More likely than not both circuits share some equipment along the way. It's
not uncommon for carriers to use third party networks if they don't own
facilities in the area...
You *can* ask for proper circuit diversity from one carrier. You will pay
more but you'll know (at least as much as you can with any carrier) that the
circuits will be diverse.
If you just try 2 seperate carriers you can end up with some common points.
At least when you are paying for diversity (from a single carrier) you can
bitch about problems like you describe.
I've seen the same problem in other areas... WE host in a large co-locate
facility. Lots of smaller "co-locate" services also host there. If seen
several cases where non-local companies host with 2 seperate "co-locate"
companies only to have both sets of equipment in the same facilities.....
-----Original Message-----
From: Bradley J. Wilson [mailto:[EMAIL PROTECTED]]
Sent: Sunday, June 17, 2001 6:06 PM
To: [EMAIL PROTECTED]
Subject: Re: Complete Redundancy [7:8409]
Right now I'm dealing with a situation in which my company has two redundant
frame relay links to Botany Australia. One through Sprint, and the other
through AT&T. We were experiencing really bad latency on the AT&T link (up
to 1.2 seconds), so I moved all the traffic over to the Sprint link once it
was installed. No change, though, in the latency. I used Concord Net
Health to measure the latency, and it was *exactly* the same over both the
AT&T link and the Sprint link - they spiked at the exact same times, and to
the same degree. They must be going over the same satellite link or
whatever, but *something* is amiss here....
----- Original Message -----
From: Chuck Larrieu
To: [EMAIL PROTECTED]
Sent: Friday, June 15, 2001 10:46 AM
Subject: RE: Complete Redundancy [7:8409]
The world is a single point of failure. :->
Seriously, something often overlooked - the ISP's themselves, their
backbones, their peering.
Not too long ago, up in the Sacramento area, some folks found out the hard
way that even though they were dual homed, both ISP's used the same backbone
provider. When that provider had a failure, both ISP's were down ( along
with several others in the area, all of whom used this same Tier 1 as their
backbone )
If the customer really does require "absolute complete redundancy" then you
and they should be doing a lot of research.
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Andy
Barkl
Sent: Wednesday, June 13, 2001 2:09 PM
To: [EMAIL PROTECTED]
Subject: Complete Redundancy [7:8409]
I have a client who needs "absolute" complete redundancy for their Internet
service.
I assume they should be using 2 separate links with different ISPs. What I
don't have hands-on experience with is the physical connections and HSRP.
Will I connect both routers to the local switch and then configure HSRP
between them?
Any help would be greatly appreciated.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=8948&t=8409
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