> On Sat, 3 May 1997, Rick Wagner wrote:
>
> > When I set up the circuit everything runs fine for about 10 minutes and
> > then traffic stops flowing. If I do a reset S1 at one end the circuit goes
> > into a connecting state and will not come back up until I do a hard reboot
> > of the TSU.
>
> How is the circuit clocked? You may need to set one of the TSUs to
> internal clock and the other one to network clocked. In some cases the
> clock is supplied by telco, and both need to be set to network.
>
> Consult with the telco and ascertain how the circuit is clocked and set
> your TSUs accordingly.
>
That's probably a good place to look but also check for any errors while
the lines are up and running. You should also note that the telco's
usually "stress test" the line from some common point which means that
they don't test the whole line as it normally runs unless they're out at
your site with a test set. More than once we've had to tell them "don't
look to the ends, look where you are!" ]
You can also stress the line yourself a bit using ping with various
patterns. The "1and7" pattern (ping -p 01 hostname.com) will tend to show
wiring and connection problems, others will show other types of
failures. I have a shell script which runs through a number of patters
with long pings and which usually will show up a problem if there's one
there.