kk downing wrote:
>
> What was the point in encapsulationg PPP in a GRE packet
> and then an IP packet?
> [... why not] encapsulate the PPP packet inside the IP header?
Because PPP isn't defined as a unique IP protocol ID, and the
range only has 255 slots? :)
Seriously though, it doesn't have that much of an impact.
If I recall correctly, a GRE header is only something like 16 bytes,
and offers some additional "features" like source routing (aargh)
and channel identifiers that (in theory) let you run several
separate tunnels between the same two IPs, even with different
protocols.
--
Mikael Olsson, Clavister AB
Storgatan 12, Box 393, SE-891 28 �RNSK�LDSVIK, Sweden
Phone: +46 (0)660 29 92 00 Mobile: +46 (0)70 26 222 05
Fax: +46 (0)660 122 50 WWW: http://www.clavister.com
"Senex semper diu dormit"
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