Hi Jeff,
We have tested FRR (v6.0.2) indeed and found that duplicates are not
suppressed by default.
We will publish more detailed results and configurations on the website
soon.
Thomas
On 10/21/20 4:35 PM, Jeff Tantsura wrote:
>
> Hi Thomas,
>
> We had a similar discussion on FRR slack, there
Hi Thomas,
We had a similar discussion on FRR slack, there are some duplicates indeed.
Are you planing to test FRR at some point in time?
Cheers,
Jeff
On Oct 21, 2020, 3:58 PM -0700, Jakob Heitz (jheitz) via NANOG
, wrote:
> Thomas,
>
> I confirmed your case and took a look at the code.
> The ou
Thomas,
I confirmed your case and took a look at the code.
The outbound duplicate suppression function tries to detect
duplicates without actually storing or recreating the
previously sent update, so it misses some cases.
Your use case is a good one. We will check to see if we can
detect it witho
Hi Jakob.
The simple configuration below allows communities to be forwarded
(send-community-ebgp), but are cleaned at egress (using route-policy and
community-set).
In the experiment, the router receives announcements with altering
community attributes only, from the internal peer. After the filt
This feature suppresses outgoing duplicates. Another feature ignores incoming
duplicates from any BGP session.
Regards,
Jakob.
> On Oct 18, 2020, at 1:46 AM, Clemens Mosig wrote:
>
> On 18.10.20 00:59, Jakob Heitz (jheitz) via NANOG wrote:
>> IOS-XR has duplicate update suppression logic for
On 18.10.20 00:59, Jakob Heitz (jheitz) via NANOG wrote:
IOS-XR has duplicate update suppression logic for EBGP sessions,
not for IBGP sessions.
Does this feature hinder incoming duplicates from triggering best path
selection or does it stop the export of duplicates?
Cheers,
Clemens
> IOS-XR has duplicate update suppression logic for EBGP sessions
as, i believe, do most all implementations, to protect best path
computation costs.
randy
IOS-XR has duplicate update suppression logic for EBGP sessions,
not for IBGP sessions.
If you are using EBGP and seeing a fault in the duplicate update
suppression logic in IOS-XR, please let me know configs and details
of the experiment.
Regards,
Jakob.
-Original Message-
Date: Thu, 15
Dear NANOG,
As a team of researchers from NPS and TU Berlin, we are investigating
the impact of BGP community attributes on the update behavior between ASes.
We find that when a route is associated with multiple distinct community
attributes it does not only lead to multiple announcement at the t
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