comments below:
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
David Raistrick
Sent: Friday, July 06, 2001 3:33 PM
To: [EMAIL PROTECTED]
Subject: Re: advertising IP blocks [7:11191]
On Fri, 6 Jul 2001, John Neiberger wrote:
> It's important to think about what we consider to be failures in our ISP
> and then ask the question: "What are we protecting ourselves from?" In
> our case, more often than not an outage is caused by downtime on our
> directly connected router or a failure on the physical link itself,
> between the CO and our building.
Mmm.
I'm prone to disagree. Most of the outages with the last ISP i ran, as
far as our backbone was concerned, were major outages with our
upstream. Bellsouth.net of all wonderful things.
-----
CL: does Bellsouth run their own backbone, or use someone else's? I ask
because at least one major telco with whom I have some experience is not
permitted by the regulatory agencies to run their own, so they use "major
carrier's" backbone
-------
Between local hardware upgrades lasting three days (at the local bs.n pop,
NOT telco issues), instead of two hours, or various flapping interfaces
further upstream, to complete loss of connectivity to their upstream. (uu)
CL: check out the NANOG archives for discussions about "clue"
And this was with two circuits in two seperate lata. both ds3 frames.
CL: see previous comment
A small dialup operation that we picked up as a bs.n line and a sprintlink
line. Both had fairly regular failure patterns upstream as well.
------
CL: just cuz you think you have diversity doesn't mean you do. there was an
incident in a relatively large metro area someplace out west not too long
ago. The whole area's internet access went down when "major backbone
provider" went down. Turns out every ISP in that area eventually connected
to "major backbone provider"
-------
And going back further to another small ISP, we had a t1 to uu...and
again, other then having /two/ 2525's die cold turkey, the only outages
were upstream of us at at uu's end.
Sure, there are a reasonable number of local problems that hit us all, but
I still put more faith on my local side the I do the upstreams.
CL: in the end, it's all about faith, isn't it.
my few worthless thoughts..
CL: worthless? NOT! - your points are well made and well worth considering.
thanks for the conversation.
..david
---
david raistrick (deep in the south georgia woods)
[EMAIL PROTECTED]
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=11216&t=11191
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