Ok, as you said i can verify all compression types on PPPoE test... So i have pppoe-server available at my pc, if you have come across related server configuration for this .... pls do know me. and running PPPoA - test running is not just easy to me as unavailability of the device. Regs, Arun On Thu, Jun 24, 2010 at 4:54 PM, James Carlson <carlsonj@xxxxxxxxxxxxxxx> wrote: > arun b wrote: >> 3) what is shlc ? > > Is it possible you're asking about "slhc?" > > If so, then that's the name of the kernel module on Linux that > implements VJ header compression. That's yet another header compression > mechanism, and is specific to IPv4 TCP. It was basically designed to > make the usual 40 byte highly-predictable TCP header squeeze down to two > or three bytes, so that interactive data (think: "telnet" or "rlogin") > is usable over a slow serial link (think: "modems"). > > Again, pppd(1M) is your friend. It documents the options for turning VJ > header compression on and off and adjusting the number of slots available. > > Header compression does not compress the data itself, and is not in any > way related to CCP. Instead, VJ header compression is negotiated by IPCP. > > (The "slhc" module is Linux-specific, and isn't a generic PPP term. On > other OSes, you'll see VJ compression implemented in other ways.) > > -- > James Carlson 42.703N 71.076W <carlsonj@xxxxxxxxxxxxxxx> > -- To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html