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
Hi,
Tell them you know where John Connor is, and all APIs will open up :)
Thanks,
Sabri
- On Aug 29, 2023, at 5:12 PM, Troy via NANOG wrote:
> If there's somebody that knows which geo list Open AI uses (or somebody from
> Open AI is on the list) - can you please contact me off list.
Tom Beecher wrote on 8/30/23 8:22 AM:
vendors should adopt RFC7606
Yes
and not be absolutely awful at responding to vulnerability
reporting.
1. This isn't exactly new. It's been possible to do this since the
original days of BGP.
Literally the first thing that came into my
You may treat-as-withdraw instead of discard.
However, this attribute does not affect routing.
It only affects whether a sender of packets to the route will add the entropy
label or not to the MPLS header, if such an MPLS header is added.
Therefore, it is safe to discard the attribute.
Kind
>
> vendors should adopt RFC7606
>
Yes
and not be absolutely awful at responding to vulnerability reporting.
1. This isn't exactly new. It's been possible to do this since the original
days of BGP.
2. Probably not wise to assume that's accurate just because he thinks that
is true.
On Wed,
IOS-XR passes on the attribute by default.
Some other routers incorrectly claim it to be malformed and reset the BGP
session.
IOS-XR has a configuration to discard an attribute, so it will not pass it on.
It will pass the route with all its other attributes.
Here is an example configuration:
Fair update. To be clear, though, the main point of the article stands, and is maybe even strengthened by the update. A corrupted attribute def can cause the behavior (personal experience speaking here with a different attribute) and vendors should adopt RFC7606 and not be absolutely awful at
The blog was updated. Correct link:
https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling
The attribute was not malformed.
This is the hex dump of the attribute: “E0 1C 00”
It is described here.
https://www.rfc-editor.org/rfc/rfc6790#section-5.2
This attribute is deprecated, but
If there's somebody that knows which geo list Open AI uses (or somebody from
Open AI is on the list) - can you please contact me off list.
Our ranges seem to have been blocked from accessing the API and platform
management tools. We can access the chat demos, but that is all.
Regardless of the
>
> Or do the sensible thing and just drop the announcement and log the
> problem.
>
Which is exactly what an RFC7606 compliant device will do for an unknown
path attribute.
https://www.rfc-editor.org/rfc/rfc7606#page-5
o Treat-as-withdraw: In this approach, the UPDATE message containing
On Wed, Aug 30, 2023 at 4:04 PM William Herrin wrote:
> On Wed, Aug 30, 2023 at 4:50 AM Mike Lyon wrote:
> > Ran across this article today and haven't seen posts about it so i
> > figured I would share:
> >
> > https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling
>
> Can you
On Wed, Aug 30, 2023 at 4:50 AM Mike Lyon wrote:
> Ran across this article today and haven't seen posts about it so i
> figured I would share:
>
> https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling
Can you imagine, as the origin of a route, troubleshooting a
connectivity
Thanks for sharing this, Mike. I saw it on lobste.rs yesterday and
figured everyone would be ahead.
I'm running VyOS in a volunteer WISP but not with BGP peering... I'm
thinking to test it now as we'll likely swap in VyOS for it soon.
I saw this PR as a reply on Mastodon:
Ran across this article today and haven't seen posts about it so i
figured I would share:
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