Yozo Nitta writes:
> I got additional question from CU.
It would help *greatly* if you could get a statement from the customer
about what problem the user is seeing. I don't mind answering
questions, but answering these detailed questions about system
behavior seems like a very inefficient way to solve a problem. It
seems to me as though we're going in circles around the man pages.
> Q1. Could you tell us how time until port is opened is decided?
> Does it depend on TA or hardware on server?
It depends on the application behavior. When the application makes a
call to the open(2) function, then that action opens the port and
causes DTR (ER) to be asserted.
In the case of pppd(1M), the port is normally opened immediately when
/usr/bin/pppd is invoked. The time when /usr/bin/pppd is invoked is
under user control -- usually either via a script, some other daemon
activity (such as ttymon or mgetty), or direct user invocation.
The exceptions to that rule are:
- When the pppd "demand" option is used, pppd will create the spppN
IPv4/IPv6 interfaces, but will not open the serial port until
packets are seen on those interfaces. When the system attempts to
transmit a packet, pppd will open the serial port and begin the
process of bringing up the link.
- After completing a call with the "persist" option, the user may
specify a "holdoff" period. If one is specified, then that timer
is allowed to elapse before the port is reopened.
> Q2. They want to issue TA command after port is actually opened,
> but is there any way to do it via script like chat script?
Yes, there are at least two ways to do that, and they're described in
the pppd(1M) man page.
connect script Use the executable or shell command
specified by script to set up the
serial line. This script would typi-
cally use the chat(1M) program to
dial the modem and start the remote
PPP session. A value for this option
originating from a privileged source
cannot be overridden by a non-
privileged user.
init script Run the executable or shell command
specified by script to initialize the
serial line. This script would typi-
cally use the chat(1M) program to
configure the modem to enable auto-
answer. A value for this option from
a privileged source cannot be over-
ridden by a non-privileged user.
There's also a "welcome" script that would function in this way, but I
don't think it's applicable for this scenario.
--
James Carlson, Solaris Networking <[EMAIL PROTECTED]>
Sun Microsystems / 1 Network Drive 71.232W Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677
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