nanog mailing list archives

Re: OOB core router connectivity wish list


From: Jared Mauch <jared () puck nether net>
Date: Thu, 10 Jan 2013 10:02:03 -0500


On Jan 10, 2013, at 9:51 AM, Mikael Abrahamsson <swmike () swm pp se> wrote:

On Thu, 10 Jan 2013, Christopher Morrow wrote:

       - rs232: please no.  it's 2013.  I don't want or need a protocol which
was designed for access speeds appropriate to the 1980s.

I don't think you can get ethernet and transport out-of-the-area in
some places at a reasonable cost, so having serial-console I think is
still a requirement.

I don't understand this argument.

Are you connecting your CON directly to something that transports it out-of-the-area? Modem?

Yes, we have done this in a site with one device.

If you have a consolerouter there with T1 interface as link to outside world, what's wrong with having ethernet port 
from that T1 router to the ethernet OOB port on the router needing OOB access, instead of having RS232 port on them. 
It's cheaper and easier to cable ethernet compared to RS232. RS232 has much shorter cable length compared to ethernet 
(9600 reaches 20 meters or so).

I certainly want to use something more modern, having run Xmodem to load images into devices or net-booted systems with 
very large images in the past…

I've seen all sorts of creative ways to do this (e.g.: DSL for OOB, 3G, private VPLS network via outside carrier).  It 
is a challenge in the modern network space.  Plus I have to figure that 9600 modems are going to be harder to find as 
time goes by.. at some point folks will stop making them. 

- Jared

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