I-D Action: draft-saucez-lisp-itr-graceful-01.txt
internet-drafts@ietf.org Wed, 26 December 2012 13:55 UTC
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Subject: I-D Action: draft-saucez-lisp-itr-graceful-01.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories. Title : LISP ITR Graceful Restart Author(s) : Damien Saucez Olivier Bonaventure Luigi Iannone Clarence Filsfils Filename : draft-saucez-lisp-itr-graceful-01.txt Pages : 12 Date : 2012-12-26 Abstract: The Locator/ID Separation Protocol (LISP) is a map-and-encap mechanism to enable the communication between hosts identified with their Endpoint IDentifier (EID) over the Internet where EIDs are not routable. To do so, packets toward EIDs are encapsulated in packets with routing locators (RLOCs) to form dynamic tunnels. An Ingress Tunnel Router (ITR) that encapsulates EID packets determines tunnel endpoints via mappings that associate EIDs to RLOCs. Before encapsulating a packet, the ITR queries the mapping system to obtain the mapping associated to the EID of the packet it must encapsulate. Such mapping is cached by the ITR in its local EID-to-RLOC cache for any subsequent encapsulation for the same EID. LISP is scalable because the EID-to-RLOC cache of an ITR, which is initially empty, is populated progressively according to the traffic going through the ITR. However, after an ITR is restarted, e.g., for maintenance reason, its cache is empty which means that all packets that are re- routed to the freshly restarted ITR will cause cache misses and a potentially high loss rate. In this draft, we present mechanisms to reduce the negative impact on traffic caused by the restart of an ITR in a LISP network. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-saucez-lisp-itr-graceful There's also a htmlized version available at: http://tools.ietf.org/html/draft-saucez-lisp-itr-graceful-01 A diff from the previous version is available at: http://www.ietf.org/rfcdiff?url2=draft-saucez-lisp-itr-graceful-01 Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/
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