Does RCP support RFC 1323 Window Scaling?

[Satyavrat Purohit]

On HPUX 11i, has anyone any experience with using rcp options -S and
-R ?

eg.

rcp -S 131072 -R 131072 bar user@foo:/foo/bar

I was expecting this to result in TCP Window Scaling factor of 2. The Window Scale option does appear within the SYN/SYN_ACK but the window scaling appears to be set to 0 (the option looks like 0x"030300" i.e. window scale of 2**0 = no window scale)

I hadn't modified ndd tcp_recv/xmit_hiwater_def/lnp/lfp values and I'm testing it over a LAN. HPUX doc suggests that all you need to do is set so_recvbuf and you get the window scaling you need and from rcp documentation it seemed that the -S and -R options were designed to do just that. It doesn't seem to work that way though.

Separately, I tried setting tcp_recv/xmit_hiwater_def to 131072. This resulted in the source host advertising a scaled window, but the dest host still responds with an unscaled window.... I'll try this and pulling the file rather than pushing it next...

... any clues?

Thanks

[Satyavrat Purohit]

Sorry, sysadmin was probably the wrong group to pot to, reposting to the networking forum