[grc] STL Bandwidth

[Eugene Beer]

> For the usual case of a radio station needing something stable, usually
locking down the DHCP is good enough.

Good point, Al,  I wasn't aware "locking down the DHCP" was available.

When we had a static IP, I believe they provided 5 IP addresses.   At that
time our transmitter was at a City of Columbus Public Safety tower site (a
water treatment plant under Homeland Security directives), so we needed to
schedule a weekday-only escort to gain access to our transmitter.  Not good
if the IP were to change on us....

Eugene

-----Original Message-----
From: al davis [mailto:ad253 at freeelectron.net] 
Sent: Saturday, December 31, 2016 9:30 AM
To: grc at maillist.peak.org
Cc: Eugene Beer
Subject: Re: [grc] STL Bandwidth

On Thu, 29 Dec 2016 12:06:49 -0500
Eugene Beer via grc <grc at maillist.peak.org> wrote:
> We used to pay extra for a static IP, but now use a dynamic one.  Its 
> address has only changed once during the past year when we rebooted 
> the DSL modem, so it's not that big a concern since we can quickly 
> remap the new IP to the DNS domain that we have control of (xxx.wgrn.org).

"Your mileage may vary ..."

One station I used to be involved with had two internets .. one cable, one
DSL .. both standard, both dynamic.

The cable kept its IP number all the time, through many reconnects over a
long time.  No need to pay extra for static here.

The DSL would change several times per week, even in the middle of a
session.  If it was used to source a stream, every time the IP changed the
stream would drop then reconnect with the new number.  After a while, they
decided to pay the extra to lock down the IP number, problem solved.


There is a difference between true static IP and locking down the number on
a DHCP server.  True static IP  usually gives you a protected subnet, and
sometimes more than one number, so it is more expensive.
For the usual case of a radio station needing something stable, usually
locking down the DHCP is good enough.

At the studio, the risk is small.   At the transmitter, a surprise
change of IP number may make it impossible to access anything there.
With some kind of notification, this can be dealt with, but be sure to do
it.