RSVP-TE creates a state for a
collection of flows between the ingress and egress points of a traffic trunk.
An LSP aggregates multiple host-to-host flows and thus reduces the amount of
RSVP states in the network.
• RSVP-E2E provides a distributed reservation state; RSVP-TE installs a
distributed packet forwarding state.
• RSVP-E2E uses routing protocols operating on the destination address; RSVP-TE
uses CR.
• RSVP-E2E uses a soft state model which may create scalability, latency and
traffic overhead problems.  RSVP-TE model uses a firm state where Path and Resv
messages are periodically refreshed but their volume is significantly reduced
comparing to the soft state by using aggregated and incremental refreshes (firm
state is still “softer” than the hard state of CR LDP).

Regards,

Victoria

Victoria Fineberg
fineberg@illinoisalumni.org


----- Original Message -----
From: "Revathi C" <revathi_c@infy.com>
To: <mpls-ops@mplsrc.com>
Sent: Monday, December 17, 2001 4:19 AM
Subject: RSVP and RSVP-TE


Hi all,

           What are the basic differences between RSVP and RSVP-TE ?

Regards,
Revathi.

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