[EMAIL PROTECTED] wrote:
A similar problem would be created if a web server relied
on DNS that was only hosted on servers in New Orleans.
Do you (or somebody) know of recent numbers of what percentage of
domains have all their DNS servers in;
a) same subnet
b) same AS
c) same geographic
On Thu, Sep 01, 2005 at 09:41:40AM -0700, jc dill wrote:
> It is sometimes the case in disasters that people from inside can call
> out but that people from outside can't call in because the circuits into
> the disaster area become overloaded. This would hold true especially in
> the case wh
, 2005 5:57 AM
To: nanog@merit.edu
Subject: Re: Replacing PSTN with VoIP wise? Was Re: Phone networks struggle
in Hurricane Katrina's wake
> I've had several reports that cell phone users who can't make *or*
> receive calls are successfully sending *and* receiving SMS. It
> I've had several reports that cell phone users who can't make *or*
> receive calls are successfully sending *and* receiving SMS. It could be
> that the problem is one of not enough cell channels and working phone
> circuits for all the phone calls people want to make, but that the SMS
> ch
On Thu, 01 Sep 2005 08:48:04 +0300, Petri Helenius said:
> [EMAIL PROTECTED] wrote:
>
> >It's clearly possible to find telco engineers with 5/10/15 years experience
> >in
> >running PSTN (might even find somebody with 40-50 years? :). It's possible
> >to
> >find network engineers with lots of B
[EMAIL PROTECTED] wrote:
But then, people don't really care about this, as cell is in the
exact same boat and huge numbers of people rely on just their cell
phone and no longer have a fixed line (in Europe at least).
I have read accounts that suggest that cellphone subscribers
from New Orlea
> But then, people don't really care about this, as cell is in the
> exact same boat and huge numbers of people rely on just their cell
> phone and no longer have a fixed line (in Europe at least).
I have read accounts that suggest that cellphone subscribers
from New Orleans only have one way s
[EMAIL PROTECTED] wrote:
It's clearly possible to find telco engineers with 5/10/15 years experience in
running PSTN (might even find somebody with 40-50 years? :). It's possible to
find network engineers with lots of BGP experience. Where do you find a senior
engineer with 5+ years experience
On 31-aug-2005, at 21:19, Andy Davidson wrote:
There are two types of VoIP: voice over a private, tightly
controlled IP network, and voice over the public internet. Now
obviously the latter is a risky proposition, as it imports all
the limitations of the internet into the voice service.
On Wed, 31 Aug 2005 20:19:23 BST, Andy Davidson said:
> Perhaps you've made a fair and good comment on the marurity of most
> off-the-shelf voip products or implementations. But the key, in my
> mind, is that VoIP across the internet, when done well, imports all of
> the opportunities of intern
--On August 31, 2005 2:03:01 PM +0100 [EMAIL PROTECTED] wrote:
<...>
On the other hand, in a circuit switched
network you can do all kinds of interesting stuff (such as restarting
all your control software) without breaking your sessions. We're only
now seeing this in IP, and I think it's not
Iljitsch van Beijnum wrote:
There are two types of VoIP: voice over a private, tightly controlled
IP network, and voice over the public internet. Now obviously the
latter is a risky proposition, as it imports all the limitations of the
internet into the voice service.
I'm not so sure; som
Sorry for the interruption but I wish just once I could follow a
topical list where 50% or more of the traffic wasn't people posting or
arguing about how this or that post was off-topic!
The meta-banter gets worse than the banter; the latter at least
usually touches on some possibly interesting
On Tue, Aug 30, 2005 at 03:48:52PM -1000, Randy Bush wrote:
> the steering committee has been discussing the idea of a nanog blog.
> of course it would be directed to operational content and not your
> daily pointer to some cartoon etc.
Manners, Randy.
Cheers,
-- jra
--
Jay R. Ashworth
> With VoIP, packet loss and delay
> eventually make the service useless. So VoIP fails harder than either
> traditional IP apps and PSTN.
That is only in theory. In practice, during times of
impending congestion collapse, IP network operators
reconfigure the network to cope. For instance when
On 31-aug-2005, at 10:04, Mark Foster wrote:
I do see a risk in the move toward IP systems at the edge. At the
core is a different story to at least some degree.
Twas also pointed out that British Telecom are heading down the
same track as Telecom NZ, and their rollout should be completed
> "Red Cross looks to IT for post-Katrina recovery"
> http://www.computerworld.
> com/securitytopics/security/recovery/story/0,10801,104250,00.html
>
> ..would perhaps elicit some operational suggestions from the peanut
> gallery on how to perhaps assist in this effort, or prhaps contribute
> to
At the risk of replying to myself,
The below article is about the core, not the edge
Theres another article on Telecom's site relating to trials for edge IP
equipment. So my take on the NZ situation was a bit warped.
I do see a risk in the move toward IP systems at the edge. At the
core i
Fergie (Paul Ferguson) wrote:
Telephone companies struggled to restore service
FYI - if you are trying to reach someone in the impacted area who has a
cell phone but you can't get thru because "all circuits are busy" then
give SMS a try. I exchanged 8 SMS messages[1] between 15:58 and 16:2
Telecom New Zealand announced the other day their intention to do
precisely this.
