On 10/26/17 10:58, Jason Lixfeld wrote:
> Hi,
>
> Of all the ISPs that I am familiar with that have a BGP community structure
> usable by their peering partners and/or downstream customers, among other
> things, they allow the customer to signal the ISP to prepend their own AS to
> the as-path o
I received replied from several friendly Comcast staff members and it
looks like there will be a resolution shortly.
Thanks, and sorry for the list noise.
-A
On Thu, Oct 26, 2017 at 3:33 PM, Aaron C. de Bruyn wrote:
> I'm hoping a Comcast engineer can clear something up for me:
>
> If I recall
I'm hoping a Comcast engineer can clear something up for me:
If I recall correctly siteprotect.com is used by Comcast Business hosting.
We have a mutual customer who has their domain NS pointed at
ADNS.CS.SITEPROTECT.COM and BDNS.CS.SITEPROTECT.COM and those servers
resolve their domain properly,
No, Mr Herrin was correct in the first place. The BGP communities are used to
control to which peers the prepend is applied. You cannot do this within your
own BGP configuration. Here is the use case.
I have a connection to AT&T and I have one to Comcast
I want AT&T customers to come to me o
I believe that Jason is asking about an ISP BGP community to prepend
their AS when the BGP routes are received from the customer (not when
advertising to a peer). I don't see a functional difference between
the two and I suspect that ISPs added support for convenience. If you
already send BGP c
On Thu, Oct 26, 2017 at 03:05:25PM -0400, William Herrin wrote:
>
> You'd only use communities like that if you want to signal the ISP to
> deprioritize your advertisement on a particular peer or set of peers but
> not others. That's when you're getting fancy. It's not the norm. The norm
> is you
That is exactly correct. It is normally used to control which peers the ISP is
prepended to. Many times the ISP has a guide that shows several different
communities you can use to further control BGP beyond what you normally could
do yourself.
Steven Naslund
Chicago IL
-Original Message-
In a message written on Thu, Oct 26, 2017 at 02:47:44PM -0400, Jason Lixfeld
wrote:
> I understand how prepends fit in the context of best path selection, but my
> question was more the difference between a customer signalling the ISP to
> prepend their AS using a BGP community stamped to a pref
On Thu, Oct 26, 2017 at 3:05 PM, William Herrin wrote:
> On Thu, Oct 26, 2017 at 2:47 PM, Jason Lixfeld
> wrote:
> You'd only use communities like that if you want to signal the ISP to
> deprioritize your advertisement on a particular peer or set of peers but
> not others. That's when you're get
> On Oct 26, 2017, at 2:55 PM, Job Snijders wrote:
>
> If Network B offers some kind of “Prepend to Network C” BGP community,
> network A will be able to utilize all of network B except the pieces that
> perform less well. (This is ofcourse assuming that Network C picks some
> alternative pat
On Thu, Oct 26, 2017 at 2:47 PM, Jason Lixfeld
wrote:
> Hi Bill,
>
> > On Oct 26, 2017, at 2:37 PM, William Herrin wrote:
> >
> > BGP routing is based on "distance". Distance in BGP is primarily
> calculated as the number of ASNs in the AS Path. Prepends make a path more
> distance, encouraging
Hi,
In context of traffic engineering it may be that Network A (customer of
Network B) observes that performance is suboptimal between Network B and
Network C.
If Network B offers some kind of “Prepend to Network C” BGP community,
network A will be able to utilize all of network B except the piec
On Thu, Oct 26, 2017 at 2:47 PM, Jason Lixfeld
wrote:
> Hi Bill,
>
> > On Oct 26, 2017, at 2:37 PM, William Herrin wrote:
> >
> > BGP routing is based on "distance". Distance in BGP is primarily
> calculated as the number of ASNs in the AS Path. Prepends make a path more
> distance, encouraging
Hi Bill,
> On Oct 26, 2017, at 2:37 PM, William Herrin wrote:
>
> BGP routing is based on "distance". Distance in BGP is primarily calculated
> as the number of ASNs in the AS Path. Prepends make a path more distance,
> encouraging routers to choose a different path if one is available.
I und
On Thu, Oct 26, 2017 at 1:58 PM, Jason Lixfeld
wrote:
> Of all the ISPs that I am familiar with that have a BGP community
> structure usable by their peering partners and/or downstream customers,
> among other things, they allow the customer to signal the ISP to prepend
> their own AS to the as-p
Hi,
Of all the ISPs that I am familiar with that have a BGP community structure
usable by their peering partners and/or downstream customers, among other
things, they allow the customer to signal the ISP to prepend their own AS to
the as-path of a particular prefix announcement.
What functiona
http://www.crestpt.com/data-center-infrastructure-management-dcim.html
-Original Message-
From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Jameson, Daniel
Sent: Thursday, October 26, 2017 11:32 AM
To: Craig; nanog group
Subject: RE: Physical Layer fiber Software Tools?
Give this
was the link attached?
On Thu, Oct 26, 2017 at 1:31 PM, Jameson, Daniel <
daniel.jame...@tdstelecom.com> wrote:
> Give this a look. It can track to the cross-connect level, then provide
> a one-line drawing. Application is web driven and expandable. It should be
> able to do what you need.
>
>
Give this a look. It can track to the cross-connect level, then provide a
one-line drawing. Application is web driven and expandable. It should be able
to do what you need.
-Original Message-
From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Craig
Sent: Thursday, October 26,
https://en.wikipedia.org/wiki/Data_center_infrastructure_management
Many solutions exist. Some are targeted for different uses.
Look at https://netbox.readthedocs.io/en/latest/data-model/circuits/ for
some terminology that might help in your search.
On Thu, Oct 26, 2017 at 10:08 AM, Craig wrot
I am hoping someone could help me out with some suggestions for any
software that is available, for individuals that are doing physical layer
wiring in a data center?
The idea is the technician is performing the fiber runs from say RACK 111
router AAA port 1/1/1 to RACK 222 router BBB port 1/1/1
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