RE: Line send delay (I've seen the problem)

  I agree with John, that problem should be mitigated by the controlling
(script-sending) host.

  But, it would be nice if there were a way to tell a Console Server
port to slow the outbound traffic (from the console server to the
attached serial console), so that many different admins using different
clients wouldn't all have to learn how to solve this problem
individually. Of course, the inbound traffic (from the serial attached
console to the console server) should not be 'paced', as that would
reduce the capacity of how much you could log in a given time window.

  So far, I can't find a way to do this on the console servers. I guess
this is another 'feature request' to be considered by the Console Server
manufacturers... and they'll only add it if we (their customers) ask for
it. Even if you don't need it today, you might need it later. ;-)

    Best regards,

           -Z-

David 'Zonker' Harris
Silicon Valley Service Delivery Center, Network Operations

Siemens IT Solutions and Services, Inc. 
Infrastructure Management Services
39600 Eureka Drive
Newark, CA  94560
Tel:    510 624-5524
Fax:    510 624-5508
mailto: david.k.harris@siemens.com 
www.usa.siemens.com/it-solutions
 

-----Original Message-----
From: John.Stoffel@taec.toshiba.com
[mailto:John.Stoffel@taec.toshiba.com] 
Sent: Thursday, December 13, 2007 1:35 PM
To: Harris, David (IT Solutions US)
Subject: Re: Line send delay (I've seen the problem)

In this situation you should then use expect to do your cisco
programming, even if yopu use conserver as the transport.   

Fixing it at the conserver level is using a wrench for a soldering gun!


John




----- Original Message -----
From: "Harris, David (IT Solutions US)" [david.k.harris@siemens.com]
Sent: 12/13/2007 11:28 AM PST
To: John Stoffel
Subject: RE: Line send delay (I've seen the problem)




  I have seen this, especially with older Cisco gear, but also with
current gear on 'some' commands. The problem is that the Cisco device
needs time to 'think' for some of the commands (setting up internal
tables, parsing Access Control List commands into a firewall fabric,
etc.)... If you throw the next lines in before the device has finished
thinking, it misses your command, or it misses some characters.

  The Cisco doesn't seem to buffer all the input, so that's the root of
the problem... when the system thinks, it seems to not buffer the next
characters until its ready to listen again. (I haven't looked to see if
they invoke hardware or software flow control when you are pasting in a
bunch of lines like that.) The symptom is that the configs don't paste
well (the same symptoms occur when you do an ASCII upload of a config
script). The 'field fix' includes pacing the lines (wait after each
carriage return), or adding an extra linefeed or two (padded with space
characters) after the problem commands in your scripts. But the problem
remains on Cisco gear even with current versions, which is why Cisco can
sell their configuration tools for Big Bucks. ;-)

     -Z-

David 'Zonker' Harris
Silicon Valley Service Delivery Center, Network Operations

Siemens IT Solutions and Services, Inc. 
Infrastructure Management Services
39600 Eureka Drive
Newark, CA  94560
Tel:    510 624-5524
Fax:    510 624-5508
mailto: david.k.harris@siemens.com 
www.usa.siemens.com/it-solutions
 
-----Original Message-----
From: users-bounces@conserver.com [mailto:users-bounces@conserver.com]
On Behalf Of John Stoffel
Sent: Thursday, December 13, 2007 10:42 AM
To: perlch
Cc: users@conserver.com
Subject: Re: Line send delay


perlch> Is it possible to set a "send line delay" on conserver.

I don't think so.

perlch> This option allows the user to set the number of milliseconds
perlch> that conserver pauses after sending a carriage return.

This should be more of an issue with your terminal than with conserver.

perlch> I have problem, if I want do configure a cisco router, because
perlch> in some cases(commands) I must wait 250ms.

This is news to me.  what exactly happens if you don't wait?  And what
happens if you use a direct serial connection to the router and
configure it?

More details please.

John
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