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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: iSCSI and the IPSEC replay windowHmm ... I would have thought that the separate TCP connections for the alternate paths would use separate IPsec SAs and hence would not share a replay window, making this a non- issue. Steve Kent had a number of things to say in the ipsec WG about running IPsec at gigabit speeds, all of which are probably applicable to iSCSI, but best left to the ipsec WG. --David > -----Original Message----- > From: Bernard Aboba [SMTP:aboba@internaut.com] > Sent: Tuesday, January 09, 2001 12:33 PM > To: ips@ece.cmu.edu > Subject: iSCSI and the IPSEC replay window > > At IETF 49, we had a presentation on use of IPSEC in > iSCSI. While I'm generally positive on the concept > of re-using IPSEC in this way, there are some things > to think about. > > One of these is the effect of the IPSEC replay window > on TCP behavior. At the 1+ Gbps speeds of iSCSI, it > strikes me that even a small variation in delay > between two alternate paths will result in falling > outside the IPSEC replay window if it is set to a > small, fixed value (say 64 packets). > > So the size of the IPSEC replay window should probably > scale with transmission speed. > > Do we understand how this ought to work and is there > a potential for some unforseen effects? > > Inquiring minds want to know ;)
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