Hi Michael,
> two datacenters which user traffic can egress, and if one is used we want
that traffic to return to the same
> data center. It is a problem of asymmetry. It appears the only tools we
have are AS_Path and MED, and so
> I have been searching for another solution, that is when I came
On 8/30/23 18:56, michael brooks - ESC wrote:
I, too, am looking for something sexy (explained below). But can you
explain why you think AS_PATH is "useless," Mark?
Because most network operators use LOCAL_PREF heavily, and no amount of
AS_PATH prepending will be able fight that with any
>With AS-PATH prepend you have no control on the choice of which ASN should
do what action on your advertisements.
Robert- It is somewhat this problem we are trying to resolve.
>I was imagining something sexier, especially given how pretty "useless"
AS_PATH prepending is nowadays.
I, too, am
On 8/22/23 16:46, Tom Beecher wrote:
Again, as it was stated, the size of or number of BGP communities
wasn't the problem anyway; it was hashing / memory storage. And you
know what? Hashing / memory storage HAS been a problem with multiple
vendors in many other contexts, not just BGP
>
> What I am saying is that for those that have been fixed, unless someone
> can offer up any additional evidence in 2023, the size of the number of BGP
> communities attached to a path does not scream "danger" in 2023 hardware.
> And the T1600 is a long time ago.
>
Again, as it was stated,
On 8/21/23 17:44, Tom Beecher wrote:
So, while this all sounds good, without any specifics on vendor,
box, code, code revision number, fix, year it happened, current
status, e.t.c., I can't offer any meaningful engagement.
If you clicked Matt's link to the Google search, you
>
> So, while this all sounds good, without any specifics on vendor, box,
> code, code revision number, fix, year it happened, current status, e.t.c.,
> I can't offer any meaningful engagement.
>
If you clicked Matt's link to the Google search, you could tell from the
results what vendor , model,
On Fri, 18 Aug 2023, Matthew Petach wrote:
Hi Robert,
Without naming any names, I will note that at some point in the not-too-distant
past, I was part of a new-years-eve-holiday-escalation to
$BACKBONE_ROUTER_PROVIDER when
the global network I was involved with started seeing excessive
On 8/19/23 00:22, Matthew Petach wrote:
Hi Mark,
I know it's annoying that I won't mention specifics.
Unfortunately, the last time I mentioned $vendor-specific information
on NANOG, it was picked up by the press, and turned into a
multimillion dollar kerfuffle with me at the center of the
On Fri, Aug 18, 2023 at 2:36 PM Mark Tinka wrote:
> [...]
> To be fair, you are talking about an arbitrary value of years back, on
> boxes you don't name running code you won't mention.
>
> This really not saying much :-).
>
Hi Mark,
I know it's annoying that I won't mention specifics.
On 8/18/23 22:40, Matthew Petach wrote:
Hi Robert,
Without naming any names, I will note that at some point in the
not-too-distant past, I was part of a new-years-eve-holiday-escalation
to $BACKBONE_ROUTER_PROVIDER when the global network I was involved
with started seeing excessive
On 8/18/23 22:20, Jakob Heitz (jheitz) via NANOG wrote:
We support platforms of various capacities.
While we would all like to sell the large ones, people buy the cheap
ones too.
Even a bare bones x86 platform of some sort with at least 8GB of RAM
would make the cheapest routers still,
On 8/18/23 19:38, Jakob Heitz (jheitz) via NANOG wrote:
That's true Robert.
However, communities and med only work with neighbors.
Communities routinely get scrubbed because they cause increased memory
usage and convergence time in routers.
Really?
We only scrub a specific string of
On 8/18/23 09:38, Robert Raszuk wrote:
Jakob,
With AS-PATH prepend you have no control on the choice of which ASN
should do what action on your advertisements.
My comprehension of DPA would have been more directed than the "spray &
pray" approach AS_PATH prepending provides.
However,
On 8/18/23 09:38, Robert Raszuk wrote:
Jakob,
With AS-PATH prepend you have no control on the choice of which ASN
should do what action on your advertisements.
My comprehension of DPA would have been more directed than the "spray &
pray" approach AS_PATH prepending provides.
However,
> it's really about efficiently *parsing and updating* communities--
Absolutely correct.
Inefficient implementations of how communities are used in inbound or
outbound policies can do a lot of harm - no doubt about that - and as you
say some surface in least convenient moments.
But the point I
:20 PM
To: Robert Raszuk
Cc: nanog@nanog.org
Subject: Re: Destination Preference Attribute for BGP
We support platforms of various capacities.
While we would all like to sell the large ones, people buy the cheap ones too.
Kind Regards,
Jakob
From: Robert Raszuk
Date: Friday, August 18, 2023
og.org>
mailto:nanog@nanog.org>>
Subject: Re: Destination Preference Attribute for BGP
Hi Jakob,
On Fri, Aug 18, 2023 at 7:41 PM Jakob Heitz (jheitz) via NANOG
mailto:nanog@nanog.org>> wrote:
That's true Robert.
However, communities and med only work with neighbors.
Commun
k on code and with customer issues that escalate to code.
>
>
>
> Kind Regards,
>
> Jakob
>
>
>
>
>
> *From: *Robert Raszuk
> *Date: *Friday, August 18, 2023 at 10:59 AM
> *To: *Jakob Heitz (jheitz)
> *Cc: *nanog@nanog.org
> *Subject: *Re: Destination
Perhaps to you Robert.
I work on code and with customer issues that escalate to code.
Kind Regards,
Jakob
From: Robert Raszuk
Date: Friday, August 18, 2023 at 10:59 AM
To: Jakob Heitz (jheitz)
Cc: nanog@nanog.org
Subject: Re: Destination Preference Attribute for BGP
Hi Jakob,
On Fri, Aug 18
;
> Jakob
>
>
>
>
>
> *From: *Robert Raszuk
> *Date: *Friday, August 18, 2023 at 12:38 AM
> *To: *Jakob Heitz (jheitz)
> *Cc: *nanog@nanog.org
> *Subject: *Re: Destination Preference Attribute for BGP
>
> Jakob,
>
>
>
> With AS-PATH prepen
get dropped.
route-policy testRP
if as-path length ge 200 then
drop
endif
end-policy
Kind Regards,
Jakob
From: Robert Raszuk
Date: Friday, August 18, 2023 at 12:38 AM
To: Jakob Heitz (jheitz)
Cc: nanog@nanog.org
Subject: Re: Destination Preference Attribute for BGP
Jakob
Jakob,
With AS-PATH prepend you have no control on the choice of which ASN should
do what action on your advertisements.
However, the practice of publishing communities by (some) ASNs along with
their remote actions could be treated as an alternative to the DPA
attribute. It could result in
On 8/17/23 21:43, Jakob Heitz (jheitz) via NANOG wrote:
"prepend as-path" has taken its place.
That pours water on my imaginary fire :-).
I was imagining something sexier, especially given how pretty "useless"
AS_PATH prepending is nowadays.
Mark.
"prepend as-path" has taken its place.
Kind Regards,
Jakob
Date: Wed, 16 Aug 2023 21:42:22 +0200
From: Mark Tinka
On 8/16/23 16:16, michael brooks - ESC wrote:
> Perhaps (probably) naively, it seems to me that DPA would have been a
> useful BGP attribute. Can anyone shed light on why this
On 8/16/23 16:16, michael brooks - ESC wrote:
Perhaps (probably) naively, it seems to me that DPA would have been a
useful BGP attribute. Can anyone shed light on why this RFC never
moved beyond draft status? I cannot find much information on this
other than IETF's data tracker
Perhaps (probably) naively, it seems to me that DPA would have been a
useful BGP attribute. Can anyone shed light on why this RFC never moved
beyond draft status? I cannot find much information on this other than
IETF's data tracker (
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-dpa/) and
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