"In relatively short order we will replace the entire PSTN and be
delivering all our services for customers over the IP network. That has
the potential to reduce costs for customers and put a lot more control a
On Wed, 31 Aug 2005, Fergie (Paul Ferguson) wrote:
If I was mistaken in thinking that the referenced article:
"Red Cross looks to IT for post-Katrina recovery"
http://www.computerworld.com/securitytopics/security/recovery/story/0,10801,104250,00.html
..would perhaps elicit some ope
On Tue, Aug 30, 2005 at 09:12:51PM -0400, Richard A Steenbergen wrote:
>
> > >>"In this age of cheap commoditized consumer electronics and
> > >>advanced mobile technology, why can't all the people of a city make
> > >>contact during an emergency?
> > >
> > >Simple: it's too expensive.
> > >
> >
On Wed, 31 Aug 2005, Fergie (Paul Ferguson) wrote:
I'll file that comment where it belongs -- in file 13.
If a major catastrophe, albeit more human than network-related
(although lots of network-related issues here, too), isn't on-topic,
than I fail to see what is.
The danger here is that if
Wrong Paul.
- ferg
p.s. I'm doing a blog already. I also run a few networks. It's
all relative. Feel free to experiment at will! ;-)
- ferg
-- Randy Bush <[EMAIL PROTECTED]> wrote:
>> I'll file that comment where it belongs -- in file 13.
manners, paul
>> If a major catastrophe, albeit
You get high marks for your crumudgeon level.
However, if I have to point it out and lead you to it
like a child, then so be it.
If I was mistaken in thinking that the referenced article:
"Red Cross looks to IT for post-Katrina recovery"
http://www.computerworld.com/securitytopics/security/reco
>> I'll file that comment where it belongs -- in file 13.
manners, paul
>> If a major catastrophe, albeit more human than network-related
>> (although lots of network-related issues here, too), isn't on-topic,
>> than I fail to see what is.
> operational material maybe? nah, i'm just a confused
On Wed, Aug 31, 2005 at 01:22:13AM +, Fergie (Paul Ferguson) wrote:
>
> I'll file that comment where it belongs -- in file 13.
>
> If a major catastrophe, albeit more human than network-related
> (although lots of network-related issues here, too), isn't on-topic,
> than I fail to see what i
- Original Message -
From: "Fergie (Paul Ferguson)" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc:
Sent: Tuesday, August 30, 2005 9:22 PM
Subject: Re: Phone networks struggle in Hurricane Katrina's wake
>
> I'll file that comment where it
I'll file that comment where it belongs -- in file 13.
If a major catastrophe, albeit more human than network-related
(although lots of network-related issues here, too), isn't on-topic,
than I fail to see what is.
- ferg
-- Richard A Steenbergen <[EMAIL PROTECTED]> wrote:
Did I miss the memo
> >>"In this age of cheap commoditized consumer electronics and
> >>advanced mobile technology, why can't all the people of a city make
> >>contact during an emergency?
> >
> >Simple: it's too expensive.
> >
> >Keep this in mind when trading in your POTS service for VoIP service
> >over the int
Apologies for the multiple posts, but I think this is important
enough to warrant a follow-up.
I send out a public challenge to each and every one of you
reading this to make a donation to the American Red Cross,
if for nothing else, think of it as a small effort to assist
the Red Cross in their
On 30-aug-2005, at 22:08, Fergie (Paul Ferguson) wrote:
"In this age of cheap commoditized consumer electronics and
advanced mobile technology, why can't all the people of a city make
contact during an emergency?
Simple: it's too expensive.
Keep this in mind when trading in your POTS servi
Me? I personally never trade my POTS for VoIP...
- ferg
-- Iljitsch van Beijnum <[EMAIL PROTECTED]> wrote:
On 30-aug-2005, at 22:08, Fergie (Paul Ferguson) wrote:
> "In this age of cheap commoditized consumer electronics and
> advanced mobile technology, why can't all the people of a city
On 30-aug-2005, at 22:08, Fergie (Paul Ferguson) wrote:
"In this age of cheap commoditized consumer electronics and
advanced mobile technology, why can't all the people of a city make
contact during an emergency?
Simple: it's too expensive.
Keep this in mind when trading in your POTS serv
And via Slashdot:
[snip]
"In this age of cheap commoditized consumer electronics and advanced mobile
technology, why can't all the people of a city make contact during an
emergency? Cell phone circuits filled up during 9/11 attacks and in the wake of
hurricane Katrina very few victims can mak
lf Of
Fergie (Paul Ferguson)
Sent: Tuesday, August 30, 2005 2:46 PM
To: nanog@merit.edu
Subject: Phone networks struggle in Hurricane Katrina's wake
Via Reuters.
[snip]
Telephone companies struggled to restore service and measure the damage
to their networks in Louisiana and Mississippi on Tue
Via Reuters.
[snip]
Telephone companies struggled to restore service and measure the damage to
their networks in Louisiana and Mississippi on Tuesday after Hurricane Katrina
cut power and triggered severe flooding.
A spokesman for BellSouth Corp., the largest local telephone company in the
r
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