A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IP Security Protocol Working Group of the IETF.
Title : IKEv2: ECN Requirements for IPsec Tunnels
Author(s) : D. Black
Filename : draft-ietf-ipsec-ikev2-ecnfix-00.txt
Pages : 7
Date : 2003-1-22
IPsec (IP Security) tunnel encapsulation and decapsulation were
specified prior to the addition of ECN (Explicit Congestion
Notification) to IP, with the potential result that ECN congestion
indications could be discarded by IPsec tunnel decapsulators. The
current ECN specification includes two ECN operating modes for
IPsec tunnels to avoid this situation, and IKEv1/ISAKMP (Internet
Key Exchange/Internet Security Association and Key Management
Protocol) negotiation extensions to enable ECN to be used correctly
with IPsec tunnels. To simplify this situation, IKEv2 requires
changes to tunnel decapsulation that prevent discarding of ECN
congestion indication, obviating the need for multiple ECN
operating modes and associated negotiation support.
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