Right on...
~Jay Murphy
IP Network Specialist
NM State Government
IT Services Division
PSB - IP Network Management Center
Santa Fé, New México 87505
"We move the information that moves your world."
"Good engineering demands that we understand what we're doing and why, keep an
open mind, and learn from experience."
"Engineering is about finding the sweet spot between what's solvable and what
isn't."
Radia Perlman
P Please consider the environment before printing e-mail
From: [email protected] [mailto:[email protected]] On Behalf Of Dorn Hetzel
Sent: Monday, June 07, 2010 4:41 PM
To: Steve Bertrand
Cc: Murphy, Jay, DOH; [email protected]
Subject: Re: Strange practices?
Perhaps the providers BGP is just being fed from interface anchored static
routes which will, hopefully, drop out if the customer facing interface goes
down. Of course, this is realistic if we're talking about actual circuits like
a T-1, not so much if we're talking metro ethernet or something...
On Mon, Jun 7, 2010 at 6:38 PM, Steve Bertrand <[email protected]> wrote:
On 2010.06.07 17:59, Murphy, Jay, DOH wrote:
>
>
> "So if the enterprise loses connectivity to one of these two providers, does
> the provider without working connectivity to the enterprise have mechanism in
> place to cease originating the address space?"
>
>
>
> Yes, BGP updates.
...again, I'm confused.
BGP updates from where to where? From how I understand the OP's original
question, there is no BGP.
Hence, if one of the providers is statically routing the prefix to an
interface or un-numbered as opposed to an IP address, then blackholing
can occur if IP reachability is broken, but the link-layer is not. Is
this not correct?
Steve
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