Satellites often sit at the edge of the network. The "orbital last
mile" for individual users as well as in-country (Africa for e.g.) ISPs
and Enterprise networks. When they go, often there is no backup (except
maybe another satellite connection).
Sean Donelan wrote:
On Tue, 6 Jan 2009, Pau
JF Mezei wrote:
> Northern communities in Canada's arctic rely exclusively on satellite
> for voice/data.
>
> Not a lot of data flowing comparatively, but it is their only option so
> it is more of a "mission critical" thing than a backup.
Also high latitudes are problematic as far as your link b
On Tue, 6 Jan 2009, Paul Donner wrote:
WRT Kevin's query, if you are concerned about a solar incident and it's
affects on satcom, you might want to take a look at what user base (e.g.
which mobile users and what impact loss of comm will have on what they are
doing) is affected rather than under
Northern communities in Canada's arctic rely exclusively on satellite
for voice/data.
Not a lot of data flowing comparatively, but it is their only option so
it is more of a "mission critical" thing than a backup.
Jeffrey,
While technically you are correct, I would say that you probably should
also add a category for mobile communications LAND/SEA/AIR. The traffic
for these will be increasing in time as vendors are starting to put
switches and routers on-board spacecraft making applications that were
RD> Date: Wed, 7 Jan 2009 09:48:16 +0800
RD> From: Roland Dobbins
RD> When one has a network/system in which the basic security BCPs
RD> haven't been implemented, it makes little sense to expend scarce
RD> resources testing when those resources could be better-employed
RD> hardening and increasing
On Jan 7, 2009, at 9:40 AM, Edward B. DREGER wrote:
Even when a system is highly deterministic, such as a database, one
still expects _real-world_ testing. Traffic flows on large networks
are
highly stochastic... and this includes OPNs, which I posit are
futile to
attempt to model.
Sure
I propose that we create two Internets. One can be the "testing"
Internet, and the other can be "production". To ensure that both
receive adequate treatment, they can trade places every few days. If
something breaks, it can be moved from "production" to "testing".
The detection of hyperbole, sa
RD> Date: Wed, 7 Jan 2009 08:50:46 +0800
RD> From: Roland Dobbins
RD> > I've seen _many_ routing problems appear in large WANs that simply
RD> > can't be replicated with fewer than a hundred or even a thousand
RD> > routers.
RD> Users can simulate many of these conditions themselves using various
On Jan 7, 2009, at 1:05 AM, Stephen Sprunk wrote:
I've seen _many_ routing problems appear in large WANs that simply
can't be replicated with fewer than a hundred or even a thousand
routers.
Users can simulate many of these conditions themselves using various
open-source and commercial
On Tue, 6 Jan 2009, kevin.sm...@dca.state.fl.us wrote:
Participting in a severe solar event EXERCISE. Can anyone give me an
educated guesstimate of the percentage of backbone traffic that is
satellite dependent vs. that which is totally land-based?
The last FCC statistics I found researching t
Kevin,
Satellite transport is common mainly in areas where land based
infrastructure is not feasible. In developed nations this is almost
exclusively the case. Satellite latency is far too high to rely on it
for routine communications unless used as a last resort.
Best regards, Jeff
On Tue, Jan
On Tue Jan 06, 2009 at 03:34:31PM -0500, kevin.sm...@dca.state.fl.us wrote:
> Participting in a severe solar event EXERCISE. Can anyone give me an
> educated guesstimate of the percentage of backbone traffic that is
> satellite dependent vs. that which is totally land-based?
Depends on the countr
All,
Participting in a severe solar event EXERCISE. Can anyone give me an
educated guesstimate of the percentage of backbone traffic that is
satellite dependent vs. that which is totally land-based?
Thanks
Kevin Smith
Information Systems & Services
Department of Community Affairs
kevin.sm..
It can be done very quickly. We've committed to fast delivery.
The terrestrial conduit and fibre is ready to go ...
Roderick S. Beck
Director of European Sales
Hibernia Atlantic
13-15, rue Sedaine, 75011 Paris
http://www.hiberniaatlantic.com
Wireless: 1-212-444-8829.
French Landline: 33+1+4355+
cK> Date: Tue, 6 Jan 2009 07:40:16 -0500 (EST)
cK> From: chloe K
cK> Why it needs default routes when running BGP?
If you have a full table, you do not need default. It's even desirable
to drop road-to-nowhere packets inside your network, before they clog up
your connections.
However, consider
KC> Date: Mon, 5 Jan 2009 21:52:12 -0600
KC> From: Kai Chen
KC> Will this default route 0.0.0.0/0 be exporting to AS-level
KC> neighbors?
You can have it exported, or you can have it not exported. It depends
how the route is known (eBGP? OSPF? static?) and what you set BGP to
redistribute.
Edd
--- On Tue, 1/6/09, Justin Shore wrote:
> David Barak wrote:
> > Consider for a moment a large retail chain, with
> several hundred or a couple thousand locations. How big a
> lab should they have before deciding to roll out a new
> network something-or-other? Should their lab be 1:10 scale?
>
If an Industrial Ethernet switch is required it may be productive to
look at Ruggedcom products. Ruggedcom has a published upper operating
range of +85 C, which we have deployed in outside non-HVAC enclosures in
environments where the outside ambient temperature can reach +49 to +55
C for extended
Justin Shore wrote:
David Barak wrote:
Consider for a moment a large retail chain, with several hundred or a
couple thousand locations. How big a lab should they have before
deciding to roll out a new network something-or-other? Should their
lab be 1:10 scale? A more realistic figure is tha
David Barak wrote:
Consider for a moment a large retail chain, with several hundred or a couple
thousand locations. How big a lab should they have before deciding to roll out
a new network something-or-other? Should their lab be 1:10 scale? A more
realistic figure is that they'll consider t
Used a MACH4002 as multicast router at 25C3 (among many other locations
in the conference/building network as pure L2 devices). Worked flawlessly.
-- Niels.
* cbr...@bofhserver.net (Cristian Bradiceanu) [Tue 06 Jan 2009, 16:27 CET]:
We have a good experience with Hirschmann (now Beld
We have a good experience with Hirschmann (now Belden) industrial
switches, OpenRail RS30 and Modular MICE series. They had some pretty
funny software bugs with older software versions. We are using them in
MAN ring networks with heavy multicast traffic.
Cristian
On Tue, Jan 6, 2009 at 8:27 AM,
Guess I'll have to go back and look at wireshark output again... I didn't
recall seeing sequence number used in pings between Cisco devices, although
that may just be the implementation ('may be used') part.
I'll stand corrected. ;)
Scott
-Original Message-
From: Steve Bertrand [mailto
Steve Bertrand wrote:
> Scott Morris wrote:
>> There aren't sequence numbers with ICMP. And the timeout value is
>> watched/triggered before the next ICMP is sent, so there shouldn't really be
>> any ordering problem/interpretation anyway.
>
> FYI, from RFC 792:
My apologies. I should have actua
Scott Morris wrote:
> There aren't sequence numbers with ICMP. And the timeout value is
> watched/triggered before the next ICMP is sent, so there shouldn't really be
> any ordering problem/interpretation anyway.
FYI, from RFC 792:
Sequence Number
Description
The data received in th
Martin Hannigan wrote:
> Is all of this terrestrial network already in place?
>
> http://www.hiberniaatlantic.com/maps/HA_NIreland_Routes.pdf
I understand that it isn't yet, but that it can be built out relatively
quickly.
Nick
On Tue, 6 Jan 2009, Scott Morris wrote:
There aren't sequence numbers with ICMP. And the timeout value is
watched/triggered before the next ICMP is sent, so there shouldn't really be
any ordering problem/interpretation anyway.
Linux ping command does sequencing (so that part of your statement
There aren't sequence numbers with ICMP. And the timeout value is
watched/triggered before the next ICMP is sent, so there shouldn't really be
any ordering problem/interpretation anyway.
HTH,
Scott
-Original Message-
From: Zhao Ping [mailto:pzhao...@gmail.com]
Sent: Tuesday, January 06
Sorry I have question
Why it needs default routes when running BGP?
Thank you
Kai Chen wrote:
Will this default route 0.0.0.0/0 be exporting to AS-level neighbors?
On Mon, Jan 5, 2009 at 8:49 PM, Edward B. DREGER
wrote:
> KC> Date: Mon, 5 Jan 2009 18:05:48 -0600
> KC> From: Kai Che
Considering that Ciscos wait for a response before sending the next
echo-request, you should never end up in a situation where replys are
received out of order.
That is going by my knowledge of traditional IOS. Ive not yet had any
experience with IOS XE or XR to be able to quote any other e
Actually, it is a big deal. Hibernia is already the only cable system that can
send Irish traffic directly to North American without backhauling to the UK.
That's a significantly latency and diversity advantage.
We can now send traffic directly to the US on both cables without UK backhaul
and
Hi,
Does someone happen to know how the Cisco IOS handle the out-of-order
ICMP echo-reply packets? print it as success or lose?
Thanks,
Zhao Ping
On Tue, Jan 6, 2009 at 1:02 AM, Martin List-Petersen wrote:
> Martin Hannigan wrote:
> > Hibernia has been busy.
> >
> > "THE COMMUNICATIONS minister Eamon Ryan and the North's Enterprise
> Minister
> > Arlene Foster have announced the awarding of a £30 million (€32 million)
> > contract to constr
34 matches
Mail list logo
