stored rtt values?

stored rtt values?

Post by Jon Zee » Wed, 21 Oct 1998 04:00:00



I can't convince myself that tcp_rtt_updates works in Solaris 2.6.
On a server, I add a route table entry with:

route add maya 206.252.29.1 -rtt 10000

and I execute:

$ ndd -set /dev/tcp tcp_rtt_updates 2

I now go to the machine maya and do a few file transfers.  Back on
the server, I execute:

$ route get maya

and see

 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu
       0         0         0        10         0         0      1366

Notice that the rtt is exactly where I set it, instead of some other
learned number as expected.

Any ideas?  Also, it looks like recvpipe, sendpipe and
rttvar cannot be set in the route table (they always stay at zero).

 
 
 

stored rtt values?

Post by Jon Zee » Fri, 23 Oct 1998 04:00:00


I can't convince myself that tcp_rtt_updates works in Solaris 2.6.
On a server, I add a route table entry with:

route add maya 206.252.29.1 -rtt 10000

and I execute:

$ ndd -set /dev/tcp tcp_rtt_updates 2

I now go to the machine maya and do a few file transfers.  Back on
the server, I execute:

$ route get maya

and see
 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu
       0         0         0        10         0         0      1366

Notice that the rtt is exactly where I set it, instead of some other
learned number as expected.

Any ideas?  Also, it looks like recvpipe, sendpipe and
rttvar cannot be set in the route table (they always stay at zero).