Hi Geoff, On Sat, May 23, 2009 at 12:25 AM, Geoffrey Pendery <ge...@pendery.net> wrote: > If I'm "core WAAS", and I see a new TCP conn > come in, I need to know just by looking at this conn whether it's > coming from another WAAS or just an end host. So if I'm taking a new > conn from an end host, when I pass it on I need to modify it so that > other WAASes (WAASi? WAASen? ouch.) know that I'm out there.
Discovery of other WAAS devices is performed using TCP options. I haven't captured a SYN as it travels from an end host, through a WAAS, towards the destination, but I imagine that within the TCP option 'payload', the WAAS embeds its ID which is known to the far-end WAAS by virtue of their common link with the Central Manager. Pure speculation, but anyway, discovery IS performed using TCP options. It is possible for a WAAS device to pass-through a connection without modifying the packet (TCP header) contents at all. cheers, Dale _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
