Re: Proposed text changes to ESPbis and AHbis for multicast support

[Mark Baugher <mbaugher@xxxxxxxxx>]

Russ
  Since the destination address is used with the SPI as part of the 
multicast SA lookup in IPsecbis, I don't see any advantage to encoding the 
SPI with special information.

Mark
At 02:57 PM 1/8/2003 -0500, Russ Housley wrote:
> Mark:
>
> I understand that the destination address provides this 
> information.  However, my understanding is that people who have tried to 
> implement this stuff for very high-speed environments have found the 
> gathering of information from various sources in the IP and ESP headers is 
> a major portion of the overall small packet processing time.  I was 
> wondering if this was a cheap way to assist them.
>
> Russ
>
> At 09:15 AM 1/6/2003 -0800, Mark Baugher wrote:
> > The receiver can deduce that by the type of address, unicast or multicast 
> > (IPv4 or v6).  So there is no need to use the SPI for this purpose